Fix lint error

- If a default IPv6 route is found, query the ip:port defined by `IPV6_CHECK_ADDRESS` to check for internet access

.golangci.yml

@@ -56,9 +56,6 @@ linters:
           - revive
         path: internal\/provider\/(common|utils)\/.+\.go
         text: "var-naming: avoid (bad|meaningless) package names"
-      - linters:
-          - lll
-        source: "^// https://.+$"
       - linters:
           - err113
           - mnd

Dockerfile

@@ -159,6 +159,8 @@ ENV VPN_SERVICE_PROVIDER=pia \
     FIREWALL_INPUT_PORTS= \
     FIREWALL_OUTBOUND_SUBNETS= \
     FIREWALL_DEBUG=off \
+    # IPv6
+    IPV6_CHECK_ADDRESS=[2606:4700::6810:84e5]:443 \
     # Logging
     LOG_LEVEL=info \
     # Health
@@ -171,14 +173,13 @@ ENV VPN_SERVICE_PROVIDER=pia \
     DNS_UPSTREAM_RESOLVER_TYPE=DoT \
     DNS_UPSTREAM_RESOLVERS=cloudflare \
     DNS_BLOCK_IPS= \
-    DNS_BLOCK_IP_PREFIXES= \
+    DNS_BLOCK_IP_PREFIXES=127.0.0.1/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,169.254.0.0/16,::1/128,fc00::/7,fe80::/10,::ffff:7f00:1/104,::ffff:a00:0/104,::ffff:a9fe:0/112,::ffff:ac10:0/108,::ffff:c0a8:0/112 \
     DNS_CACHING=on \
     DNS_UPSTREAM_IPV6=off \
     BLOCK_MALICIOUS=on \
     BLOCK_SURVEILLANCE=off \
     BLOCK_ADS=off \
     DNS_UNBLOCK_HOSTNAMES= \
-    DNS_REBINDING_PROTECTION_EXEMPT_HOSTNAMES= \
     DNS_UPDATE_PERIOD=24h \
     DNS_ADDRESS=127.0.0.1 \
     DNS_KEEP_NAMESERVER=off \
@@ -202,13 +203,10 @@ ENV VPN_SERVICE_PROVIDER=pia \
     HTTP_CONTROL_SERVER_LOG=on \
     HTTP_CONTROL_SERVER_ADDRESS=":8000" \
     HTTP_CONTROL_SERVER_AUTH_CONFIG_FILEPATH=/gluetun/auth/config.toml \
-    HTTP_CONTROL_SERVER_AUTH_DEFAULT_ROLE="{}" \
     # Server data updater
     UPDATER_PERIOD=0 \
     UPDATER_MIN_RATIO=0.8 \
     UPDATER_VPN_SERVICE_PROVIDERS= \
-    UPDATER_PROTONVPN_USERNAME= \
-    UPDATER_PROTONVPN_PASSWORD= \
     # Public IP
     PUBLICIP_FILE="/tmp/gluetun/ip" \
     PUBLICIP_ENABLED=on \
@@ -224,8 +222,8 @@ ENV VPN_SERVICE_PROVIDER=pia \
     # Extras
     VERSION_INFORMATION=on \
     TZ= \
-    PUID=1000 \
+    PUID= \
-    PGID=1000
+    PGID=
 ENTRYPOINT ["/gluetun-entrypoint"]
 EXPOSE 8000/tcp 8888/tcp 8388/tcp 8388/udp
 HEALTHCHECK --interval=5s --timeout=5s --start-period=10s --retries=3 CMD /gluetun-entrypoint healthcheck

cmd/gluetun/main.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io/fs"
 	"net/http"
+	"net/netip"
 	"os"
 	"os/exec"
 	"os/signal"
@@ -175,7 +176,7 @@ func _main(ctx context.Context, buildInfo models.BuildInformation,
 		Version:      buildInfo.Version,
 		Commit:       buildInfo.Commit,
 		Created:      buildInfo.Created,
-		Announcement: "All control server routes are now private by default",
+		Announcement: "All control server routes will become private by default after the v3.41.0 release",
 		AnnounceExp:  announcementExp,
 		// Sponsor information
 		PaypalUser:    "qmcgaw",
@@ -242,10 +243,13 @@ func _main(ctx context.Context, buildInfo models.BuildInformation,
 		return err
 	}
 
-	ipv6Supported, err := netLinker.IsIPv6Supported()
+	ipv6SupportLevel, err := netLinker.FindIPv6SupportLevel(ctx,
+		allSettings.IPv6.CheckAddress, firewallConf)
 	if err != nil {
 		return fmt.Errorf("checking for IPv6 support: %w", err)
 	}
+	ipv6Supported := ipv6SupportLevel == netlink.IPv6Supported ||
+		ipv6SupportLevel == netlink.IPv6Internet
 
 	err = allSettings.Validate(storage, ipv6Supported, logger)
 	if err != nil {
@@ -427,11 +431,10 @@ func _main(ctx context.Context, buildInfo models.BuildInformation,
 	parallelResolver := resolver.NewParallelResolver(allSettings.Updater.DNSAddress)
 	openvpnFileExtractor := extract.New()
 	providers := provider.NewProviders(storage, time.Now, updaterLogger,
-		httpClient, unzipper, parallelResolver, publicIPLooper.Fetcher(),
+		httpClient, unzipper, parallelResolver, publicIPLooper.Fetcher(), openvpnFileExtractor)
-		openvpnFileExtractor, allSettings.Updater)
 
 	vpnLogger := logger.New(log.SetComponent("vpn"))
-	vpnLooper := vpn.NewLoop(allSettings.VPN, ipv6Supported, allSettings.Firewall.VPNInputPorts,
+	vpnLooper := vpn.NewLoop(allSettings.VPN, ipv6SupportLevel, allSettings.Firewall.VPNInputPorts,
 		providers, storage, allSettings.Health, healthChecker, healthcheckServer, ovpnConf, netLinker, firewallConf,
 		routingConf, portForwardLooper, cmder, publicIPLooper, dnsLooper, vpnLogger, httpClient,
 		buildInfo, *allSettings.Version.Enabled)
@@ -467,12 +470,15 @@ func _main(ctx context.Context, buildInfo models.BuildInformation,
 	go shadowsocksLooper.Run(shadowsocksCtx, shadowsocksDone)
 	otherGroupHandler.Add(shadowsocksHandler)
 
+	controlServerAddress := *allSettings.ControlServer.Address
+	controlServerLogging := *allSettings.ControlServer.Log
 	httpServerHandler, httpServerCtx, httpServerDone := goshutdown.NewGoRoutineHandler(
 		"http server", goroutine.OptionTimeout(defaultShutdownTimeout))
-	httpServer, err := server.New(httpServerCtx, allSettings.ControlServer,
+	httpServer, err := server.New(httpServerCtx, controlServerAddress, controlServerLogging,
 		logger.New(log.SetComponent("http server")),
+		allSettings.ControlServer.AuthFilePath,
 		buildInfo, vpnLooper, portForwardLooper, dnsLooper, updaterLooper, publicIPLooper,
-		storage, ipv6Supported)
+		storage, ipv6SupportLevel.IsSupported())
 	if err != nil {
 		return fmt.Errorf("setting up control server: %w", err)
 	}
@@ -548,7 +554,9 @@ type netLinker interface {
 	Ruler
 	Linker
 	IsWireguardSupported() (ok bool, err error)
-	IsIPv6Supported() (ok bool, err error)
+	FindIPv6SupportLevel(ctx context.Context,
+		checkAddress netip.AddrPort, firewall netlink.Firewall,
+	) (level netlink.IPv6SupportLevel, err error)
 	PatchLoggerLevel(level log.Level)
 }
 

go.mod

@@ -3,14 +3,13 @@ module github.com/qdm12/gluetun
 go 1.25.0
 
 require (
-	github.com/ProtonMail/go-srp v0.0.7
 	github.com/breml/rootcerts v0.3.3
 	github.com/fatih/color v1.18.0
 	github.com/golang/mock v1.6.0
 	github.com/klauspost/compress v1.18.1
 	github.com/klauspost/pgzip v1.2.6
 	github.com/pelletier/go-toml/v2 v2.2.4
-	github.com/qdm12/dns/v2 v2.0.0-rc9.0.20251114155417-248acd28339f
+	github.com/qdm12/dns/v2 v2.0.0-rc9
 	github.com/qdm12/gosettings v0.4.4
 	github.com/qdm12/goshutdown v0.3.0
 	github.com/qdm12/gosplash v0.2.0
@@ -22,21 +21,17 @@ require (
 	github.com/vishvananda/netlink v1.3.1
 	github.com/youmark/pkcs8 v0.0.0-20201027041543-1326539a0a0a
 	golang.org/x/exp v0.0.0-20241009180824-f66d83c29e7c
-	golang.org/x/net v0.47.0
+	golang.org/x/net v0.46.0
-	golang.org/x/sys v0.38.0
+	golang.org/x/sys v0.37.0
-	golang.org/x/text v0.31.0
+	golang.org/x/text v0.30.0
 	golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173
 	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230429144221-925a1e7659e6
 	gopkg.in/ini.v1 v1.67.0
 )
 
 require (
-	github.com/ProtonMail/bcrypt v0.0.0-20211005172633-e235017c1baf // indirect
-	github.com/ProtonMail/go-crypto v1.3.0-proton // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/cloudflare/circl v1.6.1 // indirect
-	github.com/cronokirby/saferith v0.33.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/google/go-cmp v0.6.0 // indirect
 	github.com/josharian/native v1.1.0 // indirect
@@ -47,7 +42,6 @@ require (
 	github.com/mdlayher/socket v0.4.1 // indirect
 	github.com/miekg/dns v1.1.62 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/client_golang v1.20.5 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
@@ -56,11 +50,10 @@ require (
 	github.com/qdm12/goservices v0.1.1-0.20251104135713-6bee97bd4978 // indirect
 	github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 // indirect
 	github.com/vishvananda/netns v0.0.5 // indirect
-	golang.org/x/crypto v0.44.0 // indirect
+	golang.org/x/crypto v0.43.0 // indirect
-	golang.org/x/mod v0.29.0 // indirect
+	golang.org/x/mod v0.28.0 // indirect
-	golang.org/x/sync v0.18.0 // indirect
+	golang.org/x/sync v0.17.0 // indirect
-	golang.org/x/time v0.3.0 // indirect
+	golang.org/x/tools v0.37.0 // indirect
-	golang.org/x/tools v0.38.0 // indirect
 	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
 	google.golang.org/protobuf v1.35.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect

go.sum

@@ -1,23 +1,9 @@
-github.com/ProtonMail/bcrypt v0.0.0-20210511135022-227b4adcab57/go.mod h1:HecWFHognK8GfRDGnFQbW/LiV7A3MX3gZVs45vk5h8I=
-github.com/ProtonMail/bcrypt v0.0.0-20211005172633-e235017c1baf h1:yc9daCCYUefEs69zUkSzubzjBbL+cmOXgnmt9Fyd9ug=
-github.com/ProtonMail/bcrypt v0.0.0-20211005172633-e235017c1baf/go.mod h1:o0ESU9p83twszAU8LBeJKFAAMX14tISa0yk4Oo5TOqo=
-github.com/ProtonMail/go-crypto v0.0.0-20230321155629-9a39f2531310/go.mod h1:8TI4H3IbrackdNgv+92dI+rhpCaLqM0IfpgCgenFvRE=
-github.com/ProtonMail/go-crypto v1.3.0-proton h1:tAQKQRZX/73VmzK6yHSCaRUOvS/3OYSQzhXQsrR7yUM=
-github.com/ProtonMail/go-crypto v1.3.0-proton/go.mod h1:9whxjD8Rbs29b4XWbB8irEcE8KHMqaR2e7GWU1R+/PE=
-github.com/ProtonMail/go-srp v0.0.7 h1:Sos3Qk+th4tQR64vsxGIxYpN3rdnG9Wf9K4ZloC1JrI=
-github.com/ProtonMail/go-srp v0.0.7/go.mod h1:giCp+7qRnMIcCvI6V6U3S1lDDXDQYx2ewJ6F/9wdlJk=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/breml/rootcerts v0.3.3 h1://GnaRtQ/9BY2+GtMk2wtWxVdCRysiaPr5/xBwl7NKw=
 github.com/breml/rootcerts v0.3.3/go.mod h1:S/PKh+4d1HUn4HQovEB8hPJZO6pUZYrIhmXBhsegfXw=
-github.com/bwesterb/go-ristretto v1.2.0/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/cloudflare/circl v1.1.0/go.mod h1:prBCrKB9DV4poKZY1l9zBXg2QJY7mvgRvtMxxK7fi4I=
-github.com/cloudflare/circl v1.6.1 h1:zqIqSPIndyBh1bjLVVDHMPpVKqp8Su/V+6MeDzzQBQ0=
-github.com/cloudflare/circl v1.6.1/go.mod h1:uddAzsPgqdMAYatqJ0lsjX1oECcQLIlRpzZh3pJrofs=
-github.com/cronokirby/saferith v0.33.0 h1:TgoQlfsD4LIwx71+ChfRcIpjkw+RPOapDEVxa+LhwLo=
-github.com/cronokirby/saferith v0.33.0/go.mod h1:QKJhjoqUtBsXCAVEjw38mFqoi7DebT7kthcD7UzbnoA=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
@@ -57,8 +43,6 @@ github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/pelletier/go-toml/v2 v2.2.4 h1:mye9XuhQ6gvn5h28+VilKrrPoQVanw5PMw/TB0t5Ec4=
 github.com/pelletier/go-toml/v2 v2.2.4/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
-github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
-github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v1.20.5 h1:cxppBPuYhUnsO6yo/aoRol4L7q7UFfdm+bR9r+8l63Y=
@@ -69,8 +53,8 @@ github.com/prometheus/common v0.60.1 h1:FUas6GcOw66yB/73KC+BOZoFJmbo/1pojoILArPA
 github.com/prometheus/common v0.60.1/go.mod h1:h0LYf1R1deLSKtD4Vdg8gy4RuOvENW2J/h19V5NADQw=
 github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
 github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
-github.com/qdm12/dns/v2 v2.0.0-rc9.0.20251114155417-248acd28339f h1:6wN5D9wACfmXDsQ366egVt0jXY4nqL/QnIwg4nWhXco=
+github.com/qdm12/dns/v2 v2.0.0-rc9 h1:qDzRkHr6993jknNB/ZOCnZOyIG6bsZcl2MIfdeUd0kI=
-github.com/qdm12/dns/v2 v2.0.0-rc9.0.20251114155417-248acd28339f/go.mod h1:98foWgXJZ+g8gJIuO+fdO+oWpFei5WShMFTeN4Im2lE=
+github.com/qdm12/dns/v2 v2.0.0-rc9/go.mod h1:98foWgXJZ+g8gJIuO+fdO+oWpFei5WShMFTeN4Im2lE=
 github.com/qdm12/goservices v0.1.1-0.20251104135713-6bee97bd4978 h1:TRGpCU1l0lNwtogEUSs5U+RFceYxkAJUmrGabno7J5c=
 github.com/qdm12/goservices v0.1.1-0.20251104135713-6bee97bd4978/go.mod h1:D1Po4CRQLYjccnAR2JsVlN1sBMgQrcNLONbvyuzcdTg=
 github.com/qdm12/gosettings v0.4.4 h1:SM6tOZDf6k8qbjWU8KWyBF4mWIixfsKCfh9DGRLHlj4=
@@ -100,72 +84,48 @@ github.com/vishvananda/netns v0.0.5/go.mod h1:SpkAiCQRtJ6TvvxPnOSyH3BMl6unz3xZla
 github.com/youmark/pkcs8 v0.0.0-20201027041543-1326539a0a0a h1:fZHgsYlfvtyqToslyjUt3VOPF4J7aK/3MPcK7xp3PDk=
 github.com/youmark/pkcs8 v0.0.0-20201027041543-1326539a0a0a/go.mod h1:ul22v+Nro/R083muKhosV54bj5niojjWZvU8xrevuH4=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.43.0 h1:dduJYIi3A3KOfdGOHX8AVZ/jGiyPa3IbBozJ5kNuE04=
-golang.org/x/crypto v0.7.0/go.mod h1:pYwdfH91IfpZVANVyUOhSIPZaFoJGxTFbZhFTx+dXZU=
+golang.org/x/crypto v0.43.0/go.mod h1:BFbav4mRNlXJL4wNeejLpWxB7wMbc79PdRGhWKncxR0=
-golang.org/x/crypto v0.44.0 h1:A97SsFvM3AIwEEmTBiaxPPTYpDC47w720rdiiUvgoAU=
-golang.org/x/crypto v0.44.0/go.mod h1:013i+Nw79BMiQiMsOPcVCB5ZIJbYkerPrGnOa00tvmc=
 golang.org/x/exp v0.0.0-20241009180824-f66d83c29e7c h1:7dEasQXItcW1xKJ2+gg5VOiBnqWrJc+rq0DPKyvvdbY=
 golang.org/x/exp v0.0.0-20241009180824-f66d83c29e7c/go.mod h1:NQtJDoLvd6faHhE7m4T/1IY708gDefGGjR/iUW8yQQ8=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.28.0 h1:gQBtGhjxykdjY9YhZpSlZIsbnaE2+PgjfLWUQTnoZ1U=
-golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/mod v0.28.0/go.mod h1:yfB/L0NOf/kmEbXjzCPOx1iK1fRutOydrCMsqRhEBxI=
-golang.org/x/mod v0.29.0 h1:HV8lRxZC4l2cr3Zq1LvtOsi/ThTgWnUk/y64QSs8GwA=
-golang.org/x/mod v0.29.0/go.mod h1:NyhrlYXJ2H4eJiRy/WDBO6HMqZQ6q9nk4JzS3NuCK+w=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.46.0 h1:giFlY12I07fugqwPuWJi68oOnpfqFnJIJzaIIm2JVV4=
-golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.46.0/go.mod h1:Q9BGdFy1y4nkUwiLvT5qtyhAnEHgnQ/zd8PfU6nc210=
-golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
-golang.org/x/net v0.47.0 h1:Mx+4dIFzqraBXUugkia1OOvlD6LemFo1ALMHjrXDOhY=
-golang.org/x/net v0.47.0/go.mod h1:/jNxtkgq5yWUGYkaZGqo27cfGZ1c5Nen03aYrrKpVRU=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
-golang.org/x/sync v0.18.0 h1:kr88TuHDroi+UVf+0hZnirlk8o8T+4MrK6mr60WkH/I=
-golang.org/x/sync v0.18.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
-golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/term v0.6.0/go.mod h1:m6U89DPEgQRMq3DNkDClhWw02AUbt2daBVO4cn4Hv9U=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.30.0 h1:yznKA/E9zq54KzlzBEAWn1NXSQ8DIp/NYMy88xJjl4k=
-golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.30.0/go.mod h1:yDdHFIX9t+tORqspjENWgzaCVXgk0yYnYuSZ8UzzBVM=
-golang.org/x/text v0.8.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
+golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 h1:vVKdlvoWBphwdxWKrFZEuM0kGgGLxUOYcY4U/2Vjg44=
-golang.org/x/text v0.31.0 h1:aC8ghyu4JhP8VojJ2lEHBnochRno1sgL6nEi9WGFGMM=
+golang.org/x/time v0.0.0-20220210224613-90d013bbcef8/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-golang.org/x/text v0.31.0/go.mod h1:tKRAlv61yKIjGGHX/4tP1LTbc13YSec1pxVEWXzfoeM=
-golang.org/x/time v0.3.0 h1:rg5rLMjNzMS1RkNLzCG38eapWhnYLFYXDXj2gOlr8j4=
-golang.org/x/time v0.3.0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.37.0 h1:DVSRzp7FwePZW356yEAChSdNcQo6Nsp+fex1SUW09lE=
-golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/tools v0.37.0/go.mod h1:MBN5QPQtLMHVdvsbtarmTNukZDdgwdwlO5qGacAzF0w=
-golang.org/x/tools v0.38.0 h1:Hx2Xv8hISq8Lm16jvBZ2VQf+RLmbd7wVUsALibYI/IQ=
-golang.org/x/tools v0.38.0/go.mod h1:yEsQ/d/YK8cjh0L6rZlY8tgtlKiBNTL14pGDJPJpYQs=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

internal/cli/noopfirewall.go

@@ -0,0 +1,14 @@
+package cli
+
+import (
+	"context"
+	"net/netip"
+)
+
+type noopFirewall struct{}
+
+func (f *noopFirewall) AcceptOutput(_ context.Context, _, _ string, _ netip.Addr,
+	_ uint16, _ bool,
+) (err error) {
+	return nil
+}

internal/cli/openvpnconfig.go

@@ -11,6 +11,7 @@ import (
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
 	"github.com/qdm12/gluetun/internal/models"
+	"github.com/qdm12/gluetun/internal/netlink"
 	"github.com/qdm12/gluetun/internal/openvpn/extract"
 	"github.com/qdm12/gluetun/internal/provider"
 	"github.com/qdm12/gluetun/internal/storage"
@@ -40,7 +41,9 @@ type IPFetcher interface {
 }
 
 type IPv6Checker interface {
-	IsIPv6Supported() (supported bool, err error)
+	FindIPv6SupportLevel(ctx context.Context,
+		checkAddress netip.AddrPort, firewall netlink.Firewall,
+	) (level netlink.IPv6SupportLevel, err error)
 }
 
 func (c *CLI) OpenvpnConfig(logger OpenvpnConfigLogger, reader *reader.Reader,
@@ -58,12 +61,14 @@ func (c *CLI) OpenvpnConfig(logger OpenvpnConfigLogger, reader *reader.Reader,
 	}
 	allSettings.SetDefaults()
 
-	ipv6Supported, err := ipv6Checker.IsIPv6Supported()
+	ipv6SupportLevel, err := ipv6Checker.FindIPv6SupportLevel(context.Background(),
+		allSettings.IPv6.CheckAddress, &noopFirewall{})
 	if err != nil {
 		return fmt.Errorf("checking for IPv6 support: %w", err)
 	}
 
-	if err = allSettings.Validate(storage, ipv6Supported, logger); err != nil {
+	err = allSettings.Validate(storage, ipv6SupportLevel.IsSupported(), logger)
+	if err != nil {
 		return fmt.Errorf("validating settings: %w", err)
 	}
 
@@ -76,16 +81,16 @@ func (c *CLI) OpenvpnConfig(logger OpenvpnConfigLogger, reader *reader.Reader,
 	openvpnFileExtractor := extract.New()
 
 	providers := provider.NewProviders(storage, time.Now, warner, client,
-		unzipper, parallelResolver, ipFetcher, openvpnFileExtractor, allSettings.Updater)
+		unzipper, parallelResolver, ipFetcher, openvpnFileExtractor)
 	providerConf := providers.Get(allSettings.VPN.Provider.Name)
 	connection, err := providerConf.GetConnection(
-		allSettings.VPN.Provider.ServerSelection, ipv6Supported)
+		allSettings.VPN.Provider.ServerSelection, ipv6SupportLevel == netlink.IPv6Internet)
 	if err != nil {
 		return err
 	}
 
 	lines := providerConf.OpenVPNConfig(connection,
-		allSettings.VPN.OpenVPN, ipv6Supported)
+		allSettings.VPN.OpenVPN, ipv6SupportLevel.IsSupported())
 
 	fmt.Println(strings.Join(lines, "\n"))
 	return nil

internal/cli/update.go

@@ -6,7 +6,6 @@ import (
 	"flag"
 	"fmt"
 	"net/http"
-	"slices"
 	"strings"
 	"time"
 
@@ -25,8 +24,6 @@ import (
 var (
 	ErrModeUnspecified     = errors.New("at least one of -enduser or -maintainer must be specified")
 	ErrNoProviderSpecified = errors.New("no provider was specified")
-	ErrUsernameMissing     = errors.New("username is required for this provider")
-	ErrPasswordMissing     = errors.New("password is required for this provider")
 )
 
 type UpdaterLogger interface {
@@ -38,7 +35,7 @@ type UpdaterLogger interface {
 func (c *CLI) Update(ctx context.Context, args []string, logger UpdaterLogger) error {
 	options := settings.Updater{}
 	var endUserMode, maintainerMode, updateAll bool
-	var csvProviders, ipToken, protonUsername, protonPassword string
+	var csvProviders, ipToken string
 	flagSet := flag.NewFlagSet("update", flag.ExitOnError)
 	flagSet.BoolVar(&endUserMode, "enduser", false, "Write results to /gluetun/servers.json (for end users)")
 	flagSet.BoolVar(&maintainerMode, "maintainer", false,
@@ -50,8 +47,6 @@ func (c *CLI) Update(ctx context.Context, args []string, logger UpdaterLogger) e
 	flagSet.BoolVar(&updateAll, "all", false, "Update servers for all VPN providers")
 	flagSet.StringVar(&csvProviders, "providers", "", "CSV string of VPN providers to update server data for")
 	flagSet.StringVar(&ipToken, "ip-token", "", "IP data service token (e.g. ipinfo.io) to use")
-	flagSet.StringVar(&protonUsername, "proton-username", "", "Username to use to authenticate with Proton")
-	flagSet.StringVar(&protonPassword, "proton-password", "", "Password to use to authenticate with Proton")
 	if err := flagSet.Parse(args); err != nil {
 		return err
 	}
@@ -69,11 +64,6 @@ func (c *CLI) Update(ctx context.Context, args []string, logger UpdaterLogger) e
 		options.Providers = strings.Split(csvProviders, ",")
 	}
 
-	if slices.Contains(options.Providers, providers.Protonvpn) {
-		options.ProtonUsername = &protonUsername
-		options.ProtonPassword = &protonPassword
-	}
-
 	options.SetDefaults(options.Providers[0])
 
 	err := options.Validate()
@@ -104,7 +94,7 @@ func (c *CLI) Update(ctx context.Context, args []string, logger UpdaterLogger) e
 	openvpnFileExtractor := extract.New()
 
 	providers := provider.NewProviders(storage, time.Now, logger, httpClient,
-		unzipper, parallelResolver, ipFetcher, openvpnFileExtractor, options)
+		unzipper, parallelResolver, ipFetcher, openvpnFileExtractor)
 
 	updater := updater.New(httpClient, storage, providers, logger)
 	err = updater.UpdateServers(ctx, options.Providers, options.MinRatio)

internal/configuration/settings/dnsblacklist.go

@@ -22,9 +22,6 @@ type DNSBlacklist struct {
 	AddBlockedHosts      []string
 	AddBlockedIPs        []netip.Addr
 	AddBlockedIPPrefixes []netip.Prefix
-	// RebindingProtectionExemptHostnames is a list of hostnames
-	// exempt from DNS rebinding protection.
-	RebindingProtectionExemptHostnames []string
 }
 
 func (b *DNSBlacklist) setDefaults() {
@@ -36,9 +33,8 @@ func (b *DNSBlacklist) setDefaults() {
 var hostRegex = regexp.MustCompile(`^([a-zA-Z0-9]|[a-zA-Z0-9_][a-zA-Z0-9\-_]{0,61}[a-zA-Z0-9_])(\.([a-zA-Z0-9]|[a-zA-Z0-9_][a-zA-Z0-9\-_]{0,61}[a-zA-Z0-9]))*$`) //nolint:lll
 
 var (
-	ErrAllowedHostNotValid                   = errors.New("allowed host is not valid")
+	ErrAllowedHostNotValid = errors.New("allowed host is not valid")
-	ErrBlockedHostNotValid                   = errors.New("blocked host is not valid")
+	ErrBlockedHostNotValid = errors.New("blocked host is not valid")
-	ErrRebindingProtectionExemptHostNotValid = errors.New("rebinding protection exempt host is not valid")
 )
 
 func (b DNSBlacklist) validate() (err error) {
@@ -54,25 +50,18 @@ func (b DNSBlacklist) validate() (err error) {
 		}
 	}
 
-	for _, host := range b.RebindingProtectionExemptHostnames {
-		if !hostRegex.MatchString(host) {
-			return fmt.Errorf("%w: %s", ErrRebindingProtectionExemptHostNotValid, host)
-		}
-	}
-
 	return nil
 }
 
 func (b DNSBlacklist) copy() (copied DNSBlacklist) {
 	return DNSBlacklist{
-		BlockMalicious:                     gosettings.CopyPointer(b.BlockMalicious),
+		BlockMalicious:       gosettings.CopyPointer(b.BlockMalicious),
-		BlockAds:                           gosettings.CopyPointer(b.BlockAds),
+		BlockAds:             gosettings.CopyPointer(b.BlockAds),
-		BlockSurveillance:                  gosettings.CopyPointer(b.BlockSurveillance),
+		BlockSurveillance:    gosettings.CopyPointer(b.BlockSurveillance),
-		AllowedHosts:                       gosettings.CopySlice(b.AllowedHosts),
+		AllowedHosts:         gosettings.CopySlice(b.AllowedHosts),
-		AddBlockedHosts:                    gosettings.CopySlice(b.AddBlockedHosts),
+		AddBlockedHosts:      gosettings.CopySlice(b.AddBlockedHosts),
-		AddBlockedIPs:                      gosettings.CopySlice(b.AddBlockedIPs),
+		AddBlockedIPs:        gosettings.CopySlice(b.AddBlockedIPs),
-		AddBlockedIPPrefixes:               gosettings.CopySlice(b.AddBlockedIPPrefixes),
+		AddBlockedIPPrefixes: gosettings.CopySlice(b.AddBlockedIPPrefixes),
-		RebindingProtectionExemptHostnames: gosettings.CopySlice(b.RebindingProtectionExemptHostnames),
 	}
 }
 
@@ -84,8 +73,6 @@ func (b *DNSBlacklist) overrideWith(other DNSBlacklist) {
 	b.AddBlockedHosts = gosettings.OverrideWithSlice(b.AddBlockedHosts, other.AddBlockedHosts)
 	b.AddBlockedIPs = gosettings.OverrideWithSlice(b.AddBlockedIPs, other.AddBlockedIPs)
 	b.AddBlockedIPPrefixes = gosettings.OverrideWithSlice(b.AddBlockedIPPrefixes, other.AddBlockedIPPrefixes)
-	b.RebindingProtectionExemptHostnames = gosettings.OverrideWithSlice(b.RebindingProtectionExemptHostnames,
-		other.RebindingProtectionExemptHostnames)
 }
 
 func (b DNSBlacklist) ToBlockBuilderSettings(client *http.Client) (
@@ -142,13 +129,6 @@ func (b DNSBlacklist) toLinesNode() (node *gotree.Node) {
 		}
 	}
 
-	if len(b.RebindingProtectionExemptHostnames) > 0 {
-		exemptHostsNode := node.Append("Rebinding protection exempt hostnames:")
-		for _, host := range b.RebindingProtectionExemptHostnames {
-			exemptHostsNode.Append(host)
-		}
-	}
-
 	return node
 }
 
@@ -176,8 +156,6 @@ func (b *DNSBlacklist) read(r *reader.Reader) (err error) {
 
 	b.AllowedHosts = r.CSV("DNS_UNBLOCK_HOSTNAMES", reader.RetroKeys("UNBLOCK"))
 
-	b.RebindingProtectionExemptHostnames = r.CSV("DNS_REBINDING_PROTECTION_EXEMPT_HOSTNAMES")
-
 	return nil
 }
 

internal/configuration/settings/errors.go

@@ -36,8 +36,6 @@ var (
 	ErrSystemPUIDNotValid              = errors.New("process user id is not valid")
 	ErrSystemTimezoneNotValid          = errors.New("timezone is not valid")
 	ErrUpdaterPeriodTooSmall           = errors.New("VPN server data updater period is too small")
-	ErrUpdaterProtonPasswordMissing    = errors.New("proton password is missing")
-	ErrUpdaterProtonUsernameMissing    = errors.New("proton username is missing")
 	ErrVPNProviderNameNotValid         = errors.New("VPN provider name is not valid")
 	ErrVPNTypeNotValid                 = errors.New("VPN type is not valid")
 	ErrWireguardAllowedIPNotSet        = errors.New("allowed IP is not set")

internal/configuration/settings/health.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net/netip"
 	"os"
+	"time"
 
 	"github.com/qdm12/gosettings"
 	"github.com/qdm12/gosettings/reader"
@@ -17,6 +18,12 @@ type Health struct {
 	// for the health check server.
 	// It cannot be the empty string in the internal state.
 	ServerAddress string
+	// ReadHeaderTimeout is the HTTP server header read timeout
+	// duration of the HTTP server. It defaults to 100 milliseconds.
+	ReadHeaderTimeout time.Duration
+	// ReadTimeout is the HTTP read timeout duration of the
+	// HTTP server. It defaults to 500 milliseconds.
+	ReadTimeout time.Duration
 	// TargetAddress is the address (host or host:port)
 	// to TCP TLS dial to periodically for the health check.
 	// It cannot be the empty string in the internal state.
@@ -41,10 +48,12 @@ func (h Health) Validate() (err error) {
 
 func (h *Health) copy() (copied Health) {
 	return Health{
-		ServerAddress: h.ServerAddress,
+		ServerAddress:     h.ServerAddress,
-		TargetAddress: h.TargetAddress,
+		ReadHeaderTimeout: h.ReadHeaderTimeout,
-		ICMPTargetIP:  h.ICMPTargetIP,
+		ReadTimeout:       h.ReadTimeout,
-		RestartVPN:    gosettings.CopyPointer(h.RestartVPN),
+		TargetAddress:     h.TargetAddress,
+		ICMPTargetIP:      h.ICMPTargetIP,
+		RestartVPN:        gosettings.CopyPointer(h.RestartVPN),
 	}
 }
 
@@ -53,6 +62,8 @@ func (h *Health) copy() (copied Health) {
 // settings.
 func (h *Health) OverrideWith(other Health) {
 	h.ServerAddress = gosettings.OverrideWithComparable(h.ServerAddress, other.ServerAddress)
+	h.ReadHeaderTimeout = gosettings.OverrideWithComparable(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
+	h.ReadTimeout = gosettings.OverrideWithComparable(h.ReadTimeout, other.ReadTimeout)
 	h.TargetAddress = gosettings.OverrideWithComparable(h.TargetAddress, other.TargetAddress)
 	h.ICMPTargetIP = gosettings.OverrideWithComparable(h.ICMPTargetIP, other.ICMPTargetIP)
 	h.RestartVPN = gosettings.OverrideWithPointer(h.RestartVPN, other.RestartVPN)
@@ -60,6 +71,10 @@ func (h *Health) OverrideWith(other Health) {
 
 func (h *Health) SetDefaults() {
 	h.ServerAddress = gosettings.DefaultComparable(h.ServerAddress, "127.0.0.1:9999")
+	const defaultReadHeaderTimeout = 100 * time.Millisecond
+	h.ReadHeaderTimeout = gosettings.DefaultComparable(h.ReadHeaderTimeout, defaultReadHeaderTimeout)
+	const defaultReadTimeout = 500 * time.Millisecond
+	h.ReadTimeout = gosettings.DefaultComparable(h.ReadTimeout, defaultReadTimeout)
 	h.TargetAddress = gosettings.DefaultComparable(h.TargetAddress, "cloudflare.com:443")
 	h.ICMPTargetIP = gosettings.DefaultComparable(h.ICMPTargetIP, netip.IPv4Unspecified()) // use the VPN server IP
 	h.RestartVPN = gosettings.DefaultPointer(h.RestartVPN, true)

internal/configuration/settings/ipv6.go

@@ -0,0 +1,51 @@
+package settings
+
+import (
+	"net/netip"
+
+	"github.com/qdm12/gosettings"
+	"github.com/qdm12/gosettings/reader"
+	"github.com/qdm12/gotree"
+)
+
+// IPv6 contains settings regarding IPv6 configuration.
+type IPv6 struct {
+	// CheckAddress is the TCP ip:port address to dial to check
+	// IPv6 is supported, in case a default IPv6 route is found.
+	// It defaults to cloudflare.com address [2606:4700::6810:84e5]:443
+	CheckAddress netip.AddrPort
+}
+
+func (i IPv6) validate() (err error) {
+	return nil
+}
+
+func (i *IPv6) copy() (copied IPv6) {
+	return IPv6{
+		CheckAddress: i.CheckAddress,
+	}
+}
+
+func (i *IPv6) overrideWith(other IPv6) {
+	i.CheckAddress = gosettings.OverrideWithValidator(i.CheckAddress, other.CheckAddress)
+}
+
+func (i *IPv6) setDefaults() {
+	defaultCheckAddress := netip.MustParseAddrPort("[2606:4700::6810:84e5]:443")
+	i.CheckAddress = gosettings.DefaultComparable(i.CheckAddress, defaultCheckAddress)
+}
+
+func (i IPv6) String() string {
+	return i.toLinesNode().String()
+}
+
+func (i IPv6) toLinesNode() (node *gotree.Node) {
+	node = gotree.New("IPv6 settings:")
+	node.Appendf("Check address: %s", i.CheckAddress)
+	return node
+}
+
+func (i *IPv6) read(r *reader.Reader) (err error) {
+	i.CheckAddress, err = r.NetipAddrPort("IPV6_CHECK_ADDRESS")
+	return err
+}

internal/configuration/settings/server.go

@@ -1,14 +1,11 @@
 package settings
 
 import (
-	"bytes"
-	"encoding/json"
 	"fmt"
 	"net"
 	"os"
 	"strconv"
 
-	"github.com/qdm12/gluetun/internal/server/middlewares/auth"
 	"github.com/qdm12/gosettings"
 	"github.com/qdm12/gosettings/reader"
 	"github.com/qdm12/gotree"
@@ -27,9 +24,6 @@ type ControlServer struct {
 	// It cannot be empty in the internal state and defaults to
 	// /gluetun/auth/config.toml.
 	AuthFilePath string
-	// AuthDefaultRole is a JSON encoded object defining the default role
-	// that applies to all routes without a previously user-defined role assigned to.
-	AuthDefaultRole string
 }
 
 func (c ControlServer) validate() (err error) {
@@ -50,30 +44,14 @@ func (c ControlServer) validate() (err error) {
 			ErrControlServerPrivilegedPort, port, uid)
 	}
 
-	jsonDecoder := json.NewDecoder(bytes.NewBufferString(c.AuthDefaultRole))
-	jsonDecoder.DisallowUnknownFields()
-	var role auth.Role
-	err = jsonDecoder.Decode(&role)
-	if err != nil {
-		return fmt.Errorf("default authentication role is not valid JSON: %w", err)
-	}
-
-	if role.Auth != "" {
-		err = role.Validate()
-		if err != nil {
-			return fmt.Errorf("default authentication role is not valid: %w", err)
-		}
-	}
-
 	return nil
 }
 
 func (c *ControlServer) copy() (copied ControlServer) {
 	return ControlServer{
-		Address:         gosettings.CopyPointer(c.Address),
+		Address:      gosettings.CopyPointer(c.Address),
-		Log:             gosettings.CopyPointer(c.Log),
+		Log:          gosettings.CopyPointer(c.Log),
-		AuthFilePath:    c.AuthFilePath,
+		AuthFilePath: c.AuthFilePath,
-		AuthDefaultRole: c.AuthDefaultRole,
 	}
 }
 
@@ -84,21 +62,12 @@ func (c *ControlServer) overrideWith(other ControlServer) {
 	c.Address = gosettings.OverrideWithPointer(c.Address, other.Address)
 	c.Log = gosettings.OverrideWithPointer(c.Log, other.Log)
 	c.AuthFilePath = gosettings.OverrideWithComparable(c.AuthFilePath, other.AuthFilePath)
-	c.AuthDefaultRole = gosettings.OverrideWithComparable(c.AuthDefaultRole, other.AuthDefaultRole)
 }
 
 func (c *ControlServer) setDefaults() {
 	c.Address = gosettings.DefaultPointer(c.Address, ":8000")
 	c.Log = gosettings.DefaultPointer(c.Log, true)
 	c.AuthFilePath = gosettings.DefaultComparable(c.AuthFilePath, "/gluetun/auth/config.toml")
-	c.AuthDefaultRole = gosettings.DefaultComparable(c.AuthDefaultRole, "{}")
-	if c.AuthDefaultRole != "{}" {
-		var role auth.Role
-		_ = json.Unmarshal([]byte(c.AuthDefaultRole), &role)
-		role.Name = "default"
-		roleBytes, _ := json.Marshal(role) //nolint:errchkjson
-		c.AuthDefaultRole = string(roleBytes)
-	}
 }
 
 func (c ControlServer) String() string {
@@ -110,11 +79,6 @@ func (c ControlServer) toLinesNode() (node *gotree.Node) {
 	node.Appendf("Listening address: %s", *c.Address)
 	node.Appendf("Logging: %s", gosettings.BoolToYesNo(c.Log))
 	node.Appendf("Authentication file path: %s", c.AuthFilePath)
-	if c.AuthDefaultRole != "{}" {
-		var role auth.Role
-		_ = json.Unmarshal([]byte(c.AuthDefaultRole), &role)
-		node.AppendNode(role.ToLinesNode())
-	}
 	return node
 }
 
@@ -127,7 +91,6 @@ func (c *ControlServer) read(r *reader.Reader) (err error) {
 	c.Address = r.Get("HTTP_CONTROL_SERVER_ADDRESS")
 
 	c.AuthFilePath = r.String("HTTP_CONTROL_SERVER_AUTH_CONFIG_FILEPATH")
-	c.AuthDefaultRole = r.String("HTTP_CONTROL_SERVER_AUTH_DEFAULT_ROLE")
 
 	return nil
 }

internal/configuration/settings/settings.go

@@ -27,6 +27,7 @@ type Settings struct {
 	Updater       Updater
 	Version       Version
 	VPN           VPN
+	IPv6          IPv6
 	Pprof         pprof.Settings
 }
 
@@ -53,6 +54,7 @@ func (s *Settings) Validate(filterChoicesGetter FilterChoicesGetter, ipv6Support
 		"system":          s.System.validate,
 		"updater":         s.Updater.Validate,
 		"version":         s.Version.validate,
+		"ipv6":            s.IPv6.validate,
 		// Pprof validation done in pprof constructor
 		"VPN": func() error {
 			return s.VPN.Validate(filterChoicesGetter, ipv6Supported, warner)
@@ -85,6 +87,7 @@ func (s *Settings) copy() (copied Settings) {
 		Version:       s.Version.copy(),
 		VPN:           s.VPN.Copy(),
 		Pprof:         s.Pprof.Copy(),
+		IPv6:          s.IPv6.copy(),
 	}
 }
 
@@ -106,6 +109,7 @@ func (s *Settings) OverrideWith(other Settings,
 	patchedSettings.Version.overrideWith(other.Version)
 	patchedSettings.VPN.OverrideWith(other.VPN)
 	patchedSettings.Pprof.OverrideWith(other.Pprof)
+	patchedSettings.IPv6.overrideWith(other.IPv6)
 	err = patchedSettings.Validate(filterChoicesGetter, ipv6Supported, warner)
 	if err != nil {
 		return err
@@ -121,6 +125,7 @@ func (s *Settings) SetDefaults() {
 	s.Health.SetDefaults()
 	s.HTTPProxy.setDefaults()
 	s.Log.setDefaults()
+	s.IPv6.setDefaults()
 	s.PublicIP.setDefaults()
 	s.Shadowsocks.setDefaults()
 	s.Storage.setDefaults()
@@ -142,6 +147,7 @@ func (s Settings) toLinesNode() (node *gotree.Node) {
 	node.AppendNode(s.DNS.toLinesNode())
 	node.AppendNode(s.Firewall.toLinesNode())
 	node.AppendNode(s.Log.toLinesNode())
+	node.AppendNode(s.IPv6.toLinesNode())
 	node.AppendNode(s.Health.toLinesNode())
 	node.AppendNode(s.Shadowsocks.toLinesNode())
 	node.AppendNode(s.HTTPProxy.toLinesNode())
@@ -208,6 +214,7 @@ func (s *Settings) Read(r *reader.Reader, warner Warner) (err error) {
 		"updater":     s.Updater.read,
 		"version":     s.Version.read,
 		"VPN":         s.VPN.read,
+		"IPv6":        s.IPv6.read,
 		"profiling":   s.Pprof.Read,
 	}
 

internal/configuration/settings/settings_test.go

@@ -55,6 +55,8 @@ func Test_Settings_String(t *testing.T) {
 |   └── Enabled: yes
 ├── Log settings:
 |   └── Log level: INFO
+├── IPv6 settings:
+|   └── Check address: [2606:4700::6810:84e5]:443
 ├── Health settings:
 |   ├── Server listening address: 127.0.0.1:9999
 |   ├── Target address: cloudflare.com:443

internal/configuration/settings/updater.go

@@ -2,7 +2,6 @@ package settings
 
 import (
 	"fmt"
-	"slices"
 	"strings"
 	"time"
 
@@ -32,10 +31,6 @@ type Updater struct {
 	// Providers is the list of VPN service providers
 	// to update server information for.
 	Providers []string
-	// ProtonUsername is the username to authenticate with the Proton API.
-	ProtonUsername *string
-	// ProtonPassword is the password to authenticate with the Proton API.
-	ProtonPassword *string
 }
 
 func (u Updater) Validate() (err error) {
@@ -56,18 +51,6 @@ func (u Updater) Validate() (err error) {
 		if err != nil {
 			return fmt.Errorf("%w: %w", ErrVPNProviderNameNotValid, err)
 		}
-
-		if provider == providers.Protonvpn {
-			authenticatedAPI := *u.ProtonUsername != "" || *u.ProtonPassword != ""
-			if authenticatedAPI {
-				switch {
-				case *u.ProtonUsername == "":
-					return fmt.Errorf("%w", ErrUpdaterProtonUsernameMissing)
-				case *u.ProtonPassword == "":
-					return fmt.Errorf("%w", ErrUpdaterProtonPasswordMissing)
-				}
-			}
-		}
 	}
 
 	return nil
@@ -75,12 +58,10 @@ func (u Updater) Validate() (err error) {
 
 func (u *Updater) copy() (copied Updater) {
 	return Updater{
-		Period:         gosettings.CopyPointer(u.Period),
+		Period:     gosettings.CopyPointer(u.Period),
-		DNSAddress:     u.DNSAddress,
+		DNSAddress: u.DNSAddress,
-		MinRatio:       u.MinRatio,
+		MinRatio:   u.MinRatio,
-		Providers:      gosettings.CopySlice(u.Providers),
+		Providers:  gosettings.CopySlice(u.Providers),
-		ProtonUsername: gosettings.CopyPointer(u.ProtonUsername),
-		ProtonPassword: gosettings.CopyPointer(u.ProtonPassword),
 	}
 }
 
@@ -92,8 +73,6 @@ func (u *Updater) overrideWith(other Updater) {
 	u.DNSAddress = gosettings.OverrideWithComparable(u.DNSAddress, other.DNSAddress)
 	u.MinRatio = gosettings.OverrideWithComparable(u.MinRatio, other.MinRatio)
 	u.Providers = gosettings.OverrideWithSlice(u.Providers, other.Providers)
-	u.ProtonUsername = gosettings.OverrideWithPointer(u.ProtonUsername, other.ProtonUsername)
-	u.ProtonPassword = gosettings.OverrideWithPointer(u.ProtonPassword, other.ProtonPassword)
 }
 
 func (u *Updater) SetDefaults(vpnProvider string) {
@@ -108,10 +87,6 @@ func (u *Updater) SetDefaults(vpnProvider string) {
 	if len(u.Providers) == 0 && vpnProvider != providers.Custom {
 		u.Providers = []string{vpnProvider}
 	}
-
-	// Set these to empty strings to avoid nil pointer panics
-	u.ProtonUsername = gosettings.DefaultPointer(u.ProtonUsername, "")
-	u.ProtonPassword = gosettings.DefaultPointer(u.ProtonPassword, "")
 }
 
 func (u Updater) String() string {
@@ -128,10 +103,6 @@ func (u Updater) toLinesNode() (node *gotree.Node) {
 	node.Appendf("DNS address: %s", u.DNSAddress)
 	node.Appendf("Minimum ratio: %.1f", u.MinRatio)
 	node.Appendf("Providers to update: %s", strings.Join(u.Providers, ", "))
-	if slices.Contains(u.Providers, providers.Protonvpn) {
-		node.Appendf("Proton API username: %s", *u.ProtonUsername)
-		node.Appendf("Proton API password: %s", gosettings.ObfuscateKey(*u.ProtonPassword))
-	}
 
 	return node
 }
@@ -154,14 +125,6 @@ func (u *Updater) read(r *reader.Reader) (err error) {
 
 	u.Providers = r.CSV("UPDATER_VPN_SERVICE_PROVIDERS")
 
-	u.ProtonUsername = r.Get("UPDATER_PROTONVPN_USERNAME")
-	if u.ProtonUsername != nil {
-		// Enforce to use the username not the email address
-		*u.ProtonUsername = strings.TrimSuffix(*u.ProtonUsername, "@protonmail.com")
-		*u.ProtonUsername = strings.TrimSuffix(*u.ProtonUsername, "@proton.me")
-	}
-	u.ProtonPassword = r.Get("UPDATER_PROTONVPN_PASSWORD")
-
 	return nil
 }
 

internal/configuration/settings/wireguardselection.go

@@ -155,8 +155,7 @@ func (w WireguardSelection) toLinesNode() (node *gotree.Node) {
 func (w *WireguardSelection) read(r *reader.Reader) (err error) {
 	w.EndpointIP, err = r.NetipAddr("WIREGUARD_ENDPOINT_IP", reader.RetroKeys("VPN_ENDPOINT_IP"))
 	if err != nil {
-		return fmt.Errorf("%w - note this MUST be an IP address, "+
+		return err
-			"see https://github.com/qdm12/gluetun/issues/788", err)
 	}
 
 	w.EndpointPort, err = r.Uint16Ptr("WIREGUARD_ENDPOINT_PORT", reader.RetroKeys("VPN_ENDPOINT_PORT"))

internal/dns/loop.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"net/http"
-	"net/netip"
 	"time"
 
 	"github.com/qdm12/dns/v2/pkg/middlewares/filter/mapfilter"
@@ -17,23 +16,22 @@ import (
 )
 
 type Loop struct {
-	statusManager  *loopstate.State
+	statusManager *loopstate.State
-	state          *state.State
+	state         *state.State
-	server         *server.Server
+	server        *server.Server
-	filter         *mapfilter.Filter
+	filter        *mapfilter.Filter
-	localResolvers []netip.Addr
+	resolvConf    string
-	resolvConf     string
+	client        *http.Client
-	client         *http.Client
+	logger        Logger
-	logger         Logger
+	userTrigger   bool
-	userTrigger    bool
+	start         <-chan struct{}
-	start          <-chan struct{}
+	running       chan<- models.LoopStatus
-	running        chan<- models.LoopStatus
+	stop          <-chan struct{}
-	stop           <-chan struct{}
+	stopped       chan<- struct{}
-	stopped        chan<- struct{}
+	updateTicker  <-chan struct{}
-	updateTicker   <-chan struct{}
+	backoffTime   time.Duration
-	backoffTime    time.Duration
+	timeNow       func() time.Time
-	timeNow        func() time.Time
+	timeSince     func(time.Time) time.Duration
-	timeSince      func(time.Time) time.Duration
 }
 
 const defaultBackoffTime = 10 * time.Second
@@ -50,9 +48,7 @@ func NewLoop(settings settings.DNS,
 	statusManager := loopstate.New(constants.Stopped, start, running, stop, stopped)
 	state := state.New(statusManager, settings, updateTicker)
 
-	filter, err := mapfilter.New(mapfilter.Settings{
+	filter, err := mapfilter.New(mapfilter.Settings{})
-		Logger: buildFilterLogger(logger),
-	})
 	if err != nil {
 		return nil, fmt.Errorf("creating map filter: %w", err)
 	}
@@ -104,15 +100,3 @@ func (l *Loop) signalOrSetStatus(status models.LoopStatus) {
 		l.statusManager.SetStatus(status)
 	}
 }
-
-type filterLogger struct {
-	logger Logger
-}
-
-func (l *filterLogger) Log(msg string) {
-	l.logger.Info(msg)
-}
-
-func buildFilterLogger(logger Logger) *filterLogger {
-	return &filterLogger{logger: logger}
-}

internal/dns/run.go

@@ -4,20 +4,12 @@ import (
 	"context"
 	"errors"
 
-	"github.com/qdm12/dns/v2/pkg/nameserver"
 	"github.com/qdm12/gluetun/internal/constants"
 )
 
 func (l *Loop) Run(ctx context.Context, done chan<- struct{}) {
 	defer close(done)
 
-	var err error
-	l.localResolvers, err = nameserver.GetPrivateDNSServers()
-	if err != nil {
-		l.logger.Error("getting private DNS servers: " + err.Error())
-		return
-	}
-
 	if *l.GetSettings().KeepNameserver {
 		l.logger.Warn("⚠️⚠️⚠️  keeping the default container nameservers, " +
 			"this will likely leak DNS traffic outside the VPN " +

internal/dns/settings.go

@@ -3,7 +3,6 @@ package dns
 import (
 	"context"
 	"fmt"
-	"net/netip"
 
 	"github.com/qdm12/dns/v2/pkg/doh"
 	"github.com/qdm12/dns/v2/pkg/dot"
@@ -11,7 +10,6 @@ import (
 	"github.com/qdm12/dns/v2/pkg/middlewares/cache/lru"
 	filtermiddleware "github.com/qdm12/dns/v2/pkg/middlewares/filter"
 	"github.com/qdm12/dns/v2/pkg/middlewares/filter/mapfilter"
-	"github.com/qdm12/dns/v2/pkg/middlewares/localdns"
 	"github.com/qdm12/dns/v2/pkg/plain"
 	"github.com/qdm12/dns/v2/pkg/provider"
 	"github.com/qdm12/dns/v2/pkg/server"
@@ -27,8 +25,7 @@ func (l *Loop) SetSettings(ctx context.Context, settings settings.DNS) (
 }
 
 func buildServerSettings(settings settings.DNS,
-	filter *mapfilter.Filter, localResolvers []netip.Addr,
+	filter *mapfilter.Filter, logger Logger) (
-	logger Logger) (
 	serverSettings server.Settings, err error,
 ) {
 	serverSettings.Logger = logger
@@ -104,22 +101,5 @@ func buildServerSettings(settings settings.DNS,
 	}
 	serverSettings.Middlewares = append(serverSettings.Middlewares, filterMiddleware)
 
-	localResolversAddrPorts := make([]netip.AddrPort, len(localResolvers))
-	const defaultDNSPort = 53
-	for i, addr := range localResolvers {
-		localResolversAddrPorts[i] = netip.AddrPortFrom(addr, defaultDNSPort)
-	}
-	localDNSMiddleware, err := localdns.New(localdns.Settings{
-		Resolvers: localResolversAddrPorts, // auto-detected at container start only
-		Logger:    logger,
-	})
-	if err != nil {
-		return server.Settings{}, fmt.Errorf("creating local DNS middleware: %w", err)
-	}
-	// Place after cache middleware, since we want to avoid caching for local
-	// hostnames that may change regularly.
-	// Place after filter middleware to avoid conflicts with the rebinding protection.
-	serverSettings.Middlewares = append(serverSettings.Middlewares, localDNSMiddleware)
-
 	return serverSettings, nil
 }

internal/dns/setup.go

@@ -21,7 +21,7 @@ func (l *Loop) setupServer(ctx context.Context) (runError <-chan error, err erro
 
 	settings := l.GetSettings()
 
-	serverSettings, err := buildServerSettings(settings, l.filter, l.localResolvers, l.logger)
+	serverSettings, err := buildServerSettings(settings, l.filter, l.logger)
 	if err != nil {
 		return nil, fmt.Errorf("building server settings: %w", err)
 	}

internal/dns/update.go

@@ -37,7 +37,6 @@ func (l *Loop) updateFiles(ctx context.Context) (err error) {
 		IPPrefixes: result.BlockedIPPrefixes,
 	}
 	updateSettings.BlockHostnames(result.BlockedHostnames)
-	updateSettings.SetRebindingProtectionExempt(settings.Blacklist.RebindingProtectionExemptHostnames)
 	err = l.filter.Update(updateSettings)
 	if err != nil {
 		return fmt.Errorf("updating filter: %w", err)

internal/firewall/iptables.go

@@ -162,6 +162,24 @@ func (c *Config) acceptOutputTrafficToVPN(ctx context.Context,
 	return c.runIP6tablesInstruction(ctx, instruction)
 }
 
+func (c *Config) AcceptOutput(ctx context.Context,
+	protocol, intf string, ip netip.Addr, port uint16, remove bool,
+) error {
+	interfaceFlag := "-o " + intf
+	if intf == "*" { // all interfaces
+		interfaceFlag = ""
+	}
+
+	instruction := fmt.Sprintf("%s OUTPUT -d %s %s -p %s -m %s --dport %d -j ACCEPT",
+		appendOrDelete(remove), ip, interfaceFlag, protocol, protocol, port)
+	if ip.Is4() {
+		return c.runIptablesInstruction(ctx, instruction)
+	} else if c.ip6Tables == "" {
+		return fmt.Errorf("accept output to VPN server: %w", ErrNeedIP6Tables)
+	}
+	return c.runIP6tablesInstruction(ctx, instruction)
+}
+
 // Thanks to @npawelek.
 func (c *Config) acceptOutputFromIPToSubnet(ctx context.Context,
 	intf string, sourceIP netip.Addr, destinationSubnet netip.Prefix, remove bool,

internal/healthcheck/dns/dns.go

@@ -44,12 +44,12 @@ func concatAddrPorts(addrs [][]netip.AddrPort) []netip.AddrPort {
 var ErrLookupNoIPs = errors.New("no IPs found from DNS lookup")
 
 func (c *Client) Check(ctx context.Context) error {
-	dnsAddr := c.serverAddrs[c.dnsIPIndex].String()
+	dnsAddr := c.serverAddrs[c.dnsIPIndex].Addr()
 	resolver := &net.Resolver{
 		PreferGo: true,
 		Dial: func(ctx context.Context, _, _ string) (net.Conn, error) {
 			dialer := net.Dialer{}
-			return dialer.DialContext(ctx, "udp", dnsAddr)
+			return dialer.DialContext(ctx, "udp", dnsAddr.String())
 		},
 	}
 	ips, err := resolver.LookupIP(ctx, "ip", "github.com")

internal/healthcheck/run.go

@@ -10,13 +10,11 @@ import (
 func (s *Server) Run(ctx context.Context, done chan<- struct{}) {
 	defer close(done)
 
-	const readHeaderTimeout = 100 * time.Millisecond
-	const readTimeout = 500 * time.Millisecond
 	server := http.Server{
 		Addr:              s.config.ServerAddress,
 		Handler:           s.handler,
-		ReadHeaderTimeout: readHeaderTimeout,
+		ReadHeaderTimeout: s.config.ReadHeaderTimeout,
-		ReadTimeout:       readTimeout,
+		ReadTimeout:       s.config.ReadTimeout,
 	}
 	serverDone := make(chan struct{})
 	go func() {

internal/netlink/interfaces.go

@@ -1,9 +1,19 @@
 package netlink
 
-import "github.com/qdm12/log"
+import (
+	"context"
+	"net/netip"
+
+	"github.com/qdm12/log"
+)
 
 type DebugLogger interface {
 	Debug(message string)
 	Debugf(format string, args ...any)
 	Patch(options ...log.Option)
 }
+
+type Firewall interface {
+	AcceptOutput(ctx context.Context, protocol, intf string, ip netip.Addr,
+		port uint16, remove bool) (err error)
+}

internal/netlink/ipv6.go

@@ -1,37 +1,106 @@
 package netlink
 
 import (
+	"context"
 	"fmt"
+	"net"
+	"net/netip"
+	"time"
 )
 
-func (n *NetLink) IsIPv6Supported() (supported bool, err error) {
+type IPv6SupportLevel uint8
+
+const (
+	IPv6Unsupported = iota
+	// IPv6Supported indicates the host supports IPv6 but has no access to the
+	// Internet via IPv6. It is true if one IPv6 route is found and no default
+	// IPv6 route is found.
+	IPv6Supported
+	// IPv6Internet indicates the host has access to the Internet via IPv6,
+	// which is detected when a default IPv6 route is found.
+	IPv6Internet
+)
+
+func (i IPv6SupportLevel) IsSupported() bool {
+	return i == IPv6Supported || i == IPv6Internet
+}
+
+func (n *NetLink) FindIPv6SupportLevel(ctx context.Context,
+	checkAddress netip.AddrPort, firewall Firewall,
+) (level IPv6SupportLevel, err error) {
 	routes, err := n.RouteList(FamilyV6)
 	if err != nil {
-		return false, fmt.Errorf("listing IPv6 routes: %w", err)
+		return IPv6Unsupported, fmt.Errorf("listing IPv6 routes: %w", err)
 	}
 
 	// Check each route for IPv6 due to Podman bug listing IPv4 routes
 	// as IPv6 routes at container start, see:
 	// https://github.com/qdm12/gluetun/issues/1241#issuecomment-1333405949
+	level = IPv6Unsupported
 	for _, route := range routes {
 		link, err := n.LinkByIndex(route.LinkIndex)
 		if err != nil {
-			return false, fmt.Errorf("finding link corresponding to route: %w", err)
+			return IPv6Unsupported, fmt.Errorf("finding link corresponding to route: %w", err)
 		}
 
-		sourceIsIPv6 := route.Src.IsValid() && route.Src.Is6()
+		sourceIsIPv4 := route.Src.IsValid() && route.Src.Is4()
+		destinationIsIPv4 := route.Dst.IsValid() && route.Dst.Addr().Is4()
 		destinationIsIPv6 := route.Dst.IsValid() && route.Dst.Addr().Is6()
 		switch {
-		case !sourceIsIPv6 && !destinationIsIPv6,
+		case sourceIsIPv4 && destinationIsIPv4,
 			destinationIsIPv6 && route.Dst.Addr().IsLoopback():
-			continue
+		case route.Dst.Addr().IsUnspecified(): // default ipv6 route
+			n.debugLogger.Debugf("IPv6 default route found on link %s", link.Name)
+			err = dialAddrThroughFirewall(ctx, link.Name, checkAddress, firewall)
+			if err != nil {
+				n.debugLogger.Debugf("IPv6 query failed on %s: %w", link.Name, err)
+				level = IPv6Supported
+				continue
+			}
+			n.debugLogger.Debugf("IPv6 internet is accessible through link %s", link.Name)
+			return IPv6Internet, nil
+		default: // non-default ipv6 route found
+			n.debugLogger.Debugf("IPv6 is supported by link %s", link.Name)
+			level = IPv6Supported
 		}
-
-		n.debugLogger.Debugf("IPv6 is supported by link %s", link.Name)
-		return true, nil
 	}
 
-	n.debugLogger.Debugf("IPv6 is not supported after searching %d routes",
+	if level == IPv6Unsupported {
-		len(routes))
+		n.debugLogger.Debugf("no IPv6 route found in %d routes", len(routes))
-	return false, nil
+	}
+	return level, nil
+}
+
+func dialAddrThroughFirewall(ctx context.Context, intf string,
+	checkAddress netip.AddrPort, firewall Firewall,
+) (err error) {
+	const protocol = "tcp"
+	remove := false
+	err = firewall.AcceptOutput(ctx, protocol, intf,
+		checkAddress.Addr(), checkAddress.Port(), remove)
+	if err != nil {
+		return fmt.Errorf("accepting output traffic: %w", err)
+	}
+	defer func() {
+		remove = true
+		firewallErr := firewall.AcceptOutput(ctx, protocol, intf,
+			checkAddress.Addr(), checkAddress.Port(), remove)
+		if err == nil && firewallErr != nil {
+			err = fmt.Errorf("removing output traffic rule: %w", firewallErr)
+		}
+	}()
+
+	dialer := &net.Dialer{
+		Timeout: time.Second,
+	}
+	conn, err := dialer.DialContext(ctx, protocol, checkAddress.String())
+	if err != nil {
+		return fmt.Errorf("dialing: %w", err)
+	}
+	err = conn.Close()
+	if err != nil {
+		return fmt.Errorf("closing connection: %w", err)
+	}
+
+	return nil
 }

internal/netlink/ipv6_test.go

@@ -0,0 +1,167 @@
+package netlink
+
+import (
+	"context"
+	"errors"
+	"net"
+	"net/netip"
+	"strings"
+	"testing"
+	"time"
+
+	gomock "github.com/golang/mock/gomock"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func isIPv6LocallySupported() bool {
+	dialer := net.Dialer{Timeout: time.Millisecond}
+	_, err := dialer.Dial("tcp6", "[::1]:9999")
+	return !strings.HasSuffix(err.Error(), "connect: cannot assign requested address")
+}
+
+// Susceptible to TOCTOU but it should be fine for the use case.
+func findAvailableTCPPort(t *testing.T) (port uint16) {
+	t.Helper()
+
+	config := &net.ListenConfig{}
+	listener, err := config.Listen(context.Background(), "tcp", "localhost:0")
+	require.NoError(t, err)
+
+	addr := listener.Addr().String()
+	err = listener.Close()
+	require.NoError(t, err)
+
+	addrPort, err := netip.ParseAddrPort(addr)
+	require.NoError(t, err)
+
+	return addrPort.Port()
+}
+
+func Test_dialAddrThroughFirewall(t *testing.T) {
+	t.Parallel()
+
+	errTest := errors.New("test error")
+
+	const ipv6InternetWorks = false
+
+	testCases := map[string]struct {
+		getIPv6CheckAddr  func(t *testing.T) netip.AddrPort
+		firewallAddErr    error
+		firewallRemoveErr error
+		errMessageRegex   func() string
+	}{
+		"cloudflare.com": {
+			getIPv6CheckAddr: func(_ *testing.T) netip.AddrPort {
+				return netip.MustParseAddrPort("[2606:4700::6810:84e5]:443")
+			},
+			errMessageRegex: func() string {
+				if ipv6InternetWorks {
+					return ""
+				}
+				return "dialing: dial tcp \\[2606:4700::6810:84e5\\]:443: " +
+					"connect: (cannot assign requested address|network is unreachable)"
+			},
+		},
+		"local_server": {
+			getIPv6CheckAddr: func(t *testing.T) netip.AddrPort {
+				t.Helper()
+
+				network := "tcp6"
+				loopback := netip.MustParseAddr("::1")
+				if !isIPv6LocallySupported() {
+					network = "tcp4"
+					loopback = netip.MustParseAddr("127.0.0.1")
+				}
+
+				listener, err := net.ListenTCP(network, nil)
+				require.NoError(t, err)
+				t.Cleanup(func() {
+					err := listener.Close()
+					require.NoError(t, err)
+				})
+				addrPort := netip.MustParseAddrPort(listener.Addr().String())
+				return netip.AddrPortFrom(loopback, addrPort.Port())
+			},
+		},
+		"no_local_server": {
+			getIPv6CheckAddr: func(t *testing.T) netip.AddrPort {
+				t.Helper()
+
+				loopback := netip.MustParseAddr("::1")
+				if !ipv6InternetWorks {
+					loopback = netip.MustParseAddr("127.0.0.1")
+				}
+
+				availablePort := findAvailableTCPPort(t)
+				return netip.AddrPortFrom(loopback, availablePort)
+			},
+			errMessageRegex: func() string {
+				return "dialing: dial tcp (\\[::1\\]|127\\.0\\.0\\.1):[1-9][0-9]{1,4}: " +
+					"connect: connection refused"
+			},
+		},
+		"firewall_add_error": {
+			firewallAddErr: errTest,
+			errMessageRegex: func() string {
+				return "accepting output traffic: test error"
+			},
+		},
+		"firewall_remove_error": {
+			getIPv6CheckAddr: func(t *testing.T) netip.AddrPort {
+				t.Helper()
+
+				network := "tcp4"
+				loopback := netip.MustParseAddr("127.0.0.1")
+				listener, err := net.ListenTCP(network, nil)
+				require.NoError(t, err)
+				t.Cleanup(func() {
+					err := listener.Close()
+					require.NoError(t, err)
+				})
+				addrPort := netip.MustParseAddrPort(listener.Addr().String())
+				return netip.AddrPortFrom(loopback, addrPort.Port())
+			},
+			firewallRemoveErr: errTest,
+			errMessageRegex: func() string {
+				return "removing output traffic rule: test error"
+			},
+		},
+	}
+
+	for name, testCase := range testCases {
+		t.Run(name, func(t *testing.T) {
+			t.Parallel()
+			ctrl := gomock.NewController(t)
+
+			var checkAddr netip.AddrPort
+			if testCase.getIPv6CheckAddr != nil {
+				checkAddr = testCase.getIPv6CheckAddr(t)
+			}
+
+			ctx := context.Background()
+			const intf = "eth0"
+			firewall := NewMockFirewall(ctrl)
+			call := firewall.EXPECT().AcceptOutput(ctx, "tcp", intf,
+				checkAddr.Addr(), checkAddr.Port(), false).
+				Return(testCase.firewallAddErr)
+			if testCase.firewallAddErr == nil {
+				firewall.EXPECT().AcceptOutput(ctx, "tcp", intf,
+					checkAddr.Addr(), checkAddr.Port(), true).
+					Return(testCase.firewallRemoveErr).After(call)
+			}
+
+			err := dialAddrThroughFirewall(ctx, intf, checkAddr, firewall)
+			var errMessageRegex string
+			if testCase.errMessageRegex != nil {
+				errMessageRegex = testCase.errMessageRegex()
+			}
+			if errMessageRegex == "" {
+				assert.NoError(t, err)
+			} else {
+				require.Error(t, err)
+				assert.Regexp(t, errMessageRegex, err.Error())
+			}
+		})
+	}
+}

internal/netlink/mocks_generate_test.go

@@ -0,0 +1,3 @@
+package netlink
+
+//go:generate mockgen -destination=mocks_test.go -package=$GOPACKAGE . Firewall

internal/netlink/mocks_test.go

@@ -0,0 +1,50 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: github.com/qdm12/gluetun/internal/netlink (interfaces: Firewall)
+
+// Package netlink is a generated GoMock package.
+package netlink
+
+import (
+	context "context"
+	netip "net/netip"
+	reflect "reflect"
+
+	gomock "github.com/golang/mock/gomock"
+)
+
+// MockFirewall is a mock of Firewall interface.
+type MockFirewall struct {
+	ctrl     *gomock.Controller
+	recorder *MockFirewallMockRecorder
+}
+
+// MockFirewallMockRecorder is the mock recorder for MockFirewall.
+type MockFirewallMockRecorder struct {
+	mock *MockFirewall
+}
+
+// NewMockFirewall creates a new mock instance.
+func NewMockFirewall(ctrl *gomock.Controller) *MockFirewall {
+	mock := &MockFirewall{ctrl: ctrl}
+	mock.recorder = &MockFirewallMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockFirewall) EXPECT() *MockFirewallMockRecorder {
+	return m.recorder
+}
+
+// AcceptOutput mocks base method.
+func (m *MockFirewall) AcceptOutput(arg0 context.Context, arg1, arg2 string, arg3 netip.Addr, arg4 uint16, arg5 bool) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "AcceptOutput", arg0, arg1, arg2, arg3, arg4, arg5)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// AcceptOutput indicates an expected call of AcceptOutput.
+func (mr *MockFirewallMockRecorder) AcceptOutput(arg0, arg1, arg2, arg3, arg4, arg5 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AcceptOutput", reflect.TypeOf((*MockFirewall)(nil).AcceptOutput), arg0, arg1, arg2, arg3, arg4, arg5)
+}

internal/portforward/service/fs.go

@@ -14,11 +14,7 @@ func (s *Service) writePortForwardedFile(ports []uint16) (err error) {
 	fileData := []byte(strings.Join(portStrings, "\n"))
 
 	filepath := s.settings.Filepath
-	if len(ports) == 0 {
+	s.logger.Info("writing port file " + filepath)
-		s.logger.Info("clearing port file " + filepath)
-	} else {
-		s.logger.Info("writing port file " + filepath)
-	}
 	const perms = os.FileMode(0o644)
 	err = os.WriteFile(filepath, fileData, perms)
 	if err != nil {

internal/portforward/service/stop.go

@@ -59,6 +59,8 @@ func (s *Service) cleanup() (err error) {
 
 	s.ports = nil
 
+	filepath := s.settings.Filepath
+	s.logger.Info("clearing port file " + filepath)
 	err = s.writePortForwardedFile(nil)
 	if err != nil {
 		return fmt.Errorf("clearing port file: %w", err)

internal/provider/common/updater.go

@@ -13,7 +13,6 @@ var (
 	ErrNotEnoughServers     = errors.New("not enough servers found")
 	ErrHTTPStatusCodeNotOK  = errors.New("HTTP status code not OK")
 	ErrIPFetcherUnsupported = errors.New("IP fetcher not supported")
-	ErrCredentialsMissing   = errors.New("credentials missing")
 )
 
 type Fetcher interface {

internal/provider/protonvpn/provider.go

@@ -18,12 +18,11 @@ type Provider struct {
 
 func New(storage common.Storage, randSource rand.Source,
 	client *http.Client, updaterWarner common.Warner,
-	username, password string,
 ) *Provider {
 	return &Provider{
 		storage:    storage,
 		randSource: randSource,
-		Fetcher:    updater.New(client, updaterWarner, username, password),
+		Fetcher:    updater.New(client, updaterWarner),
 	}
 }
 

internal/provider/protonvpn/updater/api.go

@@ -1,567 +1,15 @@
 package updater
 
 import (
-	"bytes"
 	"context"
-	crand "crypto/rand"
-	"encoding/base64"
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io"
-	"math/rand/v2"
 	"net/http"
 	"net/netip"
-	"slices"
-	"strings"
-
-	srp "github.com/ProtonMail/go-srp"
 )
 
-// apiClient is a minimal Proton v4 API client which can handle all the
+var ErrHTTPStatusCodeNotOK = errors.New("HTTP status code not OK")
-// oddities of Proton's authentication flow they want to keep hidden
-// from the public.
-type apiClient struct {
-	apiURLBase string
-	httpClient *http.Client
-	appVersion string
-	userAgent  string
-	generator  *rand.ChaCha8
-}
-
-// newAPIClient returns an [apiClient] with sane defaults matching Proton's
-// insane expectations.
-func newAPIClient(ctx context.Context, httpClient *http.Client) (client *apiClient, err error) {
-	var seed [32]byte
-	_, _ = crand.Read(seed[:])
-	generator := rand.NewChaCha8(seed)
-
-	// Pick a random user agent from this list. Because I'm not going to tell
-	// Proton shit on where all these funny requests are coming from, given their
-	// unhelpfulness in figuring out their authentication flow.
-	userAgents := [...]string{
-		"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:143.0) Gecko/20100101 Firefox/143.0",
-		"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:143.0) Gecko/20100101 Firefox/143.0",
-		"Mozilla/5.0 (X11; Linux x86_64; rv:143.0) Gecko/20100101 Firefox/143.0",
-	}
-	userAgent := userAgents[generator.Uint64()%uint64(len(userAgents))]
-
-	appVersion, err := getMostRecentStableTag(ctx, httpClient)
-	if err != nil {
-		return nil, fmt.Errorf("getting most recent version for proton app: %w", err)
-	}
-
-	return &apiClient{
-		apiURLBase: "https://account.proton.me/api",
-		httpClient: httpClient,
-		appVersion: appVersion,
-		userAgent:  userAgent,
-		generator:  generator,
-	}, nil
-}
-
-var ErrCodeNotSuccess = errors.New("response code is not success")
-
-// setHeaders sets the minimal necessary headers for Proton API requests
-// to succeed without being blocked by their "security" measures.
-// See for example [getMostRecentStableTag] on how the app version must
-// be set to a recent version or they block your request. "SeCuRiTy"...
-func (c *apiClient) setHeaders(request *http.Request, cookie cookie) {
-	request.Header.Set("Cookie", cookie.String())
-	request.Header.Set("User-Agent", c.userAgent)
-	request.Header.Set("x-pm-appversion", c.appVersion)
-	request.Header.Set("x-pm-locale", "en_US")
-	request.Header.Set("x-pm-uid", cookie.uid)
-}
-
-// authenticate performs the full Proton authentication flow
-// to obtain an authenticated cookie (uid, token and session ID).
-func (c *apiClient) authenticate(ctx context.Context, username, password string,
-) (authCookie cookie, err error) {
-	sessionID, err := c.getSessionID(ctx)
-	if err != nil {
-		return cookie{}, fmt.Errorf("getting session ID: %w", err)
-	}
-
-	tokenType, accessToken, refreshToken, uid, err := c.getUnauthSession(ctx, sessionID)
-	if err != nil {
-		return cookie{}, fmt.Errorf("getting unauthenticated session data: %w", err)
-	}
-
-	cookieToken, err := c.cookieToken(ctx, sessionID, tokenType, accessToken, refreshToken, uid)
-	if err != nil {
-		return cookie{}, fmt.Errorf("getting cookie token: %w", err)
-	}
-
-	unauthCookie := cookie{
-		uid:       uid,
-		token:     cookieToken,
-		sessionID: sessionID,
-	}
-	modulusPGPClearSigned, serverEphemeralBase64, saltBase64,
-		srpSessionHex, version, err := c.authInfo(ctx, username, unauthCookie)
-	if err != nil {
-		return cookie{}, fmt.Errorf("getting auth information: %w", err)
-	}
-
-	// Prepare SRP proof generator using Proton's official SRP parameters and hashing.
-	srpAuth, err := srp.NewAuth(version, username, []byte(password),
-		saltBase64, modulusPGPClearSigned, serverEphemeralBase64)
-	if err != nil {
-		return cookie{}, fmt.Errorf("initializing SRP auth: %w", err)
-	}
-
-	// Generate SRP proofs (A, M1) with the usual 2048-bit modulus.
-	const modulusBits = 2048
-	proofs, err := srpAuth.GenerateProofs(modulusBits)
-	if err != nil {
-		return cookie{}, fmt.Errorf("generating SRP proofs: %w", err)
-	}
-
-	authCookie, err = c.auth(ctx, unauthCookie, username, srpSessionHex, proofs)
-	if err != nil {
-		return cookie{}, fmt.Errorf("authentifying: %w", err)
-	}
-
-	return authCookie, nil
-}
-
-var ErrSessionIDNotFound = errors.New("session ID not found in cookies")
-
-func (c *apiClient) getSessionID(ctx context.Context) (sessionID string, err error) {
-	const url = "https://account.proton.me/vpn"
-	request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
-	if err != nil {
-		return "", fmt.Errorf("creating request: %w", err)
-	}
-
-	response, err := c.httpClient.Do(request)
-	if err != nil {
-		return "", err
-	}
-	err = response.Body.Close()
-	if err != nil {
-		return "", fmt.Errorf("closing response body: %w", err)
-	}
-
-	for _, cookie := range response.Cookies() {
-		if cookie.Name == "Session-Id" {
-			return cookie.Value, nil
-		}
-	}
-
-	return "", fmt.Errorf("%w", ErrSessionIDNotFound)
-}
-
-var ErrDataFieldMissing = errors.New("data field missing in response")
-
-func (c *apiClient) getUnauthSession(ctx context.Context, sessionID string) (
-	tokenType, accessToken, refreshToken, uid string, err error,
-) {
-	request, err := http.NewRequestWithContext(ctx, http.MethodPost, c.apiURLBase+"/auth/v4/sessions", nil)
-	if err != nil {
-		return "", "", "", "", fmt.Errorf("creating request: %w", err)
-	}
-	unauthCookie := cookie{
-		sessionID: sessionID,
-	}
-	c.setHeaders(request, unauthCookie)
-
-	response, err := c.httpClient.Do(request)
-	if err != nil {
-		return "", "", "", "", err
-	}
-	defer response.Body.Close()
-
-	responseBody, err := io.ReadAll(response.Body)
-	if err != nil {
-		return "", "", "", "", fmt.Errorf("reading response body: %w", err)
-	} else if response.StatusCode != http.StatusOK {
-		return "", "", "", "", buildError(response.StatusCode, responseBody)
-	}
-
-	var data struct {
-		Code         uint     `json:"Code"`         // 1000 on success
-		AccessToken  string   `json:"AccessToken"`  // 32-chars lowercase and digits
-		RefreshToken string   `json:"RefreshToken"` // 32-chars lowercase and digits
-		TokenType    string   `json:"TokenType"`    // "Bearer"
-		Scopes       []string `json:"Scopes"`       // should be [] for our usage
-		UID          string   `json:"UID"`          // 32-chars lowercase and digits
-		LocalID      uint     `json:"LocalID"`      // 0 in my case
-	}
-
-	err = json.Unmarshal(responseBody, &data)
-	if err != nil {
-		return "", "", "", "", fmt.Errorf("decoding response body: %w", err)
-	}
-
-	const successCode = 1000
-	switch {
-	case data.Code != successCode:
-		return "", "", "", "", fmt.Errorf("%w: expected %d got %d",
-			ErrCodeNotSuccess, successCode, data.Code)
-	case data.AccessToken == "":
-		return "", "", "", "", fmt.Errorf("%w: access token is empty", ErrDataFieldMissing)
-	case data.RefreshToken == "":
-		return "", "", "", "", fmt.Errorf("%w: refresh token is empty", ErrDataFieldMissing)
-	case data.TokenType == "":
-		return "", "", "", "", fmt.Errorf("%w: token type is empty", ErrDataFieldMissing)
-	case data.UID == "":
-		return "", "", "", "", fmt.Errorf("%w: UID is empty", ErrDataFieldMissing)
-	}
-	// Ignore Scopes and LocalID fields, we don't use them.
-
-	return data.TokenType, data.AccessToken, data.RefreshToken, data.UID, nil
-}
-
-var ErrUIDMismatch = errors.New("UID in response does not match request UID")
-
-func (c *apiClient) cookieToken(ctx context.Context, sessionID, tokenType, accessToken,
-	refreshToken, uid string,
-) (cookieToken string, err error) {
-	type requestBodySchema struct {
-		GrantType    string `json:"GrantType"`    // "refresh_token"
-		Persistent   uint   `json:"Persistent"`   // 0
-		RedirectURI  string `json:"RedirectURI"`  // "https://protonmail.com"
-		RefreshToken string `json:"RefreshToken"` // 32-chars lowercase and digits
-		ResponseType string `json:"ResponseType"` // "token"
-		State        string `json:"State"`        // 24-chars letters and digits
-		UID          string `json:"UID"`          // 32-chars lowercase and digits
-	}
-	requestBody := requestBodySchema{
-		GrantType:    "refresh_token",
-		Persistent:   0,
-		RedirectURI:  "https://protonmail.com",
-		RefreshToken: refreshToken,
-		ResponseType: "token",
-		State:        generateLettersDigits(c.generator, 24), //nolint:mnd
-		UID:          uid,
-	}
-
-	buffer := bytes.NewBuffer(nil)
-	encoder := json.NewEncoder(buffer)
-	if err := encoder.Encode(requestBody); err != nil {
-		return "", fmt.Errorf("encoding request body: %w", err)
-	}
-
-	request, err := http.NewRequestWithContext(ctx, http.MethodPost, c.apiURLBase+"/core/v4/auth/cookies", buffer)
-	if err != nil {
-		return "", fmt.Errorf("creating request: %w", err)
-	}
-	unauthCookie := cookie{
-		uid:       uid,
-		sessionID: sessionID,
-	}
-	c.setHeaders(request, unauthCookie)
-	request.Header.Set("Authorization", tokenType+" "+accessToken)
-
-	response, err := c.httpClient.Do(request)
-	if err != nil {
-		return "", err
-	}
-	defer response.Body.Close()
-
-	responseBody, err := io.ReadAll(response.Body)
-	if err != nil {
-		return "", fmt.Errorf("reading response body: %w", err)
-	} else if response.StatusCode != http.StatusOK {
-		return "", buildError(response.StatusCode, responseBody)
-	}
-
-	var cookies struct {
-		Code           uint   `json:"Code"`           // 1000 on success
-		UID            string `json:"UID"`            // should match request UID
-		LocalID        uint   `json:"LocalID"`        // 0
-		RefreshCounter uint   `json:"RefreshCounter"` // 1
-	}
-	err = json.Unmarshal(responseBody, &cookies)
-	if err != nil {
-		return "", fmt.Errorf("decoding response body: %w", err)
-	}
-
-	const successCode = 1000
-	switch {
-	case cookies.Code != successCode:
-		return "", fmt.Errorf("%w: expected %d got %d",
-			ErrCodeNotSuccess, successCode, cookies.Code)
-	case cookies.UID != requestBody.UID:
-		return "", fmt.Errorf("%w: expected %s got %s",
-			ErrUIDMismatch, requestBody.UID, cookies.UID)
-	}
-	// Ignore LocalID and RefreshCounter fields, we don't use them.
-
-	for _, cookie := range response.Cookies() {
-		if cookie.Name == "AUTH-"+uid {
-			return cookie.Value, nil
-		}
-	}
-
-	return "", fmt.Errorf("%w", ErrAuthCookieNotFound)
-}
-
-var (
-	ErrUsernameDoesNotExist = errors.New("username does not exist")
-	ErrUsernameMismatch     = errors.New("username in response does not match request username")
-)
-
-// authInfo fetches SRP parameters for the account.
-func (c *apiClient) authInfo(ctx context.Context, username string, unauthCookie cookie) (
-	modulusPGPClearSigned, serverEphemeralBase64, saltBase64, srpSessionHex string,
-	version int, err error,
-) {
-	type requestBodySchema struct {
-		Intent   string `json:"Intent"`   // "Proton"
-		Username string `json:"Username"` // username without @domain.com
-	}
-	requestBody := requestBodySchema{
-		Intent:   "Proton",
-		Username: username,
-	}
-
-	buffer := bytes.NewBuffer(nil)
-	encoder := json.NewEncoder(buffer)
-	if err := encoder.Encode(requestBody); err != nil {
-		return "", "", "", "", 0, fmt.Errorf("encoding request body: %w", err)
-	}
-
-	request, err := http.NewRequestWithContext(ctx, http.MethodPost, c.apiURLBase+"/core/v4/auth/info", buffer)
-	if err != nil {
-		return "", "", "", "", 0, fmt.Errorf("creating request: %w", err)
-	}
-	c.setHeaders(request, unauthCookie)
-
-	response, err := c.httpClient.Do(request)
-	if err != nil {
-		return "", "", "", "", 0, err
-	}
-	defer response.Body.Close()
-
-	responseBody, err := io.ReadAll(response.Body)
-	if err != nil {
-		return "", "", "", "", 0, fmt.Errorf("reading response body: %w", err)
-	} else if response.StatusCode != http.StatusOK {
-		return "", "", "", "", 0, buildError(response.StatusCode, responseBody)
-	}
-
-	var info struct {
-		Code            uint   `json:"Code"`              // 1000 on success
-		Modulus         string `json:"Modulus"`           // PGP clearsigned modulus string
-		ServerEphemeral string `json:"ServerEphemeral"`   // base64
-		Version         *uint  `json:"Version,omitempty"` // 4 as of 2025-10-26
-		Salt            string `json:"Salt"`              // base64
-		SRPSession      string `json:"SRPSession"`        // hexadecimal
-		Username        string `json:"Username"`          // user without @domain.com. Mine has its first letter capitalized.
-	}
-	err = json.Unmarshal(responseBody, &info)
-	if err != nil {
-		return "", "", "", "", 0, fmt.Errorf("decoding response body: %w", err)
-	}
-
-	const successCode = 1000
-	switch {
-	case info.Code != successCode:
-		return "", "", "", "", 0, fmt.Errorf("%w: expected %d got %d",
-			ErrCodeNotSuccess, successCode, info.Code)
-	case info.Modulus == "":
-		return "", "", "", "", 0, fmt.Errorf("%w: modulus is empty", ErrDataFieldMissing)
-	case info.ServerEphemeral == "":
-		return "", "", "", "", 0, fmt.Errorf("%w: server ephemeral is empty", ErrDataFieldMissing)
-	case info.Salt == "":
-		return "", "", "", "", 0, fmt.Errorf("%w (salt data field is empty)", ErrUsernameDoesNotExist)
-	case info.SRPSession == "":
-		return "", "", "", "", 0, fmt.Errorf("%w: SRP session is empty", ErrDataFieldMissing)
-
-	case info.Username != username:
-		return "", "", "", "", 0, fmt.Errorf("%w: expected %s got %s",
-			ErrUsernameMismatch, username, info.Username)
-	case info.Version == nil:
-		return "", "", "", "", 0, fmt.Errorf("%w: version is missing", ErrDataFieldMissing)
-	}
-
-	version = int(*info.Version) //nolint:gosec
-	return info.Modulus, info.ServerEphemeral, info.Salt,
-		info.SRPSession, version, nil
-}
-
-type cookie struct {
-	uid       string
-	token     string
-	sessionID string
-}
-
-func (c *cookie) String() string {
-	s := ""
-	if c.token != "" {
-		s += fmt.Sprintf("AUTH-%s=%s; ", c.uid, c.token)
-	}
-	if c.sessionID != "" {
-		s += fmt.Sprintf("Session-Id=%s; ", c.sessionID)
-	}
-	if c.token != "" {
-		s += "Tag=default; iaas=W10; Domain=proton.me; Feature=VPNDashboard:A"
-	}
-	return s
-}
-
-var (
-	// ErrServerProofNotValid indicates the M2 from the server didn't match the expected proof.
-	ErrServerProofNotValid = errors.New("server proof from server is not valid")
-	ErrVPNScopeNotFound    = errors.New("VPN scope not found in scopes")
-	ErrTwoFANotSupported   = errors.New("two factor authentication not supported in this client")
-	ErrAuthCookieNotFound  = errors.New("auth cookie not found")
-)
-
-// auth performs the SRP proof submission (and optionally TOTP) to obtain tokens.
-func (c *apiClient) auth(ctx context.Context, unauthCookie cookie,
-	username, srpSession string, proofs *srp.Proofs,
-) (authCookie cookie, err error) {
-	clientEphemeral := base64.StdEncoding.EncodeToString(proofs.ClientEphemeral)
-	clientProof := base64.StdEncoding.EncodeToString(proofs.ClientProof)
-
-	type requestBodySchema struct {
-		ClientEphemeral string            `json:"ClientEphemeral"`   // base64(A)
-		ClientProof     string            `json:"ClientProof"`       // base64(M1)
-		Payload         map[string]string `json:"Payload,omitempty"` // not sure
-		SRPSession      string            `json:"SRPSession"`        // hexadecimal
-		Username        string            `json:"Username"`          // user@protonmail.com
-	}
-	requestBody := requestBodySchema{
-		ClientEphemeral: clientEphemeral,
-		ClientProof:     clientProof,
-		SRPSession:      srpSession,
-		Username:        username,
-	}
-
-	buffer := bytes.NewBuffer(nil)
-	encoder := json.NewEncoder(buffer)
-	if err := encoder.Encode(requestBody); err != nil {
-		return cookie{}, fmt.Errorf("encoding request body: %w", err)
-	}
-
-	request, err := http.NewRequestWithContext(ctx, http.MethodPost, c.apiURLBase+"/core/v4/auth", buffer)
-	if err != nil {
-		return cookie{}, fmt.Errorf("creating request: %w", err)
-	}
-	c.setHeaders(request, unauthCookie)
-
-	response, err := c.httpClient.Do(request)
-	if err != nil {
-		return cookie{}, err
-	}
-	defer response.Body.Close()
-
-	responseBody, err := io.ReadAll(response.Body)
-	if err != nil {
-		return cookie{}, fmt.Errorf("reading response body: %w", err)
-	} else if response.StatusCode != http.StatusOK {
-		return cookie{}, buildError(response.StatusCode, responseBody)
-	}
-
-	type twoFAStatus uint
-	//nolint:unused
-	const (
-		twoFADisabled twoFAStatus = iota
-		twoFAHasTOTP
-		twoFAHasFIDO2
-		twoFAHasFIDO2AndTOTP
-	)
-	type twoFAInfo struct {
-		Enabled twoFAStatus `json:"Enabled"`
-		FIDO2   struct {
-			AuthenticationOptions any   `json:"AuthenticationOptions"`
-			RegisteredKeys        []any `json:"RegisteredKeys"`
-		} `json:"FIDO2"`
-		TOTP uint `json:"TOTP"`
-	}
-
-	var auth struct {
-		Code              uint      `json:"Code"`         // 1000 on success
-		LocalID           uint      `json:"LocalID"`      // 7 in my case
-		Scopes            []string  `json:"Scopes"`       // this should contain "vpn". Same as `Scope` field value.
-		UID               string    `json:"UID"`          // same as `Uid` field value
-		UserID            string    `json:"UserID"`       // base64
-		EventID           string    `json:"EventID"`      // base64
-		PasswordMode      uint      `json:"PasswordMode"` // 1 in my case
-		ServerProof       string    `json:"ServerProof"`  // base64(M2)
-		TwoFactor         uint      `json:"TwoFactor"`    // 0 if 2FA not required
-		TwoFA             twoFAInfo `json:"2FA"`
-		TemporaryPassword uint      `json:"TemporaryPassword"` // 0 in my case
-	}
-
-	err = json.Unmarshal(responseBody, &auth)
-	if err != nil {
-		return cookie{}, fmt.Errorf("decoding response body: %w", err)
-	}
-
-	m2, err := base64.StdEncoding.DecodeString(auth.ServerProof)
-	if err != nil {
-		return cookie{}, fmt.Errorf("decoding server proof: %w", err)
-	}
-	if !bytes.Equal(m2, proofs.ExpectedServerProof) {
-		return cookie{}, fmt.Errorf("%w: expected %x got %x",
-			ErrServerProofNotValid, proofs.ExpectedServerProof, m2)
-	}
-
-	const successCode = 1000
-	switch {
-	case auth.Code != successCode:
-		return cookie{}, fmt.Errorf("%w: expected %d got %d",
-			ErrCodeNotSuccess, successCode, auth.Code)
-	case auth.UID != unauthCookie.uid:
-		return cookie{}, fmt.Errorf("%w: expected %s got %s",
-			ErrUIDMismatch, unauthCookie.uid, auth.UID)
-	case auth.TwoFactor != 0:
-		return cookie{}, fmt.Errorf("%w", ErrTwoFANotSupported)
-	case !slices.Contains(auth.Scopes, "vpn"):
-		return cookie{}, fmt.Errorf("%w: in %v", ErrVPNScopeNotFound, auth.Scopes)
-	}
-
-	for _, setCookieHeader := range response.Header.Values("Set-Cookie") {
-		parts := strings.Split(setCookieHeader, ";")
-		for _, part := range parts {
-			if strings.HasPrefix(part, "AUTH-"+unauthCookie.uid+"=") {
-				authCookie = unauthCookie
-				authCookie.token = strings.TrimPrefix(part, "AUTH-"+unauthCookie.uid+"=")
-				return authCookie, nil
-			}
-		}
-	}
-
-	return cookie{}, fmt.Errorf("%w: in HTTP headers %s",
-		ErrAuthCookieNotFound, httpHeadersToString(response.Header))
-}
-
-// generateLettersDigits mimicing Proton's own random string generator:
-// https://github.com/ProtonMail/WebClients/blob/e4d7e4ab9babe15b79a131960185f9f8275512cd/packages/utils/generateLettersDigits.ts
-func generateLettersDigits(rng *rand.ChaCha8, length uint) string {
-	const charset = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
-	return generateFromCharset(rng, length, charset)
-}
-
-func generateFromCharset(rng *rand.ChaCha8, length uint, charset string) string {
-	result := make([]byte, length)
-	randomBytes := make([]byte, length)
-	_, _ = rng.Read(randomBytes)
-	for i := range length {
-		result[i] = charset[int(randomBytes[i])%len(charset)]
-	}
-	return string(result)
-}
-
-func httpHeadersToString(headers http.Header) string {
-	var builder strings.Builder
-	first := true
-	for key, values := range headers {
-		for _, value := range values {
-			if !first {
-				builder.WriteString(", ")
-			}
-			builder.WriteString(fmt.Sprintf("%s: %s", key, value))
-			first = false
-		}
-	}
-	return builder.String()
-}
 
 type apiData struct {
 	LogicalServers []logicalServer `json:"LogicalServers"`
@@ -585,25 +33,25 @@ type physicalServer struct {
 	X25519PublicKey string     `json:"X25519PublicKey"`
 }
 
-func (c *apiClient) fetchServers(ctx context.Context, cookie cookie) (
+func fetchAPI(ctx context.Context, client *http.Client) (
 	data apiData, err error,
 ) {
-	const url = "https://account.proton.me/api/vpn/logicals"
+	const url = "https://api.protonmail.ch/vpn/logicals"
+
 	request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
 	if err != nil {
 		return data, err
 	}
-	c.setHeaders(request, cookie)
 
-	response, err := c.httpClient.Do(request)
+	response, err := client.Do(request)
 	if err != nil {
 		return data, err
 	}
 	defer response.Body.Close()
 
 	if response.StatusCode != http.StatusOK {
-		b, _ := io.ReadAll(response.Body)
+		return data, fmt.Errorf("%w: %d %s", ErrHTTPStatusCodeNotOK,
-		return data, buildError(response.StatusCode, b)
+			response.StatusCode, response.Status)
 	}
 
 	decoder := json.NewDecoder(response.Body)
@@ -611,31 +59,9 @@ func (c *apiClient) fetchServers(ctx context.Context, cookie cookie) (
 		return data, fmt.Errorf("decoding response body: %w", err)
 	}
 
+	if err := response.Body.Close(); err != nil {
+		return data, err
+	}
+
 	return data, nil
 }
-
-var ErrHTTPStatusCodeNotOK = errors.New("HTTP status code not OK")
-
-func buildError(httpCode int, body []byte) error {
-	prettyCode := http.StatusText(httpCode)
-	var protonError struct {
-		Code    *int              `json:"Code,omitempty"`
-		Error   *string           `json:"Error,omitempty"`
-		Details map[string]string `json:"Details"`
-	}
-	decoder := json.NewDecoder(bytes.NewReader(body))
-	decoder.DisallowUnknownFields()
-	err := decoder.Decode(&protonError)
-	if err != nil || protonError.Error == nil || protonError.Code == nil {
-		return fmt.Errorf("%w: %s: %s",
-			ErrHTTPStatusCodeNotOK, prettyCode, body)
-	}
-
-	details := make([]string, 0, len(protonError.Details))
-	for key, value := range protonError.Details {
-		details = append(details, fmt.Sprintf("%s: %s", key, value))
-	}
-
-	return fmt.Errorf("%w: %s: %s (code %d with details: %s)",
-		ErrHTTPStatusCodeNotOK, prettyCode, *protonError.Error, *protonError.Code, strings.Join(details, ", "))
-}

internal/provider/protonvpn/updater/servers.go

@@ -13,26 +13,9 @@ import (
 func (u *Updater) FetchServers(ctx context.Context, minServers int) (
 	servers []models.Server, err error,
 ) {
-	switch {
+	data, err := fetchAPI(ctx, u.client)
-	case u.username == "":
-		return nil, fmt.Errorf("%w: username is empty", common.ErrCredentialsMissing)
-	case u.password == "":
-		return nil, fmt.Errorf("%w: password is empty", common.ErrCredentialsMissing)
-	}
-
-	apiClient, err := newAPIClient(ctx, u.client)
 	if err != nil {
-		return nil, fmt.Errorf("creating API client: %w", err)
+		return nil, err
-	}
-
-	cookie, err := apiClient.authenticate(ctx, u.username, u.password)
-	if err != nil {
-		return nil, fmt.Errorf("authentifying with Proton: %w", err)
-	}
-
-	data, err := apiClient.fetchServers(ctx, cookie)
-	if err != nil {
-		return nil, fmt.Errorf("fetching logical servers: %w", err)
 	}
 
 	countryCodes := constants.CountryCodes()

internal/provider/protonvpn/updater/updater.go

@@ -7,17 +7,13 @@ import (
 )
 
 type Updater struct {
-	client   *http.Client
+	client *http.Client
-	username string
+	warner common.Warner
-	password string
-	warner   common.Warner
 }
 
-func New(client *http.Client, warner common.Warner, username, password string) *Updater {
+func New(client *http.Client, warner common.Warner) *Updater {
 	return &Updater{
-		client:   client,
+		client: client,
-		username: username,
+		warner: warner,
-		password: password,
-		warner:   warner,
 	}
 }

internal/provider/protonvpn/updater/version.go

@@ -1,64 +0,0 @@
-package updater
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"io"
-	"net/http"
-	"regexp"
-	"strings"
-)
-
-// getMostRecentStableTag finds the most recent proton-account stable tag version,
-// in order to use it in the x-pm-appversion http request header. Because if we do
-// fall behind on versioning, Proton doesn't like it because they like to create
-// complications where there is no need for it. Hence this function.
-func getMostRecentStableTag(ctx context.Context, client *http.Client) (version string, err error) {
-	page := 1
-	regexVersion := regexp.MustCompile(`^proton-account@(\d+\.\d+\.\d+\.\d+)$`)
-	for ctx.Err() == nil {
-		url := "https://api.github.com/repos/ProtonMail/WebClients/tags?per_page=30&page=" + fmt.Sprint(page)
-
-		request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
-		if err != nil {
-			return "", fmt.Errorf("creating request: %w", err)
-		}
-		request.Header.Set("Accept", "application/vnd.github.v3+json")
-
-		response, err := client.Do(request)
-		if err != nil {
-			return "", err
-		}
-		defer response.Body.Close()
-
-		data, err := io.ReadAll(response.Body)
-		if err != nil {
-			return "", fmt.Errorf("reading response body: %w", err)
-		}
-
-		if response.StatusCode != http.StatusOK {
-			return "", fmt.Errorf("%w: %s: %s", ErrHTTPStatusCodeNotOK, response.Status, data)
-		}
-
-		var tags []struct {
-			Name string `json:"name"`
-		}
-		err = json.Unmarshal(data, &tags)
-		if err != nil {
-			return "", fmt.Errorf("decoding JSON response: %w", err)
-		}
-
-		for _, tag := range tags {
-			if !regexVersion.MatchString(tag.Name) {
-				continue
-			}
-			version := "web-account@" + strings.TrimPrefix(tag.Name, "proton-account@")
-			return version, nil
-		}
-
-		page++
-	}
-
-	return "", fmt.Errorf("%w (queried %d pages)", context.Canceled, page)
-}

internal/provider/providers.go

@@ -54,7 +54,7 @@ type Extractor interface {
 func NewProviders(storage Storage, timeNow func() time.Time,
 	updaterWarner common.Warner, client *http.Client, unzipper common.Unzipper,
 	parallelResolver common.ParallelResolver, ipFetcher common.IPFetcher,
-	extractor custom.Extractor, credentials settings.Updater,
+	extractor custom.Extractor,
 ) *Providers {
 	randSource := rand.NewSource(timeNow().UnixNano())
 
@@ -75,7 +75,7 @@ func NewProviders(storage Storage, timeNow func() time.Time,
 		providers.Privado:               privado.New(storage, randSource, ipFetcher, unzipper, updaterWarner, parallelResolver),
 		providers.PrivateInternetAccess: privateinternetaccess.New(storage, randSource, timeNow, client),
 		providers.Privatevpn:            privatevpn.New(storage, randSource, unzipper, updaterWarner, parallelResolver),
-		providers.Protonvpn:             protonvpn.New(storage, randSource, client, updaterWarner, *credentials.ProtonUsername, *credentials.ProtonPassword),
+		providers.Protonvpn:             protonvpn.New(storage, randSource, client, updaterWarner),
 		providers.Purevpn:               purevpn.New(storage, randSource, ipFetcher, unzipper, updaterWarner, parallelResolver),
 		providers.SlickVPN:              slickvpn.New(storage, randSource, client, updaterWarner, parallelResolver),
 		providers.Surfshark:             surfshark.New(storage, randSource, client, unzipper, updaterWarner, parallelResolver),

internal/server/handler.go

@@ -25,14 +25,13 @@ func newHandler(ctx context.Context, logger Logger, logging bool,
 	handler := &handler{}
 
 	vpn := newVPNHandler(ctx, vpnLooper, storage, ipv6Supported, logger)
-	openvpn := newOpenvpnHandler(ctx, vpnLooper, logger)
+	openvpn := newOpenvpnHandler(ctx, vpnLooper, pfGetter, logger)
 	dns := newDNSHandler(ctx, dnsLooper, logger)
 	updater := newUpdaterHandler(ctx, updaterLooper, logger)
 	publicip := newPublicIPHandler(publicIPLooper, logger)
-	portForward := newPortForwardHandler(ctx, pfGetter, logger)
 
 	handler.v0 = newHandlerV0(ctx, logger, vpnLooper, dnsLooper, updaterLooper)
-	handler.v1 = newHandlerV1(logger, buildInfo, vpn, openvpn, dns, updater, publicip, portForward)
+	handler.v1 = newHandlerV1(logger, buildInfo, vpn, openvpn, dns, updater, publicip)
 
 	authMiddleware, err := auth.New(authSettings, logger)
 	if err != nil {

internal/server/handlerv0.go

@@ -52,7 +52,7 @@ func (h *handlerV0) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			h.logger.Warn(err.Error())
 		}
 	case "/openvpn/portforwarded":
-		http.Redirect(w, r, "/v1/portforward", http.StatusPermanentRedirect)
+		http.Redirect(w, r, "/v1/openvpn/portforwarded", http.StatusPermanentRedirect)
 	case "/openvpn/settings":
 		http.Redirect(w, r, "/v1/openvpn/settings", http.StatusPermanentRedirect)
 	case "/updater/restart":

internal/server/handlerv1.go

@@ -10,29 +10,27 @@ import (
 )
 
 func newHandlerV1(w warner, buildInfo models.BuildInformation,
-	vpn, openvpn, dns, updater, publicip, portForward http.Handler,
+	vpn, openvpn, dns, updater, publicip http.Handler,
 ) http.Handler {
 	return &handlerV1{
-		warner:      w,
+		warner:    w,
-		buildInfo:   buildInfo,
+		buildInfo: buildInfo,
-		vpn:         vpn,
+		vpn:       vpn,
-		openvpn:     openvpn,
+		openvpn:   openvpn,
-		dns:         dns,
+		dns:       dns,
-		updater:     updater,
+		updater:   updater,
-		publicip:    publicip,
+		publicip:  publicip,
-		portForward: portForward,
 	}
 }
 
 type handlerV1 struct {
-	warner      warner
+	warner    warner
-	buildInfo   models.BuildInformation
+	buildInfo models.BuildInformation
-	vpn         http.Handler
+	vpn       http.Handler
-	openvpn     http.Handler
+	openvpn   http.Handler
-	dns         http.Handler
+	dns       http.Handler
-	updater     http.Handler
+	updater   http.Handler
-	publicip    http.Handler
+	publicip  http.Handler
-	portForward http.Handler
 }
 
 func (h *handlerV1) ServeHTTP(w http.ResponseWriter, r *http.Request) {
@@ -49,8 +47,6 @@ func (h *handlerV1) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		h.updater.ServeHTTP(w, r)
 	case strings.HasPrefix(r.RequestURI, "/publicip"):
 		h.publicip.ServeHTTP(w, r)
-	case strings.HasPrefix(r.RequestURI, "/portforward"):
-		h.portForward.ServeHTTP(w, r)
 	default:
 		errString := fmt.Sprintf("%s %s not found", r.Method, r.RequestURI)
 		http.Error(w, errString, http.StatusBadRequest)

internal/server/middlewares/auth/middleware.go

@@ -18,15 +18,35 @@ func New(settings Settings, debugLogger DebugLogger) (
 		return &authHandler{
 			childHandler: handler,
 			routeToRoles: routeToRoles,
-			logger:       debugLogger,
+			unprotectedRoutes: map[string]struct{}{
+				http.MethodGet + " /openvpn/actions/restart": {},
+				http.MethodGet + " /unbound/actions/restart": {},
+				http.MethodGet + " /updater/restart":         {},
+				http.MethodGet + " /v1/version":              {},
+				http.MethodGet + " /v1/vpn/status":           {},
+				http.MethodPut + " /v1/vpn/status":           {},
+				// GET /v1/vpn/settings is protected by default
+				// PUT /v1/vpn/settings is protected by default
+				http.MethodGet + " /v1/openvpn/status":        {},
+				http.MethodPut + " /v1/openvpn/status":        {},
+				http.MethodGet + " /v1/openvpn/portforwarded": {},
+				// GET /v1/openvpn/settings is protected by default
+				http.MethodGet + " /v1/dns/status":     {},
+				http.MethodPut + " /v1/dns/status":     {},
+				http.MethodGet + " /v1/updater/status": {},
+				http.MethodPut + " /v1/updater/status": {},
+				http.MethodGet + " /v1/publicip/ip":    {},
+			},
+			logger: debugLogger,
 		}
 	}, nil
 }
 
 type authHandler struct {
-	childHandler http.Handler
+	childHandler      http.Handler
-	routeToRoles map[string][]internalRole
+	routeToRoles      map[string][]internalRole
-	logger       DebugLogger
+	unprotectedRoutes map[string]struct{} // TODO v3.41.0 remove
+	logger            DebugLogger
 }
 
 func (h *authHandler) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
@@ -44,6 +64,8 @@ func (h *authHandler) ServeHTTP(writer http.ResponseWriter, request *http.Reques
 			continue
 		}
 
+		h.warnIfUnprotectedByDefault(role, route) // TODO v3.41.0 remove
+
 		h.logger.Debugf("access to route %s authorized for role %s", route, role.name)
 		h.childHandler.ServeHTTP(writer, request)
 		return
@@ -64,3 +86,26 @@ func (h *authHandler) ServeHTTP(writer http.ResponseWriter, request *http.Reques
 		route, andStrings(allRoleNames))
 	http.Error(writer, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
 }
+
+func (h *authHandler) warnIfUnprotectedByDefault(role internalRole, route string) {
+	// TODO v3.41.0 remove
+	if role.name != "public" {
+		// custom role name, allow none authentication to be specified
+		return
+	}
+	_, isNoneChecker := role.checker.(*noneMethod)
+	if !isNoneChecker {
+		// not the none authentication method
+		return
+	}
+	_, isUnprotectedByDefault := h.unprotectedRoutes[route]
+	if !isUnprotectedByDefault {
+		// route is not unprotected by default, so this is a user decision
+		return
+	}
+	h.logger.Warnf("route %s is unprotected by default, "+
+		"please set up authentication following the documentation at "+
+		"https://github.com/qdm12/gluetun-wiki/blob/main/setup/advanced/control-server.md#authentication "+
+		"since this will become no longer publicly accessible after release v3.40.",
+		route)
+}

internal/server/middlewares/auth/middleware_test.go

@@ -40,6 +40,27 @@ func Test_authHandler_ServeHTTP(t *testing.T) {
 			statusCode:    http.StatusUnauthorized,
 			responseBody:  "Unauthorized\n",
 		},
+		"authorized_unprotected_by_default": {
+			settings: Settings{
+				Roles: []Role{
+					{Name: "public", Auth: AuthNone, Routes: []string{"GET /v1/vpn/status"}},
+				},
+			},
+			makeLogger: func(ctrl *gomock.Controller) *MockDebugLogger {
+				logger := NewMockDebugLogger(ctrl)
+				logger.EXPECT().Warnf("route %s is unprotected by default, "+
+					"please set up authentication following the documentation at "+
+					"https://github.com/qdm12/gluetun-wiki/blob/main/setup/advanced/control-server.md#authentication "+
+					"since this will become no longer publicly accessible after release v3.40.",
+					"GET /v1/vpn/status")
+				logger.EXPECT().Debugf("access to route %s authorized for role %s",
+					"GET /v1/vpn/status", "public")
+				return logger
+			},
+			requestMethod: http.MethodGet,
+			requestPath:   "/v1/vpn/status",
+			statusCode:    http.StatusOK,
+		},
 		"authorized_none": {
 			settings: Settings{
 				Roles: []Role{

internal/server/middlewares/auth/settings.go

@@ -1,16 +1,12 @@
 package auth
 
 import (
-	"bytes"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"net/http"
-	"slices"
 
 	"github.com/qdm12/gosettings"
 	"github.com/qdm12/gosettings/validate"
-	"github.com/qdm12/gotree"
 )
 
 type Settings struct {
@@ -19,53 +15,32 @@ type Settings struct {
 	Roles []Role
 }
 
-// SetDefaultRole sets a default role to apply to all routes without a
+func (s *Settings) SetDefaults() {
-// previously user-defined role assigned to. Note the role argument
+	s.Roles = gosettings.DefaultSlice(s.Roles, []Role{{ // TODO v3.41.0 leave empty
-// routes are ignored. This should be called BEFORE calling [Settings.SetDefaults].
+		Name: "public",
-func (s *Settings) SetDefaultRole(jsonRole string) error {
+		Auth: "none",
-	var role Role
+		Routes: []string{
-	decoder := json.NewDecoder(bytes.NewBufferString(jsonRole))
+			http.MethodGet + " /openvpn/actions/restart",
-	decoder.DisallowUnknownFields()
+			http.MethodGet + " /unbound/actions/restart",
-	err := decoder.Decode(&role)
+			http.MethodGet + " /updater/restart",
-	if err != nil {
+			http.MethodGet + " /v1/version",
-		return fmt.Errorf("decoding default role: %w", err)
+			http.MethodGet + " /v1/vpn/status",
-	}
+			http.MethodPut + " /v1/vpn/status",
-	if role.Auth == "" {
+			http.MethodGet + " /v1/openvpn/status",
-		return nil // no default role to set
+			http.MethodPut + " /v1/openvpn/status",
-	}
+			http.MethodGet + " /v1/openvpn/portforwarded",
-	err = role.Validate()
+			http.MethodGet + " /v1/dns/status",
-	if err != nil {
+			http.MethodPut + " /v1/dns/status",
-		return fmt.Errorf("validating default role: %w", err)
+			http.MethodGet + " /v1/updater/status",
-	}
+			http.MethodPut + " /v1/updater/status",
-
+			http.MethodGet + " /v1/publicip/ip",
-	authenticatedRoutes := make(map[string]struct{}, len(validRoutes))
+		},
-	for _, role := range s.Roles {
+	}})
-		for _, route := range role.Routes {
-			authenticatedRoutes[route] = struct{}{}
-		}
-	}
-
-	if len(authenticatedRoutes) == len(validRoutes) {
-		return nil
-	}
-
-	unauthenticatedRoutes := make([]string, 0, len(validRoutes))
-	for route := range validRoutes {
-		_, authenticated := authenticatedRoutes[route]
-		if !authenticated {
-			unauthenticatedRoutes = append(unauthenticatedRoutes, route)
-		}
-	}
-
-	slices.Sort(unauthenticatedRoutes)
-	role.Routes = unauthenticatedRoutes
-	s.Roles = append(s.Roles, role)
-	return nil
 }
 
 func (s Settings) Validate() (err error) {
 	for i, role := range s.Roles {
-		err = role.Validate()
+		err = role.validate()
 		if err != nil {
 			return fmt.Errorf("role %s (%d of %d): %w",
 				role.Name, i+1, len(s.Roles), err)
@@ -86,18 +61,18 @@ const (
 type Role struct {
 	// Name is the role name and is only used for documentation
 	// and in the authentication middleware debug logs.
-	Name string `json:"name"`
+	Name string
-	// Auth is the authentication method to use, which can be 'none', 'basic' or 'apikey'.
+	// Auth is the authentication method to use, which can be 'none' or 'apikey'.
-	Auth string `json:"auth"`
+	Auth string
 	// APIKey is the API key to use when using the 'apikey' authentication.
-	APIKey string `json:"apikey"`
+	APIKey string
 	// Username for HTTP Basic authentication method.
-	Username string `json:"username"`
+	Username string
 	// Password for HTTP Basic authentication method.
-	Password string `json:"password"`
+	Password string
 	// Routes is a list of routes that the role can access in the format
 	// "HTTP_METHOD PATH", for example "GET /v1/vpn/status"
-	Routes []string `json:"-"`
+	Routes []string
 }
 
 var (
@@ -108,7 +83,7 @@ var (
 	ErrRouteNotSupported  = errors.New("route not supported by the control server")
 )
 
-func (r Role) Validate() (err error) {
+func (r Role) validate() (err error) {
 	err = validate.IsOneOf(r.Auth, AuthNone, AuthAPIKey, AuthBasic)
 	if err != nil {
 		return fmt.Errorf("%w: %s", ErrMethodNotSupported, r.Auth)
@@ -137,8 +112,6 @@ func (r Role) Validate() (err error) {
 // WARNING: do not mutate programmatically.
 var validRoutes = map[string]struct{}{ //nolint:gochecknoglobals
 	http.MethodGet + " /openvpn/actions/restart":  {},
-	http.MethodGet + " /openvpn/portforwarded":    {},
-	http.MethodGet + " /openvpn/settings":         {},
 	http.MethodGet + " /unbound/actions/restart":  {},
 	http.MethodGet + " /updater/restart":          {},
 	http.MethodGet + " /v1/version":               {},
@@ -155,22 +128,4 @@ var validRoutes = map[string]struct{}{ //nolint:gochecknoglobals
 	http.MethodGet + " /v1/updater/status":        {},
 	http.MethodPut + " /v1/updater/status":        {},
 	http.MethodGet + " /v1/publicip/ip":           {},
-	http.MethodGet + " /v1/portforward":           {},
-}
-
-func (r Role) ToLinesNode() (node *gotree.Node) {
-	node = gotree.New("Role " + r.Name)
-	node.Appendf("Authentication method: %s", r.Auth)
-	switch r.Auth {
-	case AuthNone:
-	case AuthBasic:
-		node.Appendf("Username: %s", r.Username)
-		node.Appendf("Password: %s", gosettings.ObfuscateKey(r.Password))
-	case AuthAPIKey:
-		node.Appendf("API key: %s", gosettings.ObfuscateKey(r.APIKey))
-	default:
-		panic("missing code for authentication method: " + r.Auth)
-	}
-	node.Appendf("Number of routes covered: %d", len(r.Routes))
-	return node
 }

internal/server/middlewares/log/middleware.go

@@ -38,7 +38,7 @@ func (m *logMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	m.childHandler.ServeHTTP(statefulWriter, r)
 	duration := m.timeNow().Sub(tStart)
 	m.logger.Info(strconv.Itoa(statefulWriter.statusCode) + " " +
-		r.Method + " " + r.URL.String() +
+		r.Method + " " + r.RequestURI +
 		" wrote " + strconv.Itoa(statefulWriter.length) + "B to " +
 		r.RemoteAddr + " in " + duration.String())
 }

internal/server/openvpn.go

@@ -10,10 +10,13 @@ import (
 	"github.com/qdm12/gluetun/internal/constants/vpn"
 )
 
-func newOpenvpnHandler(ctx context.Context, looper VPNLooper, w warner) http.Handler {
+func newOpenvpnHandler(ctx context.Context, looper VPNLooper,
+	pfGetter PortForwardedGetter, w warner,
+) http.Handler {
 	return &openvpnHandler{
 		ctx:    ctx,
 		looper: looper,
+		pf:     pfGetter,
 		warner: w,
 	}
 }
@@ -21,6 +24,7 @@ func newOpenvpnHandler(ctx context.Context, looper VPNLooper, w warner) http.Han
 type openvpnHandler struct {
 	ctx    context.Context //nolint:containedctx
 	looper VPNLooper
+	pf     PortForwardedGetter
 	warner warner
 }
 
@@ -43,10 +47,10 @@ func (h *openvpnHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		default:
 			errMethodNotSupported(w, r.Method)
 		}
-	case "/portforwarded": // TODO v4 remove
+	case "/portforwarded":
 		switch r.Method {
 		case http.MethodGet:
-			http.Redirect(w, r, "/v1/portforward", http.StatusMovedPermanently)
+			h.getPortForwarded(w)
 		default:
 			errMethodNotSupported(w, r.Method)
 		}
@@ -118,3 +122,23 @@ func (h *openvpnHandler) getSettings(w http.ResponseWriter) {
 		return
 	}
 }
+
+func (h *openvpnHandler) getPortForwarded(w http.ResponseWriter) {
+	ports := h.pf.GetPortsForwarded()
+	encoder := json.NewEncoder(w)
+	var data any
+	switch len(ports) {
+	case 0:
+		data = portWrapper{Port: 0} // TODO v4 change to portsWrapper
+	case 1:
+		data = portWrapper{Port: ports[0]} // TODO v4 change to portsWrapper
+	default:
+		data = portsWrapper{Ports: ports}
+	}
+
+	err := encoder.Encode(data)
+	if err != nil {
+		h.warner.Warn(err.Error())
+		w.WriteHeader(http.StatusInternalServerError)
+	}
+}

internal/server/portforward.go

@@ -1,52 +0,0 @@
-package server
-
-import (
-	"context"
-	"encoding/json"
-	"net/http"
-)
-
-func newPortForwardHandler(ctx context.Context,
-	portForward PortForwardedGetter, warner warner,
-) http.Handler {
-	return &portForwardHandler{
-		ctx:         ctx,
-		portForward: portForward,
-		warner:      warner,
-	}
-}
-
-type portForwardHandler struct {
-	ctx         context.Context //nolint:containedctx
-	portForward PortForwardedGetter
-	warner      warner
-}
-
-func (h *portForwardHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	switch r.Method {
-	case http.MethodGet:
-		h.getPortForwarded(w)
-	default:
-		errMethodNotSupported(w, r.Method)
-	}
-}
-
-func (h *portForwardHandler) getPortForwarded(w http.ResponseWriter) {
-	ports := h.portForward.GetPortsForwarded()
-	encoder := json.NewEncoder(w)
-	var data any
-	switch len(ports) {
-	case 0:
-		data = portWrapper{Port: 0} // TODO v4 change to portsWrapper
-	case 1:
-		data = portWrapper{Port: ports[0]} // TODO v4 change to portsWrapper
-	default:
-		data = portsWrapper{Ports: ports}
-	}
-
-	err := encoder.Encode(data)
-	if err != nil {
-		h.warner.Warn(err.Error())
-		w.WriteHeader(http.StatusInternalServerError)
-	}
-}

internal/server/server.go

@@ -6,25 +6,33 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/httpserver"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/server/middlewares/auth"
 )
 
-func New(ctx context.Context, settings settings.ControlServer, logger Logger,
+func New(ctx context.Context, address string, logEnabled bool, logger Logger,
-	buildInfo models.BuildInformation, openvpnLooper VPNLooper,
+	authConfigPath string, buildInfo models.BuildInformation, openvpnLooper VPNLooper,
 	pfGetter PortForwardedGetter, dnsLooper DNSLoop,
 	updaterLooper UpdaterLooper, publicIPLooper PublicIPLoop, storage Storage,
 	ipv6Supported bool) (
 	server *httpserver.Server, err error,
 ) {
-	authSettings, err := setupAuthMiddleware(settings.AuthFilePath, settings.AuthDefaultRole, logger)
+	authSettings, err := auth.Read(authConfigPath)
+	switch {
+	case errors.Is(err, os.ErrNotExist): // no auth file present
+	case err != nil:
+		return nil, fmt.Errorf("reading auth settings: %w", err)
+	default:
+		logger.Infof("read %d roles from authentication file", len(authSettings.Roles))
+	}
+	authSettings.SetDefaults()
+	err = authSettings.Validate()
 	if err != nil {
-		return nil, fmt.Errorf("building authentication middleware settings: %w", err)
+		return nil, fmt.Errorf("validating auth settings: %w", err)
 	}
 
-	handler, err := newHandler(ctx, logger, *settings.Log, authSettings, buildInfo,
+	handler, err := newHandler(ctx, logger, logEnabled, authSettings, buildInfo,
 		openvpnLooper, pfGetter, dnsLooper, updaterLooper, publicIPLooper,
 		storage, ipv6Supported)
 	if err != nil {
@@ -32,7 +40,7 @@ func New(ctx context.Context, settings settings.ControlServer, logger Logger,
 	}
 
 	httpServerSettings := httpserver.Settings{
-		Address: *settings.Address,
+		Address: address,
 		Handler: handler,
 		Logger:  logger,
 	}
@@ -44,25 +52,3 @@ func New(ctx context.Context, settings settings.ControlServer, logger Logger,
 
 	return server, nil
 }
-
-func setupAuthMiddleware(authPath, jsonDefaultRole string, logger Logger) (
-	authSettings auth.Settings, err error,
-) {
-	authSettings, err = auth.Read(authPath)
-	switch {
-	case errors.Is(err, os.ErrNotExist): // no auth file present
-	case err != nil:
-		return auth.Settings{}, fmt.Errorf("reading auth settings: %w", err)
-	default:
-		logger.Infof("read %d roles from authentication file", len(authSettings.Roles))
-	}
-	err = authSettings.SetDefaultRole(jsonDefaultRole)
-	if err != nil {
-		return auth.Settings{}, fmt.Errorf("setting default role: %w", err)
-	}
-	err = authSettings.Validate()
-	if err != nil {
-		return auth.Settings{}, fmt.Errorf("validating auth settings: %w", err)
-	}
-	return authSettings, nil
-}

internal/updater/providers.go

@@ -29,7 +29,7 @@ func (u *Updater) updateProvider(ctx context.Context, provider Provider,
 			u.logger.Warn("note: if running the update manually, you can use the flag " +
 				"-minratio to allow the update to succeed with less servers found")
 		}
-		return fmt.Errorf("getting %s servers: %w", providerName, err)
+		return fmt.Errorf("getting servers: %w", err)
 	}
 
 	for _, server := range servers {

internal/updater/updater.go

@@ -2,11 +2,9 @@ package updater
 
 import (
 	"context"
-	"errors"
 	"net/http"
 	"time"
 
-	"github.com/qdm12/gluetun/internal/provider/common"
 	"github.com/qdm12/gluetun/internal/updater/unzip"
 	"golang.org/x/text/cases"
 	"golang.org/x/text/language"
@@ -50,22 +48,22 @@ func (u *Updater) UpdateServers(ctx context.Context, providers []string,
 		// TODO support servers offering only TCP or only UDP
 		// for NordVPN and PureVPN
 		err := u.updateProvider(ctx, fetcher, minRatio)
-		switch {
+		if err == nil {
-		case err == nil:
 			continue
-		case errors.Is(err, common.ErrCredentialsMissing):
-			u.logger.Warn(err.Error() + " - skipping update for " + providerName)
-			continue
-		case len(providers) == 1:
-			// return the only error for the single provider.
-			return err
-		case ctx.Err() != nil:
-			// stop updating other providers if context is done
-			return ctx.Err()
-		default: // error encountered updating one of multiple providers
-			// Log the error and continue updating the next provider.
-			u.logger.Error(err.Error())
 		}
+
+		// return the only error for the single provider.
+		if len(providers) == 1 {
+			return err
+		}
+
+		// stop updating the next providers if context is canceled.
+		if ctxErr := ctx.Err(); ctxErr != nil {
+			return ctxErr
+		}
+
+		// Log the error and continue updating the next provider.
+		u.logger.Error(err.Error())
 	}
 
 	return nil

internal/vpn/loop.go

@@ -8,6 +8,7 @@ import (
 	"github.com/qdm12/gluetun/internal/constants"
 	"github.com/qdm12/gluetun/internal/loopstate"
 	"github.com/qdm12/gluetun/internal/models"
+	"github.com/qdm12/gluetun/internal/netlink"
 	"github.com/qdm12/gluetun/internal/vpn/state"
 	"github.com/qdm12/log"
 )
@@ -21,10 +22,10 @@ type Loop struct {
 	healthChecker  HealthChecker
 	healthServer   HealthServer
 	// Fixed parameters
-	buildInfo     models.BuildInformation
+	buildInfo        models.BuildInformation
-	versionInfo   bool
+	versionInfo      bool
-	ipv6Supported bool
+	ipv6SupportLevel netlink.IPv6SupportLevel
-	vpnInputPorts []uint16 // TODO make changeable through stateful firewall
+	vpnInputPorts    []uint16 // TODO make changeable through stateful firewall
 	// Configurators
 	openvpnConf OpenVPN
 	netLinker   NetLinker
@@ -51,7 +52,7 @@ const (
 	defaultBackoffTime = 15 * time.Second
 )
 
-func NewLoop(vpnSettings settings.VPN, ipv6Supported bool, vpnInputPorts []uint16,
+func NewLoop(vpnSettings settings.VPN, ipv6SupportLevel netlink.IPv6SupportLevel, vpnInputPorts []uint16,
 	providers Providers, storage Storage, healthSettings settings.Health,
 	healthChecker HealthChecker, healthServer HealthServer, openvpnConf OpenVPN,
 	netLinker NetLinker, fw Firewall, routing Routing,
@@ -69,32 +70,32 @@ func NewLoop(vpnSettings settings.VPN, ipv6Supported bool, vpnInputPorts []uint1
 	state := state.New(statusManager, vpnSettings)
 
 	return &Loop{
-		statusManager:  statusManager,
+		statusManager:    statusManager,
-		state:          state,
+		state:            state,
-		providers:      providers,
+		providers:        providers,
-		storage:        storage,
+		storage:          storage,
-		healthSettings: healthSettings,
+		healthSettings:   healthSettings,
-		healthChecker:  healthChecker,
+		healthChecker:    healthChecker,
-		healthServer:   healthServer,
+		healthServer:     healthServer,
-		buildInfo:      buildInfo,
+		buildInfo:        buildInfo,
-		versionInfo:    versionInfo,
+		versionInfo:      versionInfo,
-		ipv6Supported:  ipv6Supported,
+		ipv6SupportLevel: ipv6SupportLevel,
-		vpnInputPorts:  vpnInputPorts,
+		vpnInputPorts:    vpnInputPorts,
-		openvpnConf:    openvpnConf,
+		openvpnConf:      openvpnConf,
-		netLinker:      netLinker,
+		netLinker:        netLinker,
-		fw:             fw,
+		fw:               fw,
-		routing:        routing,
+		routing:          routing,
-		portForward:    portForward,
+		portForward:      portForward,
-		publicip:       publicip,
+		publicip:         publicip,
-		dnsLooper:      dnsLooper,
+		dnsLooper:        dnsLooper,
-		starter:        starter,
+		starter:          starter,
-		logger:         logger,
+		logger:           logger,
-		client:         client,
+		client:           client,
-		start:          start,
+		start:            start,
-		running:        running,
+		running:          running,
-		stop:           stop,
+		stop:             stop,
-		stopped:        stopped,
+		stopped:          stopped,
-		userTrigger:    true,
+		userTrigger:      true,
-		backoffTime:    defaultBackoffTime,
+		backoffTime:      defaultBackoffTime,
 	}
 }

internal/vpn/openvpn.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/models"
+	"github.com/qdm12/gluetun/internal/netlink"
 	"github.com/qdm12/gluetun/internal/openvpn"
 	"github.com/qdm12/gluetun/internal/provider"
 )
@@ -14,15 +15,16 @@ import (
 // It returns a serverName for port forwarding (PIA) and an error if it fails.
 func setupOpenVPN(ctx context.Context, fw Firewall,
 	openvpnConf OpenVPN, providerConf provider.Provider,
-	settings settings.VPN, ipv6Supported bool, starter CmdStarter,
+	settings settings.VPN, ipv6SupportLevel netlink.IPv6SupportLevel, starter CmdStarter,
 	logger openvpn.Logger) (runner *openvpn.Runner, connection models.Connection, err error,
 ) {
-	connection, err = providerConf.GetConnection(settings.Provider.ServerSelection, ipv6Supported)
+	ipv6Internet := ipv6SupportLevel == netlink.IPv6Internet
+	connection, err = providerConf.GetConnection(settings.Provider.ServerSelection, ipv6Internet)
 	if err != nil {
 		return nil, models.Connection{}, fmt.Errorf("finding a valid server connection: %w", err)
 	}
 
-	lines := providerConf.OpenVPNConfig(connection, settings.OpenVPN, ipv6Supported)
+	lines := providerConf.OpenVPNConfig(connection, settings.OpenVPN, ipv6SupportLevel.IsSupported())
 
 	if err := openvpnConf.WriteConfig(lines); err != nil {
 		return nil, models.Connection{}, fmt.Errorf("writing configuration to file: %w", err)

internal/vpn/run.go

@@ -36,11 +36,11 @@ func (l *Loop) Run(ctx context.Context, done chan<- struct{}) {
 		if settings.Type == vpn.OpenVPN {
 			vpnInterface = settings.OpenVPN.Interface
 			vpnRunner, connection, err = setupOpenVPN(ctx, l.fw,
-				l.openvpnConf, providerConf, settings, l.ipv6Supported, l.starter, subLogger)
+				l.openvpnConf, providerConf, settings, l.ipv6SupportLevel, l.starter, subLogger)
 		} else { // Wireguard
 			vpnInterface = settings.Wireguard.Interface
 			vpnRunner, connection, err = setupWireguard(ctx, l.netLinker, l.fw,
-				providerConf, settings, l.ipv6Supported, subLogger)
+				providerConf, settings, l.ipv6SupportLevel, subLogger)
 		}
 		if err != nil {
 			l.crashed(ctx, err)

internal/vpn/wireguard.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/models"
+	"github.com/qdm12/gluetun/internal/netlink"
 	"github.com/qdm12/gluetun/internal/provider"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 	"github.com/qdm12/gluetun/internal/wireguard"
@@ -16,15 +17,16 @@ import (
 // It returns a serverName for port forwarding (PIA) and an error if it fails.
 func setupWireguard(ctx context.Context, netlinker NetLinker,
 	fw Firewall, providerConf provider.Provider,
-	settings settings.VPN, ipv6Supported bool, logger wireguard.Logger) (
+	settings settings.VPN, ipv6SupportLevel netlink.IPv6SupportLevel, logger wireguard.Logger) (
 	wireguarder *wireguard.Wireguard, connection models.Connection, err error,
 ) {
-	connection, err = providerConf.GetConnection(settings.Provider.ServerSelection, ipv6Supported)
+	ipv6Internet := ipv6SupportLevel == netlink.IPv6Internet
+	connection, err = providerConf.GetConnection(settings.Provider.ServerSelection, ipv6Internet)
 	if err != nil {
 		return nil, models.Connection{}, fmt.Errorf("finding a VPN server: %w", err)
 	}
 
-	wireguardSettings := utils.BuildWireguardSettings(connection, settings.Wireguard, ipv6Supported)
+	wireguardSettings := utils.BuildWireguardSettings(connection, settings.Wireguard, ipv6SupportLevel.IsSupported())
 
 	logger.Debug("Wireguard server public key: " + wireguardSettings.PublicKey)
 	logger.Debug("Wireguard client private key: " + gosettings.ObfuscateKey(wireguardSettings.PrivateKey))