Fix: FIREWALL_VPN_INPUT_PORTS for Wireguard

cmd/gluetun/main.go

@@ -294,7 +294,8 @@ func _main(ctx context.Context, buildInfo models.BuildInformation,
 	}
 
 	for _, vpnPort := range allSettings.Firewall.VPNInputPorts {
-		err = firewallConf.SetAllowedPort(ctx, vpnPort, allSettings.VPN.OpenVPN.Interface)
+		vpnIntf := allSettings.VPN.VPNInterface()
+		err = firewallConf.SetAllowedPort(ctx, vpnPort, vpnIntf)
 		if err != nil {
 			return err
 		}

internal/configuration/vpn.go

@@ -87,3 +87,11 @@ func (settings VPN) isOpenVPNCustomConfig(env params.Interface) (ok bool) {
 	s, err := env.Get("OPENVPN_CUSTOM_CONFIG")
 	return err == nil && s != ""
 }
+
+func (settings VPN) VPNInterface() (intf string) {
+	if settings.Type == constants.Wireguard {
+		return settings.Wireguard.Interface
+	}
+	// OpenVPN
+	return settings.OpenVPN.Interface
+}