AirVPN IPv6 OpenVPN `write UDPv6 []: Address not available (fd=3,code=99)`

[mikul9]

Is this urgent?

No

Host OS

DSM 7.21 (Synology)

CPU arch

x86_64

VPN service provider

AirVPN

What are you using to run the container

docker run

What is the version of Gluetun

Running version latest built on 2024-08-25T07:04:32.409Z (commit 01fa993)

What's the problem 🤔

Failure to connect to AirVPN after update to the latest version. The problem persists with the firewall disabled. Moving back to pr-2285 works.

Share your logs (at least 10 lines)

Stuck in this loop:

2024/09/05 11:00:22	stdout	2024-09-05T11:00:22-04:00 INFO [firewall] removing allowed port 13482...
2024/09/05 11:00:22	stdout	2024-09-05T11:00:22-04:00 INFO [vpn] stopping
2024/09/05 11:00:22	stdout	2024-09-05T11:00:22-04:00 INFO [healthcheck] DO NOT OPEN AN ISSUE UNLESS YOU READ AND TRIED EACH POSSIBLE SOLUTION
2024/09/05 11:00:22	stdout	2024-09-05T11:00:22-04:00 INFO [healthcheck] 👉 See https://github.com/qdm12/gluetun-wiki/blob/main/faq/healthcheck.md
2024/09/05 11:00:22	stdout	2024-09-05T11:00:22-04:00 INFO [healthcheck] program has been unhealthy for 11s: restarting VPN
2024/09/05 11:00:18	stdout	2024-09-05T11:00:18-04:00 INFO [openvpn] write UDPv6 []: Address not available (fd=3,code=99)
2024/09/05 11:00:13	stdout	2024-09-05T11:00:13-04:00 INFO [openvpn] write UDPv6 []: Address not available (fd=3,code=99)
2024/09/05 11:00:11	stdout	2024-09-05T11:00:11-04:00 INFO [openvpn] write UDPv6 []: Address not available (fd=3,code=99)
2024/09/05 11:00:11	stdout	2024-09-05T11:00:11-04:00 INFO [openvpn] UDPv6 link remote: [AF_INET6]2001:ac8:40:8:6e2e:89db:741:eecb:1194
2024/09/05 11:00:11	stdout	2024-09-05T11:00:11-04:00 INFO [openvpn] UDPv6 link local: (not bound)
2024/09/05 11:00:11	stdout	2024-09-05T11:00:11-04:00 INFO [openvpn] TCP/UDP: Preserving recently used remote address: [AF_INET6]2001:ac8:40:8:6e2e:89db:741:eecb:1194
2024/09/05 11:00:11	stdout	2024-09-05T11:00:11-04:00 INFO [openvpn] library versions: OpenSSL 3.3.1 4 Jun 2024, LZO 2.10
2024/09/05 11:00:11	stdout	2024-09-05T11:00:11-04:00 INFO [openvpn] OpenVPN 2.6.11 x86_64-alpine-linux-musl [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD]
2024/09/05 11:00:11	stdout	2024-09-05T11:00:11-04:00 INFO [firewall] allowing VPN connection...
2024/09/05 11:00:11	stdout	2024-09-05T11:00:11-04:00 INFO [vpn] starting

Share your configuration

gluetun:
    image: qmcgaw/gluetun:latest   
    container_name: gluetun
    cap_add:
      - NET_ADMIN
    devices:
      - /dev/net/tun:/dev/net/tun
    ports:
      - 8888:8888/tcp 
      - 8388:8388/tcp 
      - 8388:8388/udp 
      - 8090:8090/tcp
    volumes:
      - /volume1/docker/gluetun:/gluetun
    environment:
      - PUID=1030 
      - PGID=65526 
      - TZ=America/New_York 
      - VPN_SERVICE_PROVIDER=airvpn
      - VPN_TYPE=openvpn  
      - OPENVPN_USER=UserName
      - OPENVPN_PASSWORD=PaSsWoRd
      - HTTPPROXY=off 
      - SHADOWSOCKS=off 
      - FIREWALL_OUTBOUND_SUBNETS=181.20.0.0/16,192.168.1.0/24 
      - FIREWALL_VPN_INPUT_PORTS=12462 
      - UPDATER_PERIOD=24h
    network_mode: synobridge
    labels:
      - com.centurylinklabs.watchtower.enable=false
    security_opt:
      - no-new-privileges:true
    restart: always

[github-actions]

@qdm12 is more or less the only maintainer of this project and works on it in his free time.
Please:

• do not ask for updates, be patient
• 👍 the issue to show your support instead of commenting
  @qdm12 usually checks issues at least once a week, if this is a new urgent bug,
  revert to an older tagged container image

[caballinger]

Having the exact same issue here with openvpn connections on airvpn. Wireguard connections on airvpn continue to work just fine on the latest image.

[qdm12]

This is due to Openvpn trying to use IPv6, and your Docker setup probably doesn't support it. It could also be due to the upgrade from openvpn 2.5 to 2.6.

1. If you run with LOG_LEVEL=debug, what IPv6 relevant lines do you get (for example IPv6 is supported by link ....)?
2. What happens if you run image qmcgaw/gluetun:v3.39.0 with OPENVPN_VERSION=2.5?
3. What happens if you run image qmcgaw/gluetun:v3.38.1?

also please use v3.x.x tagged images, not pr-2285. I have no idea what that image tag (for PR #2285) and it's hard for me to debug.

[caballinger]

qmcgaw/gluetun:v3.39.0 with OPENVPN_VERSION=2.5: Same issue
qmcgaw/gluetun:v3.38.1 without OPENVPN_VERSION=2.5: Working
Related error in log:

2024/09/20 13:07:47,stdout,2024-09-20T13:07:47-07:00 INFO [openvpn] Exiting due to fatal error
2024/09/20 13:07:47,stdout,2024-09-20T13:07:47-07:00 INFO [openvpn] Linux ip -6 addr add failed: external program exited with error status: 2
2024/09/20 13:07:47,stdout,2024-09-20T13:07:47-07:00 ERROR [openvpn] RTNETLINK answers: Permission denied
2024/09/20 13:07:47,stdout,2024-09-20T13:07:47-07:00 INFO [openvpn] /sbin/ip -6 addr add fde6:7a:7d20:1b7a::10ab/64 dev tun0
2024/09/20 13:07:47,stdout,2024-09-20T13:07:47-07:00 INFO [openvpn] /sbin/ip link set dev tun0 up

[mikul9]

Confirmed that qmcgaw/gluetun:v3.38.1 is working.

[KindaWrks]

I have had the same issue with the last few updates. When ever I go back to 3.39 and even the new 3.39.1 it works. With each pull of latest it does the udpv6 error. I tried to add a environment variable to stop it from using ip6 but that didn't seem to help.

[VonPuffelen]

Same issue, i go back to V3.38.0 and no problems anymore.