Bug: Gluetun fails to start on ADM v5 with Gluetun versions above v3.28.2

[quill-g]

Is this urgent?

Yes

Host OS

ADM 5.0.0.REO2

CPU arch

None

VPN service provider

Mullvad

What are you using to run the container

Portainer

What is the version of Gluetun

Running version latest built on 2025-01-22T08:30:14.628Z (commit 13532c8)

What's the problem 🤔

I am trying to run a Portainer stack with Gluetun and qBt on an Asustor Lockerstor 6 gen3 NAS. Gluetun fails to start on the latest version, but starts "successfully" on v3.28.2 (however is unusable due to #2154 and is immediately marked unhealthy.)
This exact issue seems to be described here!

Share your logs (at least 10 lines)

========================================
========================================
=============== gluetun ================
========================================
=========== Made with ❤️ by ============
======= https://github.com/qdm12 =======
========================================
========================================
Running version latest built on 2025-01-22T08:30:14.628Z (commit 13532c8)
🔧 Need help? ☕ Discussion? https://github.com/qdm12/gluetun/discussions/new/choose
🐛 Bug? ✨ New feature? https://github.com/qdm12/gluetun/issues/new/choose
💻 Email? quentin.mcgaw@gmail.com
💰 Help me? https://www.paypal.me/qmcgaw https://github.com/sponsors/qdm12
2025-03-02T23:17:14Z INFO [routing] default route found: interface eth0, gateway 172.18.0.1, assigned IP 172.18.0.2 and family v4
2025-03-02T23:17:14Z INFO [routing] local ethernet link found: eth0
2025-03-02T23:17:14Z INFO [routing] local ipnet found: 172.18.0.0/16
2025-03-02T23:17:14Z INFO [firewall] enabling...
2025-03-02T23:17:14Z ERROR enabling firewall: command failed: "iptables --append OUTPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT": Warning: Extension conntrack revision 0 not supported, missing kernel module?
iptables v1.8.10 (nf_tables):  RULE_APPEND failed (No such file or directory): rule in chain OUTPUT: exit status 4
2025-03-02T23:17:14Z INFO Shutdown successful

Share your configuration

version: "3"
services:
  gluetun:
    image: qmcgaw/gluetun:latest
    cap_add:
      - NET_ADMIN
    devices:
      - /dev/net/tun:/dev/net/tun
    environment:
      - VPN_SERVICE_PROVIDER=mullvad
      - VPN_TYPE=wireguard
      - WIREGUARD_PRIVATE_KEY=<redacted>
      - WIREGUARD_ADDRESSES=<redacted>
      - SERVER_COUNTRIES=USA
  qbittorrent:
    image: lscr.io/linuxserver/qbittorrent:latest
    container_name: qbittorrent
    network_mode: "service:gluetun"
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
      - WEBUI_PORT=28080
    volumes:
      - /share/Docker/qbittorrent/config:/config
      - /share/Docker/qbittorrent/downloads:/downloads
    depends_on:
      gluetun:
        condition: service_healthy

[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