Bug: ipv6 wireguard rule does not get cleaned up

[Darkfella91]

Is this urgent?

No

Host OS

Talos OS

CPU arch

x86_64

VPN service provider

ProtonVPN

What are you using to run the container

Kubernetes

What is the version of Gluetun

Running version v3.39.0 built on 2024-08-09T08:07:23.827Z (commit 09c47c7)

What's the problem 🤔

Basically each time my internet connection drops for any reason or if my dns server isnt available, the health check restarts the vpn connection but it fails to connect after that and goes in loops . Only manually killing the pod would restore my vpn connection.

Share your logs (at least 10 lines)

2024-09-07T10:20:15Z INFO [vpn] retrying in 30s
2024-09-07T10:20:15Z DEBUG [wireguard] deleting link...
2024-09-07T10:20:27Z INFO [healthcheck] program has been unhealthy for 11s: restarting VPN
2024-09-07T10:20:27Z INFO [healthcheck] 👉 See https://github.com/qdm12/gluetun-wiki/blob/main/faq/healthcheck.md
2024-09-07T10:20:27Z INFO [healthcheck] DO NOT OPEN AN ISSUE UNLESS YOU READ AND TRIED EACH POSSIBLE SOLUTION
2024-09-07T10:20:45Z DEBUG [wireguard] Wireguard server public key: VNNO5MYorFu1UerHvoXccW6TvotxbJ1GAGJKtzM9HTY=
2024-09-07T10:20:45Z DEBUG [wireguard] Wireguard client private key: 2MD...HY=
2024-09-07T10:20:45Z DEBUG [wireguard] Wireguard pre-shared key: [not set]
2024-09-07T10:20:45Z INFO [firewall] allowing VPN connection...
2024-09-07T10:20:45Z DEBUG [firewall] iptables --delete OUTPUT -d 149.88.27.193 -o eth0 -p udp -m udp --dport 51820 -j ACCEPT
2024-09-07T10:20:45Z DEBUG [firewall] iptables --delete OUTPUT -o tun0 -j ACCEPT
2024-09-07T10:20:45Z DEBUG [firewall] ip6tables --delete OUTPUT -o tun0 -j ACCEPT
2024-09-07T10:20:45Z DEBUG [firewall] iptables --append OUTPUT -d 185.159.157.23 -o eth0 -p udp -m udp --dport 51820 -j ACCEPT
2024-09-07T10:20:45Z DEBUG [firewall] iptables --append OUTPUT -o tun0 -j ACCEPT
2024-09-07T10:20:45Z DEBUG [firewall] ip6tables --append OUTPUT -o tun0 -j ACCEPT
2024-09-07T10:20:45Z INFO [wireguard] Using available kernelspace implementation
2024-09-07T10:20:45Z INFO [wireguard] Connecting to 185.159.157.23:51820
2024-09-07T10:20:45Z DEBUG [wireguard] closing controller client...
2024-09-07T10:20:45Z DEBUG [wireguard] shutting down link...
2024-09-07T10:20:45Z ERROR [vpn] adding IPv6 rule: adding rule ip rule 101: from all to all table 51820: file exists
2024-09-07T10:20:45Z INFO [vpn] retrying in 1m0s
2024-09-07T10:20:45Z DEBUG [wireguard] deleting link...
2024-09-07T10:20:47Z INFO [healthcheck] program has been unhealthy for 16s: restarting VPN
2024-09-07T10:20:47Z INFO [healthcheck] 👉 See https://github.com/qdm12/gluetun-wiki/blob/main/faq/healthcheck.md
2024-09-07T10:20:47Z INFO [healthcheck] DO NOT OPEN AN ISSUE UNLESS YOU READ AND TRIED EACH POSSIBLE SOLUTION

Share your configuration

env:
          VPN_SERVICE_PROVIDER: "protonvpn"
          VPN_TYPE: "wireguard"
          SERVER_CITIES: "Zurich"
          PORT_FORWARD_ONLY: "on"
          WIREGUARD_PRIVATE_KEY:
            secretKeyRef:
                    expandObjectName: false
                    name: vpn-config
                    key: private-key
          VPN_PORT_FORWARDING: "on"
          VPN_PORT_FORWARDING_PROVIDER: protonvpn
          VPN_PORT_FORWARDING_LISTENING_PORT: "6881"
          FIREWALL_DEBUG: "on"
          LOG_LEVEL: "debug"
        killSwitch: true