I recently activated IPv6 on my Netcup VPS, and in the process of setting it up on all my LXCs I noticed that for “reasons” the IPv6 default route would vanish after starting Docker (switching it all over to Podman is on my TODO list), effectively breaking the IPv6 connectivity on this LXC.
In my original deployment of Proxmox on my VPS I only enabled IPv4, and I was using socat to forward traffic from the IPv6 address of the host to the internal IPv4 addresses of the containers. Not ideal, since this masks the external IP addresses, and also creates some latency and additional CPU load when processing IPv6.
I run Proxmox Virtual Environment as my virtualisation platform. On top of this I use virtual machines using KVM and Linux Containers using LXC - both of which are natively supported on ProxmoxVE.
Code, and where to store it
It’s all about the Tunnels, baby!