I am not sure if I would have better luck here or at OPNSense forum, so I thought I'd try here first. IPv6 is a curiosity, and also it used to work out of the box when I was on a crappy Mikrotik ...

So I'm rebuilding my Proxmox server, and as my hosting provides just a single public IP for free, but a /64 IPv6 address range, it's that time again to think if I should make an effort to adopt IPv6.