Hi, I live in Germany and only have public IPv6. My address changes only very, very rarely and has never changed in the time I’ve been self-hosting.
I also have a very small, pretty cheap VPS with static IPv4/IPv6 – which would seem like a great fit for some sort of tunneling/proxy setup. Now comes the question: What/how should I use it? I would like to not have the additional latency for IPv6 enabled hosts, can I just setup a reverse proxy for IPv4? Would Tailscale work for my usecase, what are some resources you found useful when using it?
Currently, I’m just hosting everything IPv6-only and hoping my address never changes, but that does not work for everyone, as especially many new buildings with fiber optic connections still only have IPv4 (strangely).
Yes, you can just use a reverse proxy for IPv4 only and point it to the IPv6 upstream. That is what I do, with a separate DNS record which then combines the two. See the DNS records for id.knifepoint.net (CNAME), http.vineta.knifepoint.net (AAAA, A) and vineta.knifepoint.net (AAAA).
The reverse proxy config and certificate management is set up with NixOS, if it helps: https://git.dblsaiko.net/systems/tree/nixos/defaults/v4proxy.nix https://git.dblsaiko.net/systems/tree/nixos/modules/sys2x/v4proxy.nix