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Best way to get IPv4 connectivity to my self-hosted services (infosec.pub)

submitted 1 year ago by Quik@infosec.pub to c/selfhosted@lemmy.world

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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).

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[–] hank_and_deans@lemmy.ca 1 points 1 year ago* (last edited 1 year ago)

That is correct. There is a trick where you can set the source ip to the ipv6 mapped ipv4 ip it originally came from. I have implemented that in a transparent tcp proxy I worked on some years ago, but I am not sure if nginx supports that.

I should look into that actually. It would be useful to me as well.

Edit: actually that only works if you are in the routing path. However a nat64 solution would work as well, where you map a /64 back to the proxy.