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Setting Up a Secure Tunnel Between Two Machines (lemmy.world)

submitted 9 months ago by raldone01@lemmy.world to c/selfhosted@lemmy.world

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I have two machines running docker. A (powerful) and B (tiny vps).

All my services are hosted at home on machine A. All dns records point to A. I want to point them to B and implement split horizon dns in my local network to still directly access A. Ideally A is no longer reachable from outside without going over B.

How can I forward requests on machine B to A over a tunnel like wireguard without loosing the source ip addresses?

I tried to get this working by creating two wireguard containers. I think I only need iptable rules on the WG container A but I am not sure. I am a bit confused about the iptable rules needed to get wireguard to properly forward the request through the tunnel.

What are your solutions for such a setup? Is there a better way to do this? I would also be glad for some keywords/existing solutions.

Additional info:

Ideally I would like to not leave docker.
Split horizon dns is no problem.
I have a static ipv6 and ipv4 on both machines.
I also have spare ipv6 subnets that I can use for intermediate routing.
I would like to avoid cloudflare.

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[–] ninjan@lemmy.mildgrim.com 1 points 9 months ago* (last edited 9 months ago) (1 children)

Well thats just a normal reverse proxy then. In my setup I use Caddy to send traffic through the NetBird managed wireguard tunnel to my home machine that runs Jellyfin but for any outside observer it look like it's my VPS that is serving Jellyfin.

[–] raldone01@lemmy.world 1 points 9 months ago* (last edited 9 months ago)

Jes exactly but without being http/https only and without decrypting the traffic on the vps.

That's why the forwarded for header won't work. It's one layer below.