this post was submitted on 02 Feb 2024
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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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[–] lone_faerie@lemmy.blahaj.zone 3 points 9 months ago (2 children)

I've been looking at setting up something similar and plan on following this guide, and putting Traefik in front of it as a tcp reverse proxy .

https://blog.aiquiral.me/bypass-cgnat

[–] raldone01@lemmy.world 2 points 9 months ago* (last edited 9 months ago) (1 children)

Wow this may have been the missing piece to get my setup working. If I manage to do it will send you an URL to a git repo.

[–] lone_faerie@lemmy.blahaj.zone 2 points 9 months ago

Awesome! I'm glad I could help. Good luck! I've been spending quite a bit of time figuring out how to get this to run alongside other services. I think I just need to add an extra iptables rule to ignore port 443 so https requests will go through traefik first.

[–] raldone01@lemmy.world 2 points 9 months ago* (last edited 9 months ago)

Looks nice. I think I will build two docker containers with wireguard and iptables. This blog will be a great help.