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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

27 comments fedilink hide all child comments

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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[–] olof@lemmy.ml 6 points 9 months ago (1 children)

Tailscale maybe? They have a mode where you can configure a site to site links, you could route the docker networks. https://tailscale.com/kb/1019/subnets

[–] raldone01@lemmy.world 3 points 9 months ago* (last edited 9 months ago) (1 children)

I have heard of it seems like a good option. If you use it please tell me if it can fullfil my requirements.

Mhh I didn't know headscale exists. Tailscale being proprietary was the main thing keeping me from using it.

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

I haven't used Tailscale myself, but it seems like it's basically just a Wireguard frontend.

[–] LunchEnjoyer@lemmy.world 1 points 9 months ago (1 children)

Although correct, there feature set is amazing and expanding. Tailscale is my number one tool of choice, these days, it's so simple and so handy.

[–] RiderExMachina@lemmy.ml 1 points 9 months ago

"Technically correct" is the best form of correct. Though having tried setting up Wireguard in the past, having a dead-simple solution like Tailscale might be worth trying it out, especially with the 100 device free tier