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[Tailscale] Can't connect VPS to local network? (lemmy.dbzer0.com)

submitted 7 months ago by [email protected] to c/[email protected]

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I set up Headscale and Tailscale using Docker on a VPS, which I want to use as my public IPv4 and Reverse Proxy to route incoming traffic to my local network and e. g. my home server. I also set up Tailscale using Docker on my home server and connected both to my Headscale server.
I am able to ping on Tailscale container from the other and vice versa and set up --advertise-routes=192.168.178.0/24 on my home server as well as --accept-routes on my VPS, but I can't ping local IP addresses from my VPS. What am I missing?
Both container are connected to the host network, I have opened UDP ports 41641 and 3478 on my VPS.

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[–] [email protected] 2 points 7 months ago

I ran into a similar problem with tailscale. It looked like I needed to disable source NAT but that didn’t appear to be implemented in the FreeBSD package so it didn’t work for me. If you’re in Linux it might be worth a shot.

--snat-subnet-routes=false

“Disables source NAT. In normal operations, a subnet device will see the traffic originating from the subnet router. This simplifies routing, but does not allow traversing multiple networks. By disabling source NAT, the end machine sees the LAN IP address of the originating machine as the source.”

https://tailscale.com/kb/1214/site-to-site