Hey guys, so I’ve been self hosting for 2 years, making small upgrades until I reached this point where I replaced my router with one of those Chinese fanless firewalls running Intel n150 and running a proxmox homelab.

I am self hosting headscale with many of my buddies connected, including ny own services. Everything was working great until I setup OPNsense.

The firewall was not easy to setup, but after I set it up, I discovered odd behaviors from tailscale.

The firewall was blocking all connections from the ip 100.60.0.0/24, I had to explicitly allow it and change the forewall state to hybrid

What happens is that my LXC containers running tailscale would receive requests from tailscale0 interface but respond via LAN.

Apparently as I understood, consumer routers have assymetric NAT so that works fine, but not with opnsense.

Every guide I read online talks about installing tailscale on the opnsense router directly but I do not want to expose it to the tailscale network.

For now temporarily I set an ip route to tailscale0 and resolved it that way temporarily, but I still cannot get a solution that can help without compromising the firewall.

It’s also very cumbersome to do this for 50+ LXC containers over and over, even with running systemd scripts a problem might happen in the future

If you guys have any experience with this it would help a lot.