Port forward for Wireguard server on internal network does not work any more [TOS6]

Software SW help
1

I have a Wireguard server on a host on my internal network. On TOS5 I setup a port forward for traffic from outside to this machine (UDP). It worked well.

On TOS6 this setup stopped working. I tried to delete / add port forward again, I still cannot connect my outside client to the internal Wireguard server.

Other port forwards work.

Any ideas? Do I need to change my Wireguard setup in some way?

Note: Wireguard is not running on Turris, I just have a port forward to another host

2

So it does work if I’m outside my own network. This is a change from TOS5. What is the best way to solve it (so it works also from inside)?

3

Solved by adding custom hostname for Wireguard and resolv it to correct host from inside.