Connect to web Ui of remote client

Newbie here… How do I connect to the web ui of for example, my router on the other network? I’m not able to ping any devices on the remote side.

Normally I can bring up a browser and type the ip address to get to the web interface from inside the network.

I am able to connect to the drives attached to the computer that has the tailscale client installed by using its public tailscale ip address .

If tailscale is not installed directly on a particular device, such as a router, then you’ll need to use some other linux box on the same network as your tailscale subnet relay. Detailed information is here: https://tailscale.com/kb/1019/subnets