No router - ips on ipfire! but ok if it’s blank it’s not turned on.!.If you have access to the console from root type elinks you have to have access to the inbuilt browser (use the keyboard to navigate-not easy TAB to move space to select ESC for menu) see if reachable. other way can’t help further.
G70P
Edit:
If you can access webgui on ipfire machine trought the console, it may happen you have some security option in your PC blocking access. try other browsers or change some AV options?! Some extensions like HTTPS everywhere block webguis accesses