When you type ipconfig /all the "default gateway" is usually the router IP address.
If you can't connect using your browser, then maybe HTTP is using another port or is disabled.
try connecting through port 8080
http://yourip:8080
Better try to install a port scanner and see which ports are open. (I suggest nmap)
There should be at least one port open for configuration.
When there is no http, it's usually telnet (port 23) or ssh (port 22)