Don't know if this is the right place to post this but:
I live in a place where internet is provided by two Ethernet wall plugs. We are allowed to connect our own router for wifi and whatnot. Problem is after connecting the router to the plug in the wall I can no longer access my routers configuration and the configuration of my router seems to have changed. I can factory reset my router and turn it on without it being plugged into the wall and I can easily access it. So I tried changing the routers settings page ip. But I after plugging it back into the wall, I can't access it. I don't really know what to do, or what's happening except a guess to some autoconfiguration being provided by the router my router is connected to?
Update: I had the router only connected to my pc, I changed the ssid and the default gateway disappeared and I couldn't access the web interface