Login error in 192.168.100.1 Login error in 192.168.100.1 Rachel Grate (Programmer) (OP) 5 Jul 20 09:16 Hey, I have MI Router 4C, My problem is that I can't open the router settings page by using 192.168.100.1 IP Router, Is there any solution to this problem? RE: Login error in 192.168.100.1 goombawaho (MIS) 3 Aug 20 21:57 192.168.100.1 is often the address of a Arris SurfBoard modem. Are you sure it's the address of your router? At a CMD prompt, if you type ipconfig /all you will see what your router address (the default gateway number). You could also power cycle the router to see if it's in a half-hosed state from not having been rebooted for a long time.