Thanks for your Help. I could access the UI from a different Computer. Very strange. Both are in the same subnet connected to same Switch.

I already tried restarting it without success. And how can I restore factory Defaults if the UI is not reachable?

Region : Germany Model : TL-R480T+ Hardware Version : V5 Firmware Version : ISP : Hello, When I type in the address of the Router the User Interface does not open anymore. I get an internal...