My imac is hooked up to the internet via xfinity WLAN router Arris TG 862. wifi network works just fine.
Now, I tried to initially get into the configuration menu of the router via http:10.0.0.1. I entered username "admin" and password "password" as described in the user manual page 8. The message "authentication failed" comes up. I then disconnected power supply of the router and pressed reset for 20 sec. tried to log in again. same error message.” Can anyone help there? Do I need to connect an ethernet cable to get access to the router?
Not saying this will solve your issue, just an FYI. When resetting a unit back to factory defaults, the unit needs to be powered on when the reset button is depressed. Hold it in for 30-40 seconds or so.