I have been trying and trying to log into my Arris Modem and Router. I have reset both numerous times and still get invalid user id password error message.
Like the performance of the Arris modem and router, but it has been true disappointing pain trying to log into the modem and router to change default username & password for more security. I would also look at other settings, etc.
Looking at others questions and comment this must be a pain for many users!
I have used Netgear products in the past and never had issues like this logging into the router, etc.
Arris you should be better than this!