Unable to access http://192.168.1.254/cgi-bin/securityoptions.ha, it gives a page not found error

This link allows you to access your internet using the access code on your fiber device, however, it began giving me this error today. It was working completely fine yesterday. 

No this has nothing with Internet access using the BGW320's Access Code. This page is related to the AT&T Active Armor feature. What is it you think you need on this web page? 

http://192.168.1.254/cgi-bin/firewall.ha

If you want to manage Active Armor settings you should be using the AT&T Smart Home Manager (SHM) app or the Active Armor Web interface: https://www.att.com/support/internet/home

Dave

Sorry, I didn't mean it allows you to access the internet, but I meant that I cannot access security options on that page.