it is my third month as a junior sys admin and my senior is on vacation.
Starting this past Tuesday, users have not been able to log in to a website while on our primary network. The web page loads and functions properly, but upon entering credentials, the page just hangs indefinitely. I suspected it was a DNS issue, so I removed the static IP that points to our AD server, rebooted the computer, cleared the DNS cache just to make sure, and tried using 8.8.8.8 and 8.8.4.4. No luck.
I went and plugged the user into our second network and they were able to log in without a problem. Anybody have any suggestions? I'm about to compare packet captures between the two networks to see if there is a problem. Now that I have DNS ruled out, I'm thinking that it might be a firewall issue although inbound traffic from both ISPs pass through the same firewall, and everything was working fine until this week. I contacted the site's admins and they just walked me through basic helpdesk stuff (i.e. clearing history, incognito mode, trying different browsers), but without a doubt this is an issue on our side.
