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We have several outside users who connect to our server using the external IP. Everything has been configured correctly and it has worked for several years.
Two days ago we had a test firewall (new brand) plugged into the switch before our main firewall and it was assigned the same static IP as the server that people remotely connect to. I unplugged the test firewall and flushed the DNS cache on the server, but it still isn't allowing an external connection.
Well a disconnected firewall can't block traffic. So this leads me to believe the configuration of the main firewall had been changed. Do you have a backup of the working firewall configuration? – Ramhound – 2013-12-06T15:51:28.193
I do have a backup of the main firewall config. I know that it hasn't been changed though, I'm the only one who logs into it. I will keep this in mind if nothing else works today. Thanks for responding! – User Name Taken – 2013-12-06T16:01:55.350
You plugged all the cables in their original location? You could try doing a restart, I have been shocked, what a simple restart will fix. – Ramhound – 2013-12-06T16:16:11.667
Nothing from the original network setup has been changed one way or another. The only thing different was the extra firewall we were testing on the switch before the main firewall. That setup has been unplugged completely now though. I do want to restart, but I can't really do that during business hours. I will have to wait and do it at 5pm. It's our month end time right now and most of the people who are using it are accountants, so they need all the time they can get as it's their busiest time. – User Name Taken – 2013-12-06T16:21:18.220