This morning I replaced a switch that did not have PoE (power over ethernet) with a new one from Dell which does. This game me two PoE switches, as I had one already.
Let's call them Switch A (existing) and Switch B (new).
Subsequent to that I rebooted the domain controller and then logged in the 15 computers. All the computers work fine and access services on the server including email and reach the Internet successfully.
However I cannot access Internet from the domain controller itself.
I get the following error when I launch Mozilla Firefox...
The connection was reset.
The connection to the server was reset while the page was loading.
In IE I get error...
The page cannot be loaded.
The server's static IP settings point DNS to 127.0.0.1.
In the DNS utility, the forwarders are set to 18.104.22.168 and 22.214.171.124.
As I mentioned, all user PCs and another member server are set to get their DNS resolution through the server at 10.0.0.101. I have checked the static IP on the server and that is correct.
I have tried the following with no fix...
Server's DNS Service...
scavenge stale resource recordsupdate server data files
on server ... in DOS box ... ran ...
changed ethernet cable from server to Switch. (Never changed switch server was on. always Switch A.)
can ping www.yahoo.com
checked settings on both web browsers and they are the defaults
reconfiured AVG 8.0 File Edition antivirus on server so Web Shield and Linkscanner are OFF, in case something changed there.
the server does not have an onboard software firewall running
WHAT DO I LOOK AT NEXT? I'M NOW BAFFLED. THANKS!