I can't pull up GTAM at work anymore, but it appears that this is a problem at the far end and not it being blocked here. A traceroute gets as far as Liquid Web's network then it dies off. Anything going on?
If you were IP blocked then even ICMPs wouldn't get through. It's one of the ways to deal with less elegant (ie. fixed IP) DOS attacks.
If your work is a large org, there could have been more then one person at work using the site. Person was a ******, blocked account and IP (you will both only have one public IP address showing for outbound traffic)
Right, that's what I'm saying - I don't think it was a proxy issue, because I could not ping GTAM.
Did you verify that the IPs being routed to, for GTA, were the same at work and home? I don't know how Paul has the server set up but it's conceivable that there was an IP change, to the site, and your work network is running an independent DNS. The updates might not be all that "timely."