Our office has a pretty basic network setup. Comcast internet service connected to a SonicWall router, which then has an Apple AirPort wireless router and and a linksys 8 port switch. We only have one SBS 2008 server acting as the domain controller and DNS server.
No changes have been made to any network components, but today we are unable to browse to any .org sites. .com, .net and other domains come up just fine at this point.
I am stumped as to what could be causing such a specific block, and am not sure what information would be pertinent to fully troubleshoot this.