Released last December, TMG is the next generation of Internet Security and Acceleration (ISA) Server 2006. It is a secure web gateway that allows employees to safely and productively use the Internet without worrying about malware and other threats. TMG provides multiple layers of continuously updated protections against the latest Web-based threats, including URL filtering, antimalware inspection, and intrusion prevention. Enhancements in TMG Service Pack 1 (Available for download here):
Improved reporting features
Enhancements to URL filtering
Enhanced branch office support
Support for publishing SharePoint 2010