Troubleshooting TMG firewall problems can be easy or it can be hard. It’s hard if you don’t have the right tools and it can be easy if you have the right tools and you know what to do with them. Remember, there’s power in matching the right tool with the right fool! 🙂
Check out this article to learn about five TMG firewall troubleshooting tools that’ll make your life a lot easier
http://www.isaserver.org/articles-tutorials/configuration-general/5-important-tools-troubleshooting-forefront-threat-management-gateway-tmg-2010.html
HTH,
Deb