The default SBS 2008 firewall – THE OFFICIAL BLOG OF THE SBS “DIVA”:
http://msmvps.com/blogs/bradley/archive/2009/06/03/the-default-sbs-2008-firewall.aspx
Remember this post?
We’re updating it for SBS 2011 now.
http://msmvps.com/media/p/1799179.aspx
Zipped up copy of the SBS 2011 firewall rules
Please note exchange is on the C drive in this, so if you’ve moved Exchange, edit the rule(s) accordingly.
imported this to the Windows firewall and all connectivity issues in SBS 2011 went away, thanks Susan.
Hhhhmmmm. Something just popped into my head. I wonder what the difference is between a single NIC firewall and a 2 NIC firewall like ISA Server. I wonder if your losing some security there.