http://blogs.technet.com/b/chrisavis/archive/2011/10/03/unable-to-rdp-to-tmg-server-error-a-connection-was-abortively-closed-after-one-of-the-peers-sent-an-rst-packet.aspxI have run into this pesky problem a few times now since moving from ISA 2006 to TMG2010. I just ran into it again this evening and decided to post the results of my troubleshooting. In this case i am working on a brand new (2 week old) install of TMGen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)