I am having trouble accessing a remote FTP Server that uses active connection from behind our TMG 2010 firewall.
I have the FTP access rule set to allow active connections and I have turned off Read Only on the access rule allowing connections to the remote FTP server.
When I try to connect though FileZilla I get the message
"Connection Established, waiting for welcome message"
followed by
"Connection timed out"
Looking at the TMG logs I see the connection initiating successfully:
Initiated Connection CELESTIXMSATMG 7/26/2012 1:26:16 PM
Log type: Firewall service
Status: The operation completed successfully.
Rule: Emp Access - TD FTP
Source: Internal (XX.XXX.XX.XXX:16724)
Destination: External (XX.XXX.XXX.XXX:21)
Protocol: FTP
Then a similar message saying the connection closed (after it times out). I can't figure out for the life of my why the connection won't go through?