can you telnet to any of your servers?
start > run
cmd {hit enter}
telnet serverhostname port#
(where serverhostname={the server ipaddress or hostname of the server you’re trying to connect to (found in vent client server setup)} and port#={port associated with that server}
(example: “telnet 75.125.43.51 3784” or “telnet www.myserver.com 3784” without the quotes)
If Telnet is able to connect then the screen will go blank. If not, then you will see an error message about not being able to connect.
Enabling Telnet in Vista/Windows 7
Control-Panel / Programs and Features / Turn Windows features on or off / select “Telnet Client” / click OK
how far does the traceroute get?
'connection closed' sounds like the connection is getting blocked somewhere along the netpath