VNC Server behind firewall not responding

[Bryan Roller]

I have a Squid proxy and firewall which allows me to connect to workstations 
(VNC servers) outside the firewall. When I try to connect to one inside, my 
traffic will reach the workstation (VNC server) but the outbound traffic 
will use a random port number (between 1200 and 1700 have been observed). I 
have verified this on a Win 9x workstation by using netstat -a -n and a 
utility called TDImon from Sysinternals. Even using a HTTP tunnel will not 
help because of the range of port numbers used to respond.

Is there a way to force the "server response" to use a defined port? I could 
then allow that defined port traffic through the firewall and all will be 
working. BTW, I can not specify a port range on my firewall or I would have 
tried that already. Thanks in advance.

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