Server not listening

[freddyz77 at tin.it]

Is possible to have a server (a middle one!) that cannot listen to any 
port?? Imagine a machine witch is behind a restrict firewall... imagine 
even a "fascist" firewall! This machine cannot have any listen socket, 
you cannot set up a nat, however this machine can act as client. It 
would be fine if such as machine could become a middle server 
connecting to two or machine.

freddy77