Yip a uni firewall

Set default deny in both directions. So 6346 is blocked

I have ports that I can connect on eg 22 6000 etc

However!! I cannot connect everyone seems to say there should be no problem with connecting initially since it is like a web browser. but I can't!
It looks to me like gtk-gnutella /limewire is trying to connect to servers on port 6346. Hence blocked.
I know my web browsing runs through a SQUID proxy server not direct.
Would this be what is upsetting it?
Are there any linux gnutella clients that could use this proxy?

Many thanks