I am behind the firewall and I could not find any Gnutella servent running on firewall-friendly port like 80 or 21. can anyone help me to find the right one?
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Really, you could configure your current client to port 80, but it's no use. If you try it, you'll most suprisingly find that the rest of the internet is using that port, and it'll and take hours to connect. I'm not sure how strict your firewall is, but you should be able to connect fine using all-outbound connections, because your firewall will surely swallow all incoming connections.