Which ports should I open and map to optimize for gnutella clients? eg, should UDP 6346 be added as well as TCP 6346? MAGNET?

my NAT software tech support has asked "If you could direct me to a single page or reference which outlines the technical details of how Gnutella works (on which ports it listens), then I might be in a better position to examine your setup."

Would someone recommend such a link?

btw--just found I could search for UDP in these forums; thought the search engine had restricted this . . . user error