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quesion about finding first host

I'm new in Gnutella.In the Gnutella Protocol 0.6, it is said that a Gnutella servent connects itself to the network by establishing a connection with another servent currently on the network. I wonder how does the servent get other servent's IP adress?Using broadcast?How does it pass through gateway?
I get "Gnutella Protocol 0.6" from this page Gnutella Protocol Development
It is said that techniques for finding the first host are described in Appendix 3.But i don't see the Appendix 3 in this page....

Join The_GDF and browse the files there.

And have a look at the current specification: Gnutella Protocol Specification - Gnutella Specification