The ip address 127.0.0.1 is called a loopback. Its for mainly diagnostic purposes. Say if you ping 127.0.0.1, you're initially pinging yourself. You would do this to test if your NIC was working or not if you had some type of connection problem.


As far as port 6364 goes. That is pretty much the standard/popular port used. The reason its that port, I have no idea. But you can specifiy the port you wanna use for people to connect to you, say if that port was already being used by something else. The port 80 thing....I think you got that confused with the type of requests gnutella clients give out. As in they are pretty much http requests for files and etc.