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I don't think PD supports any kind of protocol encryption, the same way BitTorrent does. All data exchange is encrypted, but I'm not sure if the protocol is.
The port used by PD can be configured inside the program, it selects a random one when you install it.
The most important thing is that you get a publicly routable IP address, without a firewall/router that blocks incoming connections in front of it. PD simply can't work if others can't connect directly to you.
(Note that the campus does have a router between you and the rest of the internet, that's how the internet works. They most likely block most or all kinds of incoming connections and you won't be able to do anything about it.)
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