Well, keep in mind that services like canyouseeme are looking to see if the port is unblocked for unsolicited incoming connections. You can show as blocked on all of those ports and still play just fine on the emu. If you ask it to check port 80 it probably says blocked too, but you're here browsing the forums using that port.
If you're using a simple NAT then when you make the first outgoing connection it creates an entry in a table on your router that makes the packets coming back go to your machine.
That said, it is quite possible that your campus is blocking those incoming connections even if you've already made the outgoing connection, and the only way to know that is to ask the IT guys.
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