If someone has a list of the ports that Messages uses I would appreciate that answer here. Extra votes and thanks for providing a reference.
I have searched the knowledgebase and found this, but it only lists iChat ports. I'm assuming Messages replaces iChat, but do they use the same ports? Barring a direct answer, is there an easy way to figure this out with Netstat or some other utility?
Best Answer
Using Little Snitch, it reported when Messages is fired up, the following:
And for posterity, here is what the 'FaceTime' application reports as connections, since you can call it up from Messsages (camera icon next to user you're messaging's name):
If anyone finds anything different, please add to this answer. (Making it community wiki).