I have Little Snitch on my iMac (OS 10.6. set to ask each time an appplication wants to access a port. When simply logged in to Skype (not making a call), Skype generates an endless stream of different requests to use ports even when I give each one permission forever. What is going on? Is this normal?
It's normal. Skype (IIRC) is a peer-to-peer system, which uses users' computers to shuttle calls hither and thither.
Entia non sunt multiplicanda praeter necessitatem.
Thanks. Maybe this explains why for no discernible reason my broadband usage started busting the 40GB a month limit I had before switching to BT Infinity.