From: "Glenn Meadows" 

I believe those are the ports that Apple Remote Desktop uses.

We temporarily opened those on one of our NY firewalls so a contractor
could connect to an internal mac to do some setup work for the user.  Both
TCP and UDP are required.  Turn off the Remote Desktop Connection somewhere
in System Preferences and see if the ports get closed.

--

Glenn M.
"RobertB."  wrote in message
news:rb28-232A5F.17490108112006{at}w3.nls.net...
>I have two port numbers open on my Mac (10.4.7): 3827 and 5000. Not sure
> what they're used for. The first is unassigned (might be opened by
> iTunes). The second is complex-main, which is the standard designation
> for port 5000 (in my list of ports), although I'm not sure what that
> tells me. Anyone know?

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