By default PowerShell will use the following ports for communication (They are the same ports as WinRM)
TCP/5985 = HTTP
TCP/5986 = HTTPS
While I would recommend you stay with the defaults, If you are not happy with this or your security team is not happy with this there are some other choices
So who has recently looked at Diagnostic Logging in SharePoint 2010? And who has sat there and compared it to SharePoint 2007, it's getting more complex but so much more useful.
For those of you who are still learning. Diagnostic logging is where SharePoint logs it's actions, and will do with varying degrees based on the verbosity that you set for it.