Sorry for the newb question, but I gotta know if any of the AVG packages in KES block ports?
It does not block ports. Kes uses AVG at the moment, which is nothing more than a management interface to a local AVG install. Blocking ports is a firewall function and not a AV function.
However, AVG does check traffic for virusses and extra functionality like linkscanner and/or webshield can be interfering with passing traffic to client/server.
Well, there is an option in KES2.1 to install the AVG Firewall. Although KES can install the Firewall it doesnt manage it, so you will need to do that locally on the device if you want to. It works well enough as I have used it on several laptops.