Skype

Ok, I've been using Skype VoIP for a few months now, and am generally happy with it, but the last couple of days I've been having trouble with it...the person on the other end cannot hear a word I say. So, I started digging around their support site and found this:

Try opening UDP traffic both ways to both the port found in Skype's "Connection" window in Tools > Options and also ports 80 & 443 - tick the option to use the ports and open both TCP and UDP traffic to all three - keep in mind UDP traffic's availability for Skype results in better sound quality than just data traversal over TCP.

So, I found the number for the port...now how the heck do I change the settings for the three ports?