Those aren't ports being monitored by the Network Shield, but the Mail Shield (all are email localhost redirect ports) with one exception, the Web Shield redirect on 12080.
The Network Shield monitors ports commonly used for exploits for worms, etc. like the DCOM port 135, there are a number of others though I don't believe avast will tell you what they are.
I don't believe you will see the network shield or the ports it is monitoring listed in the firewall logs.