Just an FYI:
ICS = Internet Connection Sharing. Windows Firewall is a separate “function” in Windows XP. It sounded like you were using ICS to connect the 2nd computer to the Internet.
To answer your “fast question”: If the computer with Comodo Firewall installed is the one which is connected to the internet, the rules here will also affect the 2nd computer. Kinda like a perimeter firewall will.
2nd PC ||–x-over cable–> Primary PC ||–regular cable–> DSL router/Modem ||—> Internet :o
Please excuse my poor ASCII drawing skills
As I supposed, Comodo is not forwarding the port itself, it is just allowing it.
So, I only had to go to the connection properties, and on “Advanced” tab, define the port forward. As I had allowed the port previoulsy, it worked immediatelly! :o)
Following that, I saw a rule automatically created I didn’t liked: allow any port to any port, from any IP to any IP (in/out)… So I deleted it I lost internet connectivity on my browser ehehehe.
It was a very good way to learn a bit more about this software… Looking at logs to find out what is being blocked, and allow only the necessary rules for it. Had to do this to access DNS, and allow port 80 and 443, among some other things.
Thanks everyone. I am really loving this firewall. Not so easy-to-use, but still very interesting!