I don't have experience with FSecure firewall (with AV I have quite nice but updating and scan was way too long for me..) anyway, I was browsing in the comodo forums earlier and found a quite good tutorial there.

I actually printed it in pdf (the thread was quite long really but will read it at my liesure) and will check it out..find it to be very interesting.

The ports that you have open are there in discussion.

Link is here:

Though again you are using FSecure there is a link there about ports that are needed to be closed. Hope this may serve as additional info on your side.