I think i was not that clear, if your wallet is online and unlocked it will "mine" PoS blocks, so if you have it 2 hs/day you will "mine" only those 2 hours. PoS mining has it's own difficulty (which is normally really low), but it will need coins 30 days old which will take from your balance, put it on stake, and then if "a PoS block is found" you get your stake back + any interest generated (sometimes 0..)
Hope this helps everyone understand how PoS minting works.

Yes, the client uses CPU to "mine" PoS blocks, so you are free to have you GPUs mining whatever you want.
It would be highly preferable to forward ports, so you have more connections, but it is technically not necessary. (DEV please check this im not 100% sure..)