Am currently opening the ports on my router (3 Com 3CRWDR100A-72 ) as per the guide in portforward.com for MIRC. In the guide it is opening a total of 20 ports for MIRC.

The problem ive got is, I have some ports already open for other applications & my router seems to only let me open a total of 20 ports.

When 20 ports are open there is no "add" button to open anymore.

Is there a way I can open more ports?
Or any ideas what to do?
(Would opening just 10 ports for MIRC be ok)?

Also may seem like a stupid question, but if you disable your firewall in your router then you obviously don't need to forward any ports??

just want that confirmed.

Many Thanks