I need to open specific ports in the firewall - how do you do that?

Hi There,
I'm trying to setup a web development server on a spare mac mini but I can't figure out how to open ports for the MySQL server under Snow Leopard.
Is there a way to do this? I've set the firewall to allow MAMP to open ports whenever it needs to but when I do a port scan of the Mac mini the MySQL port doesn't show up - SSH, HTTP and VNC do however.
I'm happy to configure it via the Terminal but I can't find any info on how to do this in Snow Leopard as I think it's different from Leopard (based on what I've found online).
e.g.
$ ipfw show
Gives me an error:
"ipfw: socket: Operation not permitted"
Any help would be much appreciated
Cheers
Ben

After digging around it looks like Snow Leopard doesn't use ipfw for opening ports.
Does anyone know how to open ports in Snow Leopard? Apple don't seem to have any info on this - besides the allow incoming connections for certain applications.
Will try WaterRoof and see what happens.
Cheers
Ben
Message was edited by: Ben Sciascia

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After digging around it looks like Snow Leopard doesn't use ipfw for opening ports.
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Will try WaterRoof and see what happens.
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Message was edited by: Ben Sciascia

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