Port Forwarding in OS X

arty · 31 Oct 2006 at 19:37

Due to various problems I've been having with my main PC, it's currently connecting to my network and thus the internet via Internet Sharing through my Mac Mini's wireless card. After a good bit of faffing to get them to talk together this is working fine, and I'd like to forward some ports from the Mac to my PC.

I can't seem to find the option to do this either in Internet Sharing or any of the Network windows. I've had a quick Google and not really found anything of help, so does anyone have any pointers as to where I can find the port forwarding options? Cheers

arty

arty · 3 Nov 2006 at 19:43

Sorry to bump, but does anyone have even any idea at all? I'm fairly up on networking so feel free to be technical if necessary

arty

Big-Mac-Please · 4 Nov 2006 at 16:14

Go into system preferences - sharing - firewall you can use the ones there or add your own

Hope that helps!

M0KUJ1N · 4 Nov 2006 at 23:23

if you're as up on networking as you suggest, OS X uses ipfw (which is the standard firewalling daemon for *BSD UNICes) therefore you could script it against ipfw, which is fairly similar to 2.2 linux kernel's ipchains firewalling.

arty · 5 Nov 2006 at 13:21

Big-Mac-Please said:
Go into system preferences - sharing - firewall you can use the ones there or add your own

Hope that helps!

Thanks, though that only seems to act as a fairly simple firewall rather than port-forwarding to external addresses.

M0KUJ1N said:
if you're as up on networking as you suggest, OS X uses ipfw (which is the standard firewalling daemon for *BSD UNICes) therefore you could script it against ipfw, which is fairly similar to 2.2 linux kernel's ipchains firewalling.

I've had a look at ipfw already and it almost looks good, but I'm assuming it won't actually re-route packets to external IPs. My guess is that I need to use NAT to do that, but I can't seem to find any NAT daemon configuration files on here (natd.conf or something like that). Oh the weird and wonderful world of Mac!

Will continue to poke around. Thanks anyway guys.

arty

Big-Mac-Please · 5 Nov 2006 at 20:36

Ok thought it was worth a shout

Good luck!

arty · 7 Nov 2006 at 20:18

Big-Mac-Please said:
Ok thought it was worth a shout

Good luck!

Thanks - I've tried messing about with a NAT daemon but in the end decided to hold off for my new network card on this computer which should negate the need to connect through the Mini, allowing me to do all the port forwarding stuff on my proper router.

The Mini will still be used for a fair bit of stuff, though

arty