Comments on: Mac OS X Port Forwarding with Internet Connection Sharing

By: Erik Stone

Erik Stone — Sun, 05 Sep 2010 14:55:11 +0000

You are a genius my friend. This is the only website that I have been able to find that actually explained how to do this. Other so called, experts, have even said there is no way to do this. Shows how stupid most of the experts really are, since this seems like pretty basic Unix if you know Unix. Thanks a bunch!

By: verma

verma — Sun, 18 Jul 2010 15:22:32 +0000

@David

It probably won’t ask you for a password if you ran the commands in reasonably quick succession. If you wait for a while before you run the second command, the system will ask you for a password. That’s how sudo usually works.

The IP address that you see on your xbox con page would be the right one to substitute on the command line. I think you are doing it right.

Either way, the best way to test if the things are going right is to test for connectivity from within xbox. HTH

By: Erik Stone

Erik Stone — Thu, 08 Jul 2010 08:07:46 +0000

Fricken awesome stuff! Thanks Verma.

By: David

David — Thu, 17 Jun 2010 05:18:49 +0000

Well, I have a few more questions now:

I typed in the first script and it asked for my password which I typed in and moved on to the second.

I typed the second part in substituting (what I believe to be) my IP Address of my XBOX. After entering that script, I did NOT ask to type my password. Should it prompt me that second time or not?

Sorry if this paragraph sounds like I’m completely unable to read to guide, but I just wanted to make sure. I say what I believe to be my XBOX’s IP above because I’m not sure if I’m entering the right thing. On my XBOX Conf. page, it says IP Address, Gateway and the two DNS servers. I used the one labeled IP Address. Is that the correct one? Thanks!

By: verma

verma — Thu, 17 Jun 2010 04:06:03 +0000

Hi David,

I am afraid I am not sure. I haven’t really every played with upnp.

By: verma

verma — Thu, 17 Jun 2010 04:03:45 +0000

Hi Tom,

In my case the two networks are different, sharing the wifi connection over Ethernet causes the Ethernet connection to be on a different network. Since the network is different, some sort of address translation is needed.

By: Tom

Tom — Sat, 12 Jun 2010 16:59:16 +0000

I have the same setup you have sounds like, except I’m using a slingbox instead of an Xbox.

What I was thinking is that, since the slingbox can reach *out* to the internet, but you can’t route *in* to it, isn’t this a problem that can be solved with routing, not nat’ing? For example, can the Mac Mini be configured to route the inbound traffic, as it does the outbound? I wouldn’t have thought NAT would be required for this. I may be missing something though (aside from the fact that I don’t personally know how to do this, which is obvious :) ).

By: 21bower

21bower — Sun, 21 Mar 2010 14:20:57 +0000

OH SWEET LORD thank you so much, you have no idea how long ive been trying to do this for, ahhhh, i was about to smash my router and now you have shown me the light,, thnk you so much

By: S

Thu, 28 May 2009 14:41:06 +0000

Nice solution! But I have a bit different setup. Don’t know how to fix it.
I use these lines to share my vpn connection via wifi:

sysctl -w net.inet.ip.forwarding=1
natd -s -m -d -n ppp0 -dynamic
ipfw add divert natd ip from any to any via ppp0

how do I alter these lines to start port forwarding to the certain IP?

By: Joe

Joe — Tue, 17 Mar 2009 20:02:51 +0000

ahhh looks like it’s too complicated that it deals with all those applescript and shell script. i guess i will try out the program Lighthouse, worse case i will have to manually input the script every time after the laptop restarts.

hopefully i can get rid of the NAT problem that i’m having with my xbox.

thanks