Hey guys
Thanks to this forum i finally have OSX running on my PC!
But the thing is: My PC is on the second floor of my house, and so is my Xbox 360 which is connected to my PC for internet (my PC has Wifi).
I can setup internet sharing and stuff. And it will work. But i get a Moderate NAT and so i cannot join some of my friends or go into chat with them.
When i had XP, i used to bridge the connection between my wireless card and my Ethernet, which still gave me moderate NAT, but i could join all my friends and stuff.

Here's my setup with ip

1.Modem/router->2.Wireless Router->3.PC Wireless->4.PC Ethernet->5.Xbox 360
192.168.1.1........192.168.1.2.........192.168.1.19....192.168.2.1......192.168.2.2

I already opened ports on on router 1. (setting it up to forward to router 2) and Used DMZ on router 2 to forward to my pc, i also turned my firewall of in osx (atleast i think so)
So i should get open NAT (even though its wireles, becuase an other friend of my has it to), but i dont

any help?

Open up Preferences, and go to sharing, and configure "Internet Sharing".

I want to know how i can bridge my 2 connections

for file sharing etc from OS X to 360 I use rivet not sure if thats all you want to do?

no its just i want to bridge my ethernet and wifi connection; wich is something different then internet connection sharing.

Try the following:
open Terminal application and issue the command:
sudo sysctl -w net.inet.ip.forwarding=1
--- and you will be asked for an administrator password
after the command is executed your MAC OSX will act as an IP router.
I don't know if this what you actually want !!!
In case it is you can in a second step insert the command into an applescript to be run at login
To check the current value is enough to issue: sudo sysctl net.inet.ip.forwarding

NOOO! Dont use Terminal!
Use System Prefs!
Sharing > Internet Sharing
Configure your prefs (so share AirPort to Ethernet)