In MacOS X 10.6, is Internet sharing over AirPort implemented as NAT or full-blown routing? The backing wired network is a corporate one, Ethernet with DHCP.
Can't find anything definitive from Apple, but the detailed testing done here by Princeton University indicates that it's NAT (and that it's inappropriate for use on their campus, so might well be for your scenario too).
ps ax | egrep '[ /](PID|boo|nat)'
InternetSharing from the
System Preferences. Type the same
You will be able to see the different daemons which
spawns under 10.6 or 10.7 .
The answer is…
InternetSharing does 3 things:
- address translation through
- address distribution through
- routing through
route(but I got this information through other means of investigation).