Hi guys. This problem has been vexing me for a long time; I try tinkering with it every year or so and have never managed to get it to work. I am trying to share my mac's airport internet connection with my WinXP PC via ethernet. I'm running 10.6.5 on the Mac. Setting the PC to obtain an IP and DNS server address automatically results in the PC getting an IP assigned to it (by the mac or the router, I dunno) and it shows the router's IP as the default gateway. It seems to think that it is connected, but I can't load web pages.
In the PC's TCP/IP settings I have tried setting the DNS server address to the IP assigned to the Mac by the router. No dice.
In the same panel I have also tried setting the PC's IP address to the IP assigned to the Mac by the router. Still no luck.
I also tried setting the default gateway to the Mac's IP address, leaving in place the default subnet and an IP address I know is available on the router.
I have also tried these in various combinations, but to no avail. The only thing I haven't tried fooling with is the subnet mask, which I've left set to 255.255.255.0 (the router's default, of course.)
Scouring the internetz for help returned nothing of use...just lots of people with the same or similar problems posting "OMG CANT CONNECT TO INTERNET PLZ HELP!!!!!!!!!!!" with few or no coherent replies. If nobody here can help I suppose I will just have to finally accept the fact that the MacOS's internet sharing capabilities suck and Mac->Win via ethernet just doesn't work.