[MTH]

I've recently bought a Mac Mini and I want to connect to the internet using my existing wireless network setup. I have a cable modem connected to a wireless router/access point.
The Mac Mini finds the wireless network and are able to connect and obtain an IP address. However, I cannot get an internet connection. Using the very same setup on a PC it works fine. If I connect the Mac Mini with an ethernet cable directly to the router it works fine and I can access the internet.

Any ideas???

[ink]

Can the Mac Mini ping the PC (you have to disable the Windows Firewall in order to allow ping with Windows XP)? If so, then the problem is on the router. If not, then the problem is elsewhere.

[MTH]

I can't ping the PC from the Mac Mini, but in order to get an internet connection I shouldn't have to go through the PC.
Despite getting an IP address from the router using DHCP, I'm not able to ping the router either. When I connect with an ethernet cable to the router it works fine and I'm able to ping the PC.

[ghporter]

Open Terminal and type "ifconfig" (without the quotes, of course). en0 should be your built in ethernet adapter, and en1 should be the AirPort card-see what IP address ifconfig reports (it reports a LOT of data, look for a number of the form 123.123.123.123). If the number starts with "169...." then your computer doesn't have an IP at all (169. numbers are "self assigned" because network adapters have to have some IP, even one that doesn't work at all).

Depending on your router brand and model, you could have almost any other IP range show up. Linksys, for example, uses 192.168.1.X by default.

If you're getting a good IP, can you ping ANYTHING? Like forums.macnn.com? I get an IP for that address of 207.58.150.184 at the moment.