I'm fairly new to home networking. I've got a Windows 7 machine and Mac OS X 10.7 (Lion) machine connected to the same home network via a wireless Netgear router. I can ping the Mac from the Win7 PC by default, but I can't go the other way around (ping attempts time out).
Can someone who is more enlightened in the area of networking explain how to enable pinging the Windows 7 machine from the mac? Naturally I'm ultimately hoping to do more than pinging, but this first step's hanging me up.