Hi, Is it possible for a person to figure out my mac adress through a gmail chat? If yes, i need to know how ? Also i was wondering if i can change my mac address. MissDummy

MAC address? Nope. Publicly displayed IP address? Perhaps. The MAC address is a physical address hard-coded into the NIC. The only way to change it is change the NIC. "So won’t you give this man his wings What a shame To have to beg you to see We’re not all the same What a shame" - Shinedown

Kind of depends. The mac could be found out possibly. Not sure it matters. There are ways to clone and spoof mac address. It has little to do with security. Why would you care about the mac address? "Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10