Quote Originally Posted by dino195
Since nobody else has said it I would like to advise you to never, ever under any circumstances post you MAC address "HWaddr 00:400:75:41:1E" on the internet. That's like giving your home address out.
Perhaps nobody has ever said it because it is complete nonsense. MAC addresses can't be routed across the Internet. TCP/IP deals in terms of IP addresses (and there is no simple way to hide your IP address and still get responses from the websites that you visit, since they need it to know where to respond).

If you wish to prove me wrong, my MAC address is 00-A0-CC-E8-48-D3. You have my permission and blessing to do anything that you would like to that MAC address from across the internet, as long as your attack is MAC address related and not IP related (you may not, for example, do a DNS flood on my IP address unless you can show how you obtained it by knowing my MAC address).

MAC addresses are the basic low level addressing scheme of ethernet. But they will not get past the first router or firewall. And anyone else on that side of the router can easily learn all of the MAC addresses attached to it by "sniffing the link" and watching local packets. Ethereal, which is included with Knoppix, is one of many programs that will let you do this. So you can't hide your MAC address from other users on your local LAN, and it's of no use to people on the other side of the world.