In message <Pine.LNX.3.96.1000512075212.812B-100000@ogre.atl.netrail.net>, Bran don Ross writes:

On Thu, 11 May 2000, Owen DeLong wrote:

...

Right answer, wrong reason. The originating host will be easy to identify because the MAC address of the originating machine of the ECHO-REQUEST packets will be contained in the packets.

I have to strongly disagree, MAC addresses don't make it across router boundaries, source IP addresses do.

Besides, MAC addresses are quite often changeable. --Steve Bellovin