Hello, I would like to annouce Etherbat, a tool for Ethernet topology discovery which I presented on Confidence 2007 conference in Krakow, Poland. Etherbat performs topology discovery between 3 hosts: the local machine and two other devices. It could be usefull for an administrator tracking an intruder, an auditor performing a security audit or an attacker trying to find out more about the network structure. Etherbat could be described as layer 2 equivalent of traceroute. No manageable switches nor extra software on remote hosts is required. Etherbat is released under GPLv2 license. Etherbat homepage: http://etherbat.cryptonix.org -- Pawel Pokrywka https://secure.cryptonix.org