DHCPListener release 1.4
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	Web home: http://www.nts.ku.edu/downloads/DHCPListener/

DHCPListener is a proof of concept Java application for passively 
fingerprinting remote host operating systems on networks using DHCP. 

It works by parsing UDP packets destined for port 67. If such packets are
determined to be DHCPDISCOVER or DHCPREQUEST messages, the contents of DHCP
option 55 are examined and compared to entries in the fingerprints.txt file.

If a match is found, DHCPListener generates an XML message showing (among
other things) the remote host's operating system.

Usage:

java DHCPListener ../conf/fingerprints.txt

As with most *nix applications, the output may be redirected to a file. Please
submit new signatures to dphull@ku.edu.

DHCPListener was developed by the software engineering team at the Networking 
and Telecommunications Services division of Information Services at The 
University of Kansas.