Sniffer
¨Allows attacker to see everything sent across the network, including userIDs and passwords
¨NIC placed in promiscuous mode
¨Tcpdump http://www.tcpdump.org
¨Windump http://netgroup-serv.polito.it/windump
¨Snort  http://www.snort.org
¨Ethereal http://www.ethereal.com
¨Sniffit http://reptile.rug.ac.be/~coder/sniffit/sniffit.html
¨Dsniff http://www.monkey.org/~dugsong/dsniff
¨