Module 1: TCPDump
Tcpdump is an open source command-line tool for monitoring (sniffing) network traffic. Tcpdump works by capturing and displaying packet headers and matching them against a set of criteria. It understands boolean search operators and can use host names, IP addresses, network names, and protocols as arguments.
References:
http://searchunifiedcommunications.te...
TCPDUMP/LIBPCAP public repository. (n.d.). Retrieved February 28, 2015, from http://www.tcpdump.org/