How To Install And Use Tcpdump For Traffic Analysis
The tcpdump and Snort tools are an old mainstay of network debugging and security monitoring, and security experts all over the world swear by its usefulness. It is a command line tool that eschews all the makeup and jewelry of other traffic analysis tools such as Ettercap and Wireshark, both of which provide packet sniffing functionality with a convenient GUI interface.
In contrast to such tools, tcpdump takes a command at the shell, with options specified at that time, and dumps the results to standard output. This may seem primitive to some users, but it provides power and flexibility that isn’t available with the common GUI interface alternatives.
Prerequisites include: Linux server