The tools of the trade
There are numerous free and commercial packet sniffers, very often named network analyzers, in the market, and selecting the one that best meets your need is a matter of choice. There are several factors to determine this, such as the operating system in use, supported set of protocols, ease of use, customizability, and of course budget. The following are the popular ones:
- Tcpdump: Tcpdump is a free and popular command-line packet capture utility, which can come in very handy in the absence of a GUI-based tool. However, even after capturing traffic via tcpdump, one can analyze and interpret the traffic using any GUI-based free or commercial tool, as it is visually easy. Refer to TCPDUMP Overview at http://www.tcpdump.org/manpages/tcpdump.1.html ...
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