Traffic analysis almost for free, part 2
Source: ZDNet - Posted by Benjamin D. Thomas   
Intrusion Detection IPtraf is a console-based network monitoring utility for Linux (the latest version, 2.3.1, is available for download). Written by Gerard Paul Riker, IPtraf tops my list of easy-to use-network analysis tools. IPtraf is distributed in a compressed tar format, and . . . IPtraf is a console-based network monitoring utility for Linux (the latest version, 2.3.1, is available for download). Written by Gerard Paul Riker, IPtraf tops my list of easy-to use-network analysis tools. IPtraf is distributed in a compressed tar format, and the full source code is included. But don't worry, a ready-to-run executable file is included in the distribution so you won't have to spend time compiling this package. Uncompress the archive -- typing tar -xvfz iptraf.tar.gz at the command line will do the trick -- and copy the executable file to /usr/bin.

Before you begin capturing traffic, you need to configure IPtraf. up Launch the application and select the "configuration" menu item. We're interested in three settings: TCP/UDP service names, logging, and logging interval. Enable service names and logging, and set the logging interval to 5 minutes.

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