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tcpdump is a common computer network debugging tool that runs under the command line. It allows the user to intercept and display TCP/IP and other packets being transmitted or received over a network to which the computer is attached. It was originally written by Van Jacobson, Craig Leres and Steven McCanne who were, at the time, working in the Lawrence Berkeley Laboratory Network Research Group. Tcpdump works on most Unix-like platforms: Linux, Solaris, BSD, Mac OS X, HP-UX and AIX among others. In those systems, tcpdump is built upon the libpcap packet capture library. On Windows, WinDump can be used; it's a port of tcpdump to Windows. On Unix and most other operating systems, a user must have superuser privileges to use tcpdump due to its use of promiscuous mode. The user may optionally apply any number of filters to render the output more usable on networks with a high volume of traffic.
Common uses of tcpdump See also | ||||||||
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