Tool of the Day: tcpdump tcpdump is a common packet analyzer 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. Distributed under the BSD license, tcpdump is free software. Tcpdump works on most Unix-like operating systems: Linux, Solaris, BSD, Mac OS X,HP- UX and AIX among others. In those systems, tcpdump uses the libpcap library to capture packets. The port of tcpdump for Windows is called WinDump; it uses WinPcap, the Windows port of libpcap. • Tcpdump analyzes network behavior, performance and applications that generate or receive network traffic • It can also be used for analyzing the network infrastructure itself by determining whether all necessary routing is occurring properly, allowing the user to further isolate the source of a problem. • It is also possible to use tcpdump for the specific purpose of intercepting and displaying the communications of another user or computer • A user with the necessary privileges on a system acting as a router or gateway through which unencrypted traffic such asTelnet or HTTP passes can use tcpdump to view login IDs, passwords, the URLs and content of websites being viewed, or any other unencrypted information. • The user may optionally apply a Berkeley Packet filter-based filter to limit the number of packets seen by tcpdump; this renders the output more usable on networks with a high volume of traffic.
version: 4.3.0 home page: www.tcpdump.org regards, dhanasekar _______________________________________________ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
