Ettercap is a suite for man in the middle attacks on LAN. It features sniffing of live connections, content filtering on the fly and many other interesting tricks.
It supports active and passive dissection of many protocols (even ciphered ones) and includes many feature for network and host analysis.
For downloads and more information,
visit the Ettercap homepage.
Great tool for the classic man-in-the-middle attacks. The original developers haven't worked on since 2005, but there's a small community of developers on GitHub still fixing bugs and adding features. Check it out at https://github.com/drizztbsd/ettercap
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