ettercap-common - 1:0.8.2-10+b2 main

Ettercap supports active and passive dissection of many protocols
(even encrypted ones) and includes many feature for network and host
analysis.
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Data injection in an established connection and filtering (substitute
or drop a packet) on the fly is also possible, keeping the connection
synchronized.
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Many sniffing modes are implemented, for a powerful and complete
sniffing suite. It is possible to sniff in four modes: IP Based, MAC Based,
ARP Based (full-duplex) and PublicARP Based (half-duplex).
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Ettercap also has the ability to detect a switched LAN, and to use OS
fingerprints (active or passive) to find the geometry of the LAN.
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This package contains the Common support files, configuration files,
plugins, and documentation. You must also install either
ettercap-graphical or ettercap-text-only for the actual GUI-enabled
or text-only ettercap executable, respectively.