This is <tt>ettercap-NG</tt>.<br/>
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It requires <tt>libnet</tt> 1.1.2.1, which <a href="http://linux01.gwdg.de/~pbleser/rpm-navigation.php?cat=/Libraries/libnet/">is provided here as well</a>.<br/>
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It is currently only available for SuSE 9.1 as it requires a newer version of <tt>libpcap</tt>.