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Detect FTP injection - port<br />
Attack uses injected 227 response to punch hole<br />
Attacker cares about non-FTP ports maybe<br />
We can detect the port the attacker wants<br />
Éric Leblond, Victor Julien (OISF) <strong>The</strong> <strong>menace</strong> <strong>came</strong> <strong>from</strong> <strong>below</strong> <strong>Hack</strong>.<strong>lu</strong> 2012 44 / 66