Silent, multi-layer security for your organization.
Port knocking: a stealthy system for network authentication across closed ports
Port Knocking has not been seen on TV

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Perl prototype: v0.30

  • pcaplib support added; daemon no longer requires firewall log file

2004-Nov-14 18:59 | ...more

new Net::Pcap support added to sniff packets directly ...more

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Please do not link to these images directly from your pages - make a local copy. If you would like to contribute any artwork, let me know.

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Port Knocking (c) 2002-2017 Martin Krzywinski

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(c) 2004 by c't 14/2004

Port knocking and the perl implementation were the subject of an article by Christopher Kunz in the German computing magazine c't (magazin fur computer technik) (issue 14/2004). The article featured this image of a penguin, which I really like.

last updated 2004-Jul-08 14:51
Port Knocking (c) 2002-2017 Martin Krzywinski