LSE toolsLSE toolsKnock (211)Knock (211)

Tool and Usage

A port knocking implementation to make network ports to become stealth or trigger events based on a port knocking sequence.

Screenshot for Knock tool review


Knock implements the principle of port knocking. It does so by using libpcap to sniff network traffic on interfaces and then use that to see if it matches a predefined sequence of steps.

Tool review and remarks

The review and analysis of this project resulted in the following remarks for this security tool:


  • + Project is mature (10+ years)


  • - No updates for a while

Author and Maintainers

Knock is under development by Judd Vinet.

Knock alternatives

Similar tools to Knock:



Pyknock is a tool to perform UDP port knocking with HMAC-PSK authentication. It can be used to harden systems and limit access to specific network ports.


The utility is a rewrite of 0trace (by another author) to perform reconnaissance and bypass network firewalls.

See all alternatives tools for Knock »

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Project details
Latest releaseNo release found

Project health

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GitHub iconKnock GitHub project
 Knock website


This tool is categorized as a port knocking tool.

Related terms