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tldr/pages/linux/knock.md
Managor ae436c1b00
linux/*: add option placeholders (#16192) 
* batch1

* batch2

* batch3

* batch4

* Update matchpathcon.md

* Update pages/linux/arecord.md

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

* Update pages/linux/arecord.md

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

* Update pages/linux/arecord.md

Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>

---------

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>
Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>
2025-04-19 21:21:53 +00:00

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knock

Port knocking client to open specific ports on firewall. More information: https://manned.org/knock.

  • Knock on ports using different protocols:

knock {{hostname}} {{portnumber}}:{{protocol}}

  • Knock on port using UDP:

knock {{[-u|--udp]}} {{hostname}} {{portnumber}}

  • Force usage of IPv4/IPv6:

knock {{-4|-6}} {{hostname}} {{portnumber}}

  • Display errors and details of connection:

knock {{[-v|--verbose]}} {{hostname}} {{portnumber}}