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14 lines
419 B
Markdown
14 lines
419 B
Markdown
# Set up port knocking
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Technique where a daemon keeps listening on specific ports for a specific sequence of connections.<br/>
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When the correct sequence is used, the daemon issues a configured command, usually to open a defined port for the client only.
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This is frequently used to open the SSH port in a server for a specific client.
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## Further readings
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- [Knockd]
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<!-- internal references -->
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[knockd]: knockd.md
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