34 lines
694 B
Text
34 lines
694 B
Text
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#!/usr/bin/env bash
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#
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# Sends a http request to a URL and a port. This is used to knock on port to
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# open other ports. See: https://wiki.archlinux.org/index.php/Port_knocking
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#
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# Using this in your `.ssh/config` as a proxy command can be a nice way to
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# automatically knock on ports before connecting with ssh.
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#
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# Example:
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#
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# ```
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# ProxyCommand bash -c '/home/ade/.dotfiles/bin/knock %h {port_number}; exec /bin/nc %h %p'
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# ```
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#
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# Author: Ade Attwood <code@adeattwood.co.uk>
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# Created: 2019-07-11
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#
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#
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# Set off the http request
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#
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curl --max-time 5 http://$1:$2 > /dev/null 2>&1 &
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#
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# Wait for a fuw seconds
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#
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sleep 2.5
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#
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# Return a success code to carry on the ssh connection
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#
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exit 0;
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