knock man page on Alpinelinux

knock man page on Alpinelinux

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knock(1)							      knock(1)

NAME
       knock - port-knock client

SYNOPSIS
       knock [options] <host> <port[:proto]> [port[:proto]] ...

DESCRIPTION
       knock  is a port-knock client.  It sends TCP/UDP packets to each speci‐
       fied port on host, creating a special knock sequence on	the  listening
       server (see the knockd manpage for more info on this).

OPTIONS
       -u, --udp
	      Make  all	 port hits use UDP (default is TCP).  If you want each
	      port to use a different protocol (TCP  or	 UDP),	then  you  can
	      specify  the  protocol  on  a  per-port  basis.  See the example
	      below.

       -v, --verbose
	      Output verbose status messages.

       -V, --version
	      Display the version.

       -h, --help
	      Syntax help.

EXAMPLES
       knock myserver.example.com 123:tcp 456:udp 789:tcp
       knock -u myserver.example.com 8284 4721 18592 42912

SEE ALSO
       knockd is the accompanying port-knock server.

AUTHOR
       Judd Vinet <jvinet@zeroflux.org>

knockd 0.5			 June 26, 2005			      knock(1)

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