knock

Section: (1)
Updated: June 26, 2005
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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 specified 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>


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
SEE ALSO
AUTHOR

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