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43 lines
1.3 KiB
Groff
43 lines
1.3 KiB
Groff
.TH knock 1 "June 26, 2005" "knockd #VERSION#" ""
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.SH NAME
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knock \- port-knock client
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.SH SYNOPSIS
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\fBknock [options] <host> <port[:proto]> [port[:proto]] ...\fP
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.SH DESCRIPTION
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\fBknock\fP is a \fIport-knock\fP client. It sends TCP/UDP packets
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to each specified \fIport\fP on \fIhost\fP, creating a special knock
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sequence on the listening server (see the \fBknockd\fP manpage for more
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info on this).
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.SH OPTIONS
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.TP
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.B "\-u, \-\-udp"
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Make all port hits use UDP (default is TCP).
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If you want each port to use a different protocol (TCP or UDP), then you
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can specify the protocol on a per-port basis. See the example below.
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.TP
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.B "\-d <t>, \-\-delay <t>"
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Wait <t> milliseconds between each port hit. This can be used in situations
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where a router mistakes your stream of SYN packets as a port scan and blocks
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them. If the packet rate is slowed with --delay, then the router should let
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the packets through.
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.TP
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.B "\-v, \-\-verbose"
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Output verbose status messages.
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.TP
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.B "\-V, \-\-version"
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Display the version.
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.TP
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.B "\-h, \-\-help"
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Syntax help.
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.SH EXAMPLES
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.nf
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knock myserver.example.com 123:tcp 456:udp 789:tcp
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knock -u myserver.example.com 8284 4721 18592 42912
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.fi
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.SH SEE ALSO
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\fBknockd\fP is the accompanying port-knock server.
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.SH AUTHOR
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.nf
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Judd Vinet <jvinet@zeroflux.org>
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.fi
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