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>