PortKnocker

PortKnocker is a project to run a simple port knocking client for UDP and TCP connections.

Basic usage

PortKnocker -i 192.168.0.1 -u 23                    Knocks with UDP on 192.168.0.1:23.
PortKnocker -i 192.168.0.1 -u 25 -u 26              Knocks with UDP on 192.168.0.1:25 and 192.168.0.1:26.
PortKnocker -i 192.168.0.1 -u 38 -p test            Knocks with UDP on 192.168.0.1:38 and sends the string 'test'.
PortKnocker -i 192.168.0.1 -u 40 -b 0103            Knocks with UDP on 192.168.0.1:40 and sends the hexadecimal value '0x01 0x03'.
PortKnocker -i 192.168.0.1 -i 192.168.0.2 -u 23     Knocks with UDP on 192.168.0.1:23 and 192.168.0.2:23.
PortKnocker -i 192.168.0.1 -t 24                    Knocks with TCP on 192.168.0.1:24.
PortKnocker -i 192.168.0.1 -t 32 -t 17              Knocks with TCP on 192.168.0.1:32 and 192.168.0.1:17.
PortKnocker -i 192.168.0.1 -t 11 -p test            Knocks with TCP on 192.168.0.1:11 and sends the string 'test'.
PortKnocker -i 192.168.0.1 -t 42 -b 0103            Knocks with TCP on 192.168.0.1:42 and sends the hexadecimal value '0x01 0x03'.
PortKnocker -i 192.168.0.1 -i 192.168.0.2 -t 25     Knocks with TCP on 192.168.0.1:25 and 192.168.0.2:25.

Checkout the examples in the PortKnockerTest project as well.

Hints

The -b option will overwrite the -p option if both are specified.

Commands

PortKnocker                   Commands manual                   PortKnocker

NAME
     PortKnocker — I'm the one who knocks.

SYNOPSIS
     PortKnocker { -i ipAddress { -u udpPort [-p packet | -b binary] | -t tcpPort [-p packet | -b binary]
                 | -u udpPort -t tcpPort [-p packet | -b binary] } | -h }

DESCRIPTION
     PortKnocker is a program to run a simple port knocking client for UDP and TCP connections.

     The options are as follows:

     -i || -ip          Specifies the IP address(es) to knock on.

     -u || -udp         Specifies the UDP port(s).

     -t || -tcp         Specifies the TCP port(s).

     -p || -packet      Specifies the packet.

     -b || -binary      Specifies the packet (in binary form).

     -h || -help        Shows the help.

DEFAULT VALUES
     Packet         0x00 0x01
SEE ALSO
     Port knocking, https://en.wikipedia.org/wiki/Port_knocking.
AUTHORS
     PortKnocker is a free software provided under the MIT license. It is written by SeppPenner.

Haemmer Electronics               Feb 26, 2020              Haemmer Electronics

Further links

• https://github.com/sebastienwarin/Knock
• https://en.wikipedia.org/wiki/Port_knocking
• https://github.com/xamarin/XamarinComponents/tree/master/XPlat/Mono.Options

Change history

See the Changelog.