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Man Pages
KNOCKER(1) FreeBSD General Commands Manual KNOCKER(1)

knocker - An easy to use network security port scanner

knocker --host <host> [OPTION]

knocker is a simple and easy to use TCP security port scanner written in C using pthreads which is able to analyze hosts and all of the different services started on them.

-H, --host
host name or numeric Internet address to scan
-P, --port
port number to scan (single port scan only)
-SP, --start-port
port number to begin the scan from
-EP, --end-port
port number to end the scan at
-q, --quiet
disable console output and logs to file.
-lf, --logfile <logfile>
log the results to a specified file.
-nf, --no-fency
disable fency output
-nc, --no-colors
disable colored output
--configure
let the user configure knocker
-h, --help
display this help and exit
-v, --version
output version information and exit

To run this program the standard way type:

knocker --host 192.168.0.1

If you want to specify a port range to scan:

knocker --host thehost --start-port 1 --end-port 2600

or

knocker -H thehost -SP 1 -EP 2600

To scan a single port:

knocker -H thehost --port 21

To run this program not using colors (if your terminal does not support colors):

knocker --host 192.168.0.1 --no-colors

To run this program run in background and have the results written in a log file:

knocker --host 192.168.0.1 --quiet &

The latest version of this program can be found at https://knocker.sourceforge.io

See the BUGS file in the knocker source package for a list of known bugs. Report bugs to <g.giorgetti@gmail.com>

knocker is written by Gabriele Giorgetti <g.giorgetti@gmail.com>

Copyright © 2001,2020 Gabriele Giorgetti
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
DECEMBER , 2020

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