man knockd Command

Man page for apt-get knockd Command

Man Page for knockd in Linux

Ubuntu Man Command : man knockd

Man Knockd  Command

This tutorial shows the man page for man knockd in linux.

Open terminal with 'su' access and type the command as shown below:
man knockd

Result of the Command Execution shown below:

knockd(1)                                                                                                                                                  knockd(1)

knockd port knock server

knockd [options]

knockd is a port knock server. It listens to all traffic on an ethernet (or PPP) interface, looking for special "knock" sequences of port hits. A client
makes these port hits by sending a TCP (or UDP) packet to a port on the server. This port need not be open since knockd listens at the link layer level,
it sees all traffic even if it's destined for a closed port. When the server detects a specific sequence of port hits, it runs a command defined in its con Äê
figuration file. This can be used to open up holes in a firewall for quick access.

i, interface <int>
Specify an interface to listen on. The default is eth0.

d, daemon
Become a daemon. This is usually desired for normal server like operation.

c, config <file>
Specify an alternate location for the config file. Default is /etc/knockd.conf.

D, debug
Ouput debugging messages.

l, lookup
Lookup DNS names for log entries. This may be a security risk! See section SECURITY NOTES.

v, verbose
Output verbose status messages.

V, version
Display the version.

h, help
Syntax help.

knockd reads all knock/event sets from a configuration file. Each knock/event begins with a title marker, in the form [name], where name is the name of the
event that will appear in the log. A special marker, [options], is used to define global options.


Related Topics

Apt Get Commands