knockd(1) on Linux
The text 7689d33b186d, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
port-knock server
Flags it lists
-
--config -
--daemon -
--debug -
--help -
--interface -
--lookup -
--verbose -
--version -
-D -
-V -
-c -
-d -
-h -
-i -
-l -
-v