fwknop(8) on Linux
The text 306e90fdbbce, as Debian 7 (Wheezy) shipped it.
Firewall Knock Operator
Flags it lists
-
--Version -
--allow-ip -
--digest-type -
--get-key -
--gpg-agent -
--gpg-encryption -
--gpg-home-dir -
--help -
--http-proxy -
--last-cmd -
--nat-access -
--nat-local -
--nat-rand-port -
--rand-port -
--resolve-ip-http -
--save-packet -
--server-port -
--server-proto -
--show-last -
--source-ip -
--spoof-src -
--spoof-user -
--test -
--time-offset-minus -
--time-offset-plus -
--user-agent -
--verbose -
-B -
-G -
-H -
-N -
-P -
-Q -
-R -
-T -
-U -
-V -
-a -
-g -
-h -
-l -
-m -
-p -
-r -
-s -
-u -
-v