Learn more about Port Knocking with a FAQ and an old article from Linux Journal.
"... users make connection attempts to sequences of closed ports. The failed connections are logged by the server-side packet filtering firewall and detected by a dæmon that monitors the firewall log file. When a properly formatted knock sequence, playing the role of the secret used in the authentication, is received, firewall rules are manipulated based on the information content of the sequence."
(Submitted by Noel Fri Feb 27, 2004 )
Our content can be syndicated: Main page Mac Page
Copyright 1999-2005 Noel Davis. Noel also runs web sites about sailing and kayaking.
All trademarks are the property of their owners.
All articles are owned by their author