Knocking
Encyclopedia
Knocking may refer to:
Knocking may also call to mind:
- Knocking, Austria, a city, subdivision of ErlaufErlaufErlauf is a town in the district of Melk in the Austrian state of Lower Austria....
in Austria - Knocking (documentary)Knocking (documentary)Knocking is a 2006 documentary film directed by Joel Engardio and Tom Shepard that focuses on the civil liberties fought for by Jehovah's Witnesses...
, a documentary about Jehovah's Witnesses
Knocking may also call to mind:
- Engine knockingEngine knockingKnocking in spark-ignition internal combustion engines occurs when combustion of the air/fuel mixture in the cylinder starts off correctly in response to ignition by the spark plug, but one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.The...
, or the sound accompanying automotive combustion malfunction - Port knockingPort knockingIn computer networking, port knocking is a method of externally opening ports on a firewall by generating a connection attempt on a set of prespecified closed ports. Once a correct sequence of connection attempts is received, the firewall rules are dynamically modified to allow the host which sent...
, a covert method of opening a port on a server