Knocking or Knockin or Knockin' may refer to: * Knocking, Austria, a hamlet, subdivision of

Erlauf (municipality) Erlauf is a municipality in the district of Melk in the Austrian state of Lower Austria Lower Austria (german: Niederösterreich; Austro-Bavarian: ''Niedaöstareich'', ''Niedaestareich'') is one of the nine states of Austria, located in the nor ...

in Austria *

Knocking (2006 film) ''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. It focuses primarily on the stories of three Jehovah's Witnesses, and how their lives demonst ...

, a documentary about Jehovah's Witnesses *

Knocking (2021 film) ''Knocking'' ( sv, Knackningar) is a 2021 Swedish thriller film directed by Frida Kempff and written by Emma Broström, based on a short story by Johan Theorin. The film stars Cecilia Milocco, Krister Kern, Albin Grenholm, Ville Virtanen, and A ...

, a Swedish thriller film * "Knockin'" (song), by Spanish band Double Vision (1995) *

Engine knocking In spark ignition internal combustion engines, knocking (also knock, detonation, spark knock, pinging or pinking) occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front igni ...

, or the sound accompanying automotive combustion malfunction *

Port knocking In 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 a ...

, a covert method of opening a port on a server *

Roof knocking Roof knocking ( he, הקש בגג) or "knocks on the roof" is a term used by the Israel Defense Forces (IDF) to describe its practice of dropping non-explosive or low-yield devices on the roofs of targeted civilian homes in the Palestinian terri ...

, a bombing practice of the Israeli Defense Forces *

Gene knockin In biology, the word gene (from , ; "...Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a ba ...

, genetic engineering method *

Knockin Castle Knockin Castle is situated in the village of Knockin on Shropshire between Oswestry and Shrewsbury (). This was a motte and bailey castle founded by Guy le Strange between 1154 and 1160 and it remained the principal holding of the le Strange fam ...

, castle situated in the village of Knockin on Shropshire between Oswestry and Shrewsbury

See also