Search results
Results From The WOW.Com Content Network
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 are dynamically modified to allow the host which sent the connection attempts to connect over specific port(s).
The firewalls also note the endpoints in order to allow responses from the server to pass back through. The server then sends each client's endpoint and session information to the other client, or peer. Each client tries to connect to its peer through the specified IP address and port that the peer's firewall has opened for the server.
A port knock setup needs a firewall that logs every port access, a daemon which has means to change the firewall rules (!), and, depending on how complex the knock sequences should be, cryptographic hash generators, handling of multiple knock attempts coming in at the same time, etc.
In computer networking, a port or port number is a number assigned to uniquely identify a connection endpoint and to direct data to a specific service. At the software level, within an operating system , a port is a logical construct that identifies a specific process or a type of network service .
Engine knocking, or the sound accompanying automotive combustion malfunction; Port knocking, a covert method of opening a port on a server; Roof knocking, a bombing practice of the Israeli Defense Forces; Gene knockin, genetic engineering method; Knockin Castle, castle situated in the village of Knockin on Shropshire between Oswestry and Shrewsbury
These funny knock knock jokes are perfect for kids, teens, adults and anyone else looking for a laugh. Find hilarious knee-slappers for the whole family. 150 knock-knock jokes that are a real hoot
1 Main Circuit (1MC) is the term for the shipboard public address circuits on United States Navy and United States Coast Guard vessels.This provides a means of transmitting general information and orders to all internal ship spaces and topside areas, and is loud enough that all embarked personnel are (normally) able to hear it.
In a recent interview, the astronaut said that the sound was like "someone knocking the body of the spaceship just as knocking an iron bucket with a wooden hammer." See fascinating photos of ...