Mar 22, 2012

What is SSH?

You can get more info on SSH here:

Secure Shell

"Secure Shell (SSH) is a network protocol for secure data communication, remote shell services or command execution and other secure network services between two networked computers that it connects via a secure channel over an insecure network: a server and a client (running SSH server and SSH client programs, respectively).[1] The protocol specification distinguishes two major versions that are referred to as SSH-1 and SSH-2.

The best-known application of the protocol is for access to shell accounts on Unix-like operating systems. It was designed as a replacement for Telnet and other insecure remote shell protocols such as the Berkeley rsh and rexec protocols, which send information, notably passwords, in plaintext, rendering them susceptible to interception and disclosure using packet analysis.[2] The encryption used by SSH is intended to provide confidentiality and integrity of data over an unsecured network, such as the Internet."

SSH is the noise people make when they want you to be quiet.  You may hear SSH if you are too loud in a library, for example.


SSH is the Secure SHelter Authentication Protocol.  SSH give you good authentication and secure communications over unsecured channels. Basically, it provides a way to log in to another machine over a network, and move files and execute commands. It helps prevent IP spoofing and source routing, as well as protecting against interception of passwords by intermediate hosts.


Wikipedia explains it pretty thoroughly.  http://en.wikipedia.org/wiki/Secure_Shell

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