OpenSSH is a freely available version of the Secure Shell (SSH) protocol tool family to remotely control a computer or transfer files between computers. Traditional tools used to achieve functions, such as telnet or rcp, feel unsafe and send user passwords in clear text when in use.. OpenSSH provides server daemons and client tools to facilitate secure, encrypted remote control and file transfer operations, effectively replacing legacy tools. SSH is a protocol that can be used for various applications. Some of the applications below may require features that are only available or compatible with specific SSH clients or servers. For example, using the SSH protocol to implement a VPN is possible, but now it can only be with OpenSSH server and client implementation.
The client and server both contribute toward establishing this key, and the resulting secret is never known to outside parties. The secret key is created through a process known as a key exchange algorithm. SSH can be configured to utilize a variety of different symmetrical cipher systems, including AES, Blowfish, 3DES, CAST128, and Arcfour. The server and client can both decide on a list of their supported ciphers, ordered by preference. The first option from the client's list that is available on the server is used as the cipher algorithm
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Understanding and Benefits SSH Secure Shell or SSH - SSH is a network protocol that enables data exchange over secure channels between two network devices. Widely used on Linux and Unix-based Operating Systems to access shell accounts, SSH is designed as a replacement for Telnet and other insecure remote shells, which send information, especially passwords, in the form of simple text that makes it easy to intercept. Encryption used by SSH provides confidentiality and data integrity over unsafe networks such as the Internet.