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The OpenSSH server can authenticate users using the standard methods supported by the SSH protocol: with a password; public-key authentication, using per-user keys; host-based authentication, which is a secure version of rlogin 's host trust relationships using public keys; keyboard-interactive, a generic challenge–response mechanism, which ...
These methods are usually implemented by commercial SSH implementations for use in organizations, though OpenSSH does have a working GSSAPI implementation. The connection layer (RFC 4254) defines the concept of channels, channel requests, and global requests, which define the SSH services provided. A single SSH connection can be multiplexed ...
Perhaps the most widely used SCP program is the OpenSSH command line scp program, which is provided in most SSH implementations. The scp program is the secure analog of the rcp command. The scp program must be part of all SSH servers that want to provide SCP service, as scp functions as SCP server too.
A normal SSH client process cannot be used to store the unencrypted key because SSH client processes only last the duration of a remote login session. Therefore, users run a program called ssh-agent that runs beyond the duration of a local login session, stores unencrypted keys in memory, and communicates with SSH clients using a Unix domain ...
SFTP implementations may include an SSH protocol implementation to leverage integration of SSH connection details with preexisting FTP server access controls, where an alternative SSH server is tolerable or where alternative ports may be used. An SSH-2 server which supports subsystems may be leveraged to keep a uniform SSH implementation while ...
An SSH server is a software program which uses the Secure Shell protocol to accept connections from remote computers. SFTP / SCP file transfers and remote terminal connections are popular use cases for an SSH server.
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Based on the original SSH suite and developed further by the OpenBSD team, 2.6 saw the first release of OpenSSH, which is now available standard on most Unix-like operating systems and is the most widely used SSH suite. [142] 2.7 15 June 2000 Support for SSH2 added to OpenSSH. [143]