11 Facts About OpenSSH

OpenSSH is a suite of secure networking utilities based on the Secure Shell protocol, which provides a secure channel over an unsecured network in a client–server architecture.

OpenSSH started as a fork of the free SSH program developed by Tatu Ylonen; later versions of Ylonen's SSH were proprietary software offered by SSH Communications Security.

OpenSSH was first released in 1999 and is currently developed as part of the OpenBSD operating system.

OpenSSH is not a single computer program, but rather a suite of programs that serve as alternatives to unencrypted protocols like Telnet and FTP.

OpenSSH is integrated into several operating systems, namely Microsoft Windows, macOS and most Linux operating systems, while the portable version is available as a package in other systems.

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OpenSSH was created as a fork of Bjorn Gronvall's OSSH that itself was a fork of Tatu Ylonen's original free SSH 1.

On 19 October 2015, Microsoft announced that OpenSSH will be natively supported on Microsoft Windows and accessible through PowerShell, releasing an early implementation and making the code publicly available.

OpenSSH-based client and server programs have been included in Windows 10 since version 1803.

OpenSSH is developed as part of the OpenBSD operating system.

On OpenBSD, OpenSSH uses a dedicated user by default to drop privileges and perform privilege separation in accordance with the principle of least privilege, applied throughout the operating system including the Xenocara X server.

OpenSSH proposed that OpenSSH change its name in order to avoid a lawsuit, a suggestion that developers resisted.