Features at a glance
OpenSSH is an open source project distributed under a free license. It offers strong authentication based on the Public Key, Kerberos Authentication and One-Time Password standards, strong encryption based on the AES, Blowfish, Arcfour and 3DES algorithms, X11 forwarding supports by encrypting the entire X Window System traffic, as well as AFS and Kerberos ticket passing.
Additionally, the software feature port forwarding support by encrypting channels for legacy protocols, data compression support, agent forwarding support by using the Single-Sign-On (SSO) authentication standard and SFTP (Secure FTP) server and client support in either SSH2 or SSH1 protocols.
Another interesting feature is interoperability, which means that the project complies with versions 1.3, 1.5 and 2.0 of the original SSH (Secure Shell) protocol. After installation, OpenSSH will automatically replace the standard FTP, Telnet, RCP and rlogin programs with secure versions of them, such as SFTP, SCP and SSH.
Under the hood, availability and supported OSes
The OpenSSH project is written entirely in the C programming language. It comprised of the main SSH implementation and the SSH daemon, which runs in the background. The software is distributed mainly as a universal sources archive, which will work with any GNU/Linux operating systems on both 32-bit and 64-bit architectures.
A portable version of the OpenSSH protocol is also available for download on Softpedia, free of charge, called Portable OpenSSH. It is an open source implementation of SSH version 1 and SSH version 2 protocols for Linux, BSD and Solaris operating systems.
Reviewed by Marius Nestor, last updated on October 7th, 2014
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- Potentially-incompatible changes:
- sshd(8): The default set of ciphers and MACs has been altered to remove unsafe algorithms. In particular, CBC ciphers and arcfour* are disabled by default. The full set of algorithms remains available if configured explicitly via the Ciphers and MACs sshd_config options.
- sshd(8): Support for tcpwrappers/libwrap has been removed.
Application descriptionOpenSSH is an open source and free version of the SSH protocol suite of network connectivity tools that protect your c...