Following table lists important protocols and products related with SSH.
|A common term used for SSH protocols or products.
|The first version of SSH protocol. It was released on July 1995.
|More secure and standard version of SSH protocol. SSH-2 protocol was adopted as a standard in 2006.
|The first implementation of SSH-1 protocol by Tatu Ylonen. SSH1 software was released in 1995. SSH1 is obsolete now.
|The implementation of SSH-2 protocol by SSH Communications Security Inc. The current SSH client/server product by SSH Communications Security Inc., is named as Tectia.
|Client program for SSH protocol is called as ssh (small letters).
|OpenSSH is the free implementation of the SSH-2 protocol by the OpenBSD project (https://www.openbsd.org).
|PuTTY is an SSH and telnet client, developed originally by Simon Tatham for the Windows platform. You can download PuTTY at following link. Download PuTTY .
|Bitvise SSH server and client
|Bitwise SSH server and client are available free for personal and non-commercial use. Download Bitvise SSH server and client at following link. Download Bitvise SSH server and client .
|VanDyke SSH server and client are another commercial products based on SSH-2 protocol. Try VanDyke Software SSH server SecureCRT at following link. Try VanDyke Software SSH server and SecureCRT.