If you're looking for the official release of Secure Shell, it is listed below. Remember that non-commercial users (Universities, non-profit, and personal use) is free of charge. Otherwise, SSH Secure Shell must be properly licensed.
All official releases are signed, and now you can use DSS/DSA signatures
to check for those of us who have to deal with the RSA patents *grumble*
The central site for distributing ssh is at SSH Communication Security. The application is available at ftp://ftp.ssh.com/pub/ssh/. If you wish to license SSH Secure Shell for either commercial or university distribution (remember, no cost to universities or non-profit organizations), please go to http://commerce.ssh.com
Information on how to check signatures is available at ftp.ssh.com/pub/ssh/HOWTO-CHECK-SIGNATURES.
Official releases of SSH1 are PGP-signed (RSA only), with the following key ID:
|Type||Bits||Key ID||Date||User ID|
|RSA||1024||DCB9AE01||1995/04/24||Ssh distribution key <firstname.lastname@example.org>|
|Key fingerprint = C8 90 C8 5A 08 F0 F5 FD 61 AF E6 FF CF D4 29 D9|
Official releases of SSH2 are PGP-signed (both RSA and DSA), with the following key IDs *:
|Type||Bits||Key ID||Date||User ID|
|RSA||2048||AFCA7459||1998/07/11||Ssh 2 Distribution Key <email@example.com>|
|Key fingerprint = 2A 06 2C 83 F0 A6 72 52 3A 4D 4A FA 20 15 EE 74|
|DSA||1024||83FB127C||2000/06/13||Ssh 2 Distribution Key <firstname.lastname@example.org>|
|Key fingerprint = A348 205D F1D8 2297 0A46 D961 ED7B 28CD 83FB 127C|
Secure Shell is also available via anonymous ftp from the sites listed at http://www.ssh.com/ssh/download.html. Because they are updated regularly, it is too difficult to keep them up to date here.
Here is a list of other implementations Secure Shell clients and servers. The official distribution from SSH Communications Security is not included with these downloads. Please note that they should interoperate with each other; however, this is developer-dependent.
Please note that these distributions may or may not be actively maintained. The owners may not notify people if they are still maintaining the software, and it may or may not work. This information is up here for your information, and if you legally can run the software--to play with it.
If you're looking for a really complete list of Secure Shell clients, take a look
at Rick Moen's list at http://linuxmafia.com/pub/linux/security/ssh-clients.
Niels M÷ller is developing a GPL'd C implementation of the ssh version 2 protocol. Pick up the latest release (which is currently at 0.9.13) at http://www.net.lut.ac.uk/psst/download.html.
The folks from OpenBSD has also created a free Secure Shell implementation of SSH1 and SSH2. You can find it at http://www.openssh.com/. The ports are available for Linux, Solaris, FreedBSD, and many others.
OpenSSH is part of the base OS for OpenBSD, just as rsh, telnet, ksh, etc are installed. If you download the ftp://ftp.openbsd.org/pub/OpenBSD/2.6/i386/base26.tar.gz you will find that ./usr/bin/ssh is one of the files included. In other words, it is part of the base tarball that everybody on every install gets.
At the end of the install, one has the option of installing the usa based RSA implementation, the international RSA implementation, or no RSA implementation; in this last case, only protocol v2 will be used. (if installed, RSA gets retrieved via ftp to avoid patent problems).
You can also get Bjoern Groenvall's ossh (an older freeware port of SSH1) at ftp://ftp.pdc.kth.se/pub/krypto/ossh/.
There are a couple of different Java implementations of Secure Shell.
NiftyTelnet 1.1 Secure Shell is Jonas Wallden's implementation of SSH1 for Macintosh. It is available at http://www.lysator.liu.se/~jonasw/freeware.html.
MacSSH is an SSH2 implementation for Mac clients. You can find it at http://www.macssh.com.
There is David Jones' OpenVMS SSH1 server available at http://www.er6.eng.ohio-state.edu/~jonesd/ssh/.
The OpenVMS SSH1 client is done by Christer Weinigel and Richard Levitte and is available at http://www.free.lp.se/fish/.
The ISAAC group released a version of the SSH1 client for the Palm Pilot, Top Gun ssh 1.2. It's available at http://www.isaac.cs.berkeley.edu/pilot/.
Mov Software has released a port of SSH1 to WindowsCE called sshCE. You can register for beta testing at
http://www.movsoftware.com/sshce.htm. Please note that this has been in "late beta testing" for over a year
now, so we're not sure if this is actively being worked on.
The current BeOS R4 port of SSH1 for Intel and PowerPC platforms is available through Bebits at
http://www.bebits.com/app/703. Also, check out the sshLogin client at http://www.bebits.com/app/746.
The most current port of the SSH1 client to OS/2 is available at
which runs on OS/2 Warp 3+. There is also another Secure Shell program available at
however, we have no idea what it is.
There's now a port of SSH1 to DOS (yes, Disk Operating System) available at http://www.vein.hu/~nagyd.
There are three current commercial releases of Secure Shell. They are distributed by SSH Communication Security, F-Secure (formally Datafellows), and Van Dyke Software.
SSH Secure Shell is available from http://www.ssh.com/ssh. The product includes clients for Windows (which integrates secure file transfer in a GUI) and UNIX (which includes a server that allows two simultaneous connetions), and server available for UNIX as well. Please contact SSH Communications Security directly for more information.
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