Comparison of SSH servers Informatics & Computer 482 regular-tuition-program.pts-ptn.net

Comparison of SSH servers

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 a SSH server. This article compares a selection of popular servers.

1 General
2 Platform
3 Features
4 See also
5 Notes
6 References

General

Name	Developer	Status	First release date	Last release	Last release date	License	Official web page
Reflection for Secure IT	Attachmate	Active	2005	8.0	2012-11-14	Commercial	Attachmate.com
Bitvise SSH Server (formerly WinSSHD)	Bitvise, Ltd.	Active	2001-05	5.60	2013-03-21^[1]	Freeware for non commercial use	Bitvise SSH Server
CopSSH	Itefix	Active	2003-08-12	4.4.2	2013-02-13	Commercial, Free edition	CopSSH
Dropbear	Matt Johnston	Active	2003-04-06^[2]	2012.55	2012-02-24^[3]	MIT	Dropbear
freeSSHd SSH Server	WEONLYDO Software			1.2.6	2009	Freeware (source available for purchase)	freeSSHd
GoAnywhere Services	Linoma Software	Active	2009-09-01	3.1.1	2012-12-27	Commercial	GoAnywhere Services
lsh	Niels Möller	Active	1999-05-23^[4]	2.9-exp	2007-04-04	GPL	LSH
MobaSSH SSH Server	Mobatek	Active		1.22		Freeware for non commercial use	MobaSSH SSH Server
OpenSSH	The OpenBSD project	Active	1999-12-01	6.2	2013-03-22^[5]	BSD	OpenSSH
Pragma Fortress SSH Server	Pragma Systems, Inc.	Active	2004-05-24	5.0	2011-04-20^[6]	Commercial	SSH SFTP Server for Windows
Tectia SSH Server	SSH Communications Security (formerly Tectia)	Active	1995-07	6.2.3	2011-12-15	Commercial	SSH.com
PowerShell Server	/n software	Active		5.0.0.4482^[7]	2012-04-15-09	Commercial	PowerShellInside
SilverSHielD	Extenua, Inc. (under the K2SXS brand)	Active	2008-10	5.3.24.164	2013-03-14^[8]	Free for non commercial use	SilverSHielD

Platform

The operating systems or virtual machines the SSH servers are designed to run on without emulation; there are several possibilities:

No indicates that it does not exist or was never released.
Partial indicates that while it works, the server lacks important functionality compared to versions for other OSs but may still be under development.
Beta indicates that while a version is fully functional and has been released, it is still in development (e.g. for stability).
Yes indicates that it has been officially released in a fully functional, stable version.
Dropped indicates that while the server works, new versions are no longer being released for the indicated OS; the number in parentheses is the last known stable version which was officially released for that OS.
Included indicates that the server comes pre-packaged with or has been integrated into the operating system.

The list is not exhaustive, but rather reflects the most common platforms today.

Name	Mac OS X	Mac OS classic	Windows	Cygwin	BSD	Linux	Solaris	Java	OpenVMS	z/OS	AmigaOS	AIX	HPUX	iOS: iPhone,^{[Note 1]} iPod Touch	webOS	Android
Reflection for Secure IT	No	No	Yes	No	No	Yes	Yes	No	No	No	No	Yes	Yes	No	No	No
Bitvise SSH Server	No	No	Yes	No	No	No	No	No	No	No	No	No	No	No	No	No
CopSSH	No	No	No	Yes	No	No	No	No	No	No	No	No	No	No	No	No
Dropbear	Yes	No	No	Yes	Yes	Yes	Yes	No	No	No	No	No	No	No	Yes^{[Note 2]}	Yes
freeSSHd	No	No	Yes	No	No	No	No	No	No	No	No	No	No	No	No	No
GoAnywhere Services	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes	No	No	??
lsh	Yes	No	No	No	Partial^{[Note 3]}	Yes	Yes	No	No	No	No	No	No	No	No	??
MobaSSH SSH Server	No	No	No	Yes	No	No	No	No	No	No	No	No	No	No	No	No
OpenSSH	Included	No	No	Included	Included	Included ^{[Note 4]}	Yes	No	Yes	Yes	Yes	Yes^{[Note 5]}	Included	Yes^{[Note 6]}	Yes^{[Note 2]}	Partial
Pragma Fortress SSH Server	No	No	Yes	No	No	No	No	No	No	No	No	No	No	No	No	??
Tectia SSH Server	No	No	Yes	No	No	Yes	Yes	No	No	Yes	No	Yes	Yes	No	No	??
SilverSHielD	No	No	Yes	No	No	No	No	No	No	No	No	No	No	No	No	No

Features

Name	SSH1	SSH2	Port forwarding	SFTP	SCP	Supports IPv6	Supports OpenSSH authorized keys	Privilege separation
Reflection for Secure IT	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Bitvise SSH Server	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes
CopSSH	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes^[9]
Dropbear	No	Yes	Yes	No	Yes	Yes	Yes	No
GoAnywhere Services	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Lsh	No	Yes	Yes	Yes	Yes	?	?	?
MobaSSH SSH Server	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
OpenSSH	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes^[10]
Pragma Fortress SSH Server	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Tectia SSH Server	No	Yes	Yes	Yes	Yes	No^{[Note 7]}	Yes	Partial^{[Note 8]}
SilverSHielD	No	Yes	Yes	Yes	No	No	Yes	Yes

Notes

^ Unless otherwise noted, iPhone refers to non-jailbroken devices.
^ ^a ^b OpenSSH and Dropbear are available as optware packages installed by PreWare (maintained by WebOS Internals)
^ Lsh supports only one BSD platform officially, FreeBSD.^{[citation needed]}
^ Most Linux distributions have OpenSSH as an official package, but a few do not.
^ Openssh 3.4 was the first release included since AIX
^ Only for jailbroken devices.
^ Scheduled to arrive in 2012 for all supported platforms (z/OS, Windows, Linux, Unix)
^ Different exploit protection mechanism in use

References

^ Bitvise SSH Server Version History
^ Changes in Dropbear in official web page
^ [1]
^ Archive of lsh releases in official web page
^ OpenBSD changes in official web page
^ [2]
^ [3]
^ SilverSHielD Release Notes
^ sshd_config(5) manual page 2008-04-05. Retrieved on 2008-04-27.
^ sshd_config(5) manual page 2008-04-05. Retrieved on 2008-04-27.