Comparison of SSH servers

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Comparison of SSH servers

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SSH servers is a software program which uses the secure shell protocol to accept connections from remote computers. This article compares a selection of popular servers.



[edit] General

Name  ↓ Developer  ↓ Status  ↓ Date of first release  ↓ Last release  ↓ Date of last release  ↓ License  ↓ Official web page  ↓
CopSSH Itefix Active 2009-01-16 3.0.1 2009-10-12 BSD CopSSH
Dropbear Matt Johnston Active 2003-04-06 [1] 0.52 2008-11-12 MIT Dropbear
F-Secure SSH Server F-Secure  ? 2004? commercial
freeSSHD Kresimir Petri  ? 1.2.6 2009-??-??  ? [1]
KpyM KpyM Active 1.18 2009-08-01 [2] BSD [2]
lsh Niels Möller Active 1999-05-23 [3] 2.9-exp 2007-04-04 GPL LSH
OpenSSH The OpenBSD project Active 1999-12-01 5.3 2009-10-01[4] BSD OpenSSH
Reflection for Secure IT Attachmate Active 7.1 commercial [3]
Tectia SSH Communications Security Active 1995 6.1 commercial SSH Communications Security
VShell server VanDyke Software, Inc. Active 1995 3.6 2009-12-10 commercial VanDyke VShell

[edit] 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  ↓ Palm OS  ↓ Java  ↓ OpenVMS  ↓ Windows Mobile  ↓ IBM z/OS  ↓ AmigaOS  ↓ AIX  ↓ HPUX  ↓ iPhone / iPod Touch  ↓ WebOS  ↓
CopSSH No No Yes Yes No 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 No No Yes
lsh Yes No No No Partial Yes Yes No No No No No No No No No No
OpenSSH included No Yes included included included Yes No No Yes No Yes Yes Yes Yes Yes Yes
KpyM No No Yes No No No No No No No No No No No No No No
freesshd No No Yes No No No No No No No No No No No No No No
  • ^  lsh supports only one BSD platform officially, FreeBSD.[citation needed]
  • ^  The majority of Linux distributions have OpenSSH as an official package, but a few do not.
  • ^  Openssh 3.4 was the first release included since AIX[citation needed]
  • ^  Unless otherwise noted, iPhone refers to non-jailbroken devices.
  • ^  [4]
  • ^  Only for jailbroken devices.
  • ^  OpenSSH and Dropbear are available as optware packages installed by PreWare (maintained by

[edit] Features

Name  ↓ SSH1  ↓ SSH2  ↓ Port forwarding  ↓ SFTP  ↓ SCP  ↓ Compatible with OpenSSH authorized keys  ↓ Privilege separation  ↓
CopSSH Yes Yes Yes Yes Yes Yes Yes[5]
Dropbear (software) No Yes Yes No No[6] Yes  ??
Lsh No Yes Yes Yes Yes  ??  ??
OpenSSH Yes Yes Yes Yes Yes Yes Yes[7]

[edit] See also

[edit] References


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This page contains a single entry by 谷多 published on December 19, 2009 5:17 PM.

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