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

General

Name Developer First release date Last release Last release date License
Apache MINA SSHD Apache Software Foundation 2009 2.0.0 2018-05-28[1] Apache License v2
CopSSH Itefix 2003-08-12 6.1.2 2018-02-19[2] Proprietary, Free for non-commercial use
CrushFTP Server CrushFTP, LLC 2003-01-01 7.6.0 2016-05-07 Proprietary, shareware
Dropbear Matt Johnston 2003-04-06[3] 2018.76 2018-02-27[4] MIT
lsh Niels Möller 1999-05-23[5] 2.1 2013-06-26 GPL
OpenSSH The OpenBSD project 1999-12-01 7.7 2018-04-03[6] BSD

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
Apache MINA SSHD Yes No Yes No Yes Yes Yes Yes No No No Yes Yes No No No
Copssh No No Yes Yes No No No No No No No No No No No No
CrushFTP Server Yes No Yes Yes Yes Yes Yes Yes No No No Yes Yes No No No
Dropbear Yes No No Yes Yes Yes Yes No No No No Yes Yes No Yes[Note 2] Yes
lsh Yes No No No Partial[Note 3] Yes Yes No No No No No No No No ??
OpenSSH Included No Partial[Note 4] Included Included Included[Note 5] Yes No Yes Yes Yes Yes[Note 6] Included Yes[Note 7] Yes[Note 2] Partial

Features

Name SSH1 SSH2 Port forwarding SFTP SCP Supports IPv6 Supports OpenSSH authorized keys Privilege separation FIPS 140-2 certified
Apache MINA SSHD No Yes Yes Yes Yes Yes Yes No ?
Copssh Yes Yes Yes Yes Yes Yes Yes Yes[7] ?
CrushFTP Server No Yes Yes Yes Yes Yes Yes Yes ?
Dropbear No Yes Yes Partial Yes Yes Yes No ?
Lsh No Yes Yes Yes Yes ? ? ? ?
OpenSSH No[8] Yes Yes Yes Yes Yes Yes Yes[7] Yes[Note 8]

See also

Notes

  1. ↑ Unless otherwise noted, iPhone refers to non-jailbroken devices.
  2. 1 2 OpenSSH and Dropbear are available as optware packages installed by PreWare (maintained by WebOS Internals)
  3. ↑ Lsh supports only one BSD platform officially, FreeBSD.
  4. ↑ Native OpenSSH for Windows is under development and predicted to be production ready some time during 2016. The project is called Win32-OpenSSH (contains 64bit as well), hosted on GitHub.
  5. ↑ Most Linux distributions have OpenSSH as an official package, but a few do not.
  6. ↑ Openssh 3.4 was the first release included since AIX
  7. ↑ Only for jailbroken devices.
  8. ↑ OpenSSH server can be built with FIPS 140-2

References

  1. ↑ http://mina.apache.org/sshd-project/
  2. ↑ "Copssh update - 6.1.2". itefix.net.
  3. ↑ Changes in Dropbear in official web page
  4. ↑ "Index of /dropbear". ucc.asn.au.
  5. ↑ "Listing of /~nisse/archive/". liu.se.
  6. ↑ "OpenSSH for OpenBSD". openssh.com.
  7. 1 2 sshd_config man page on openbsd project 2016-05-18. Retrieved on 2016-05-18.
  8. ↑ OpenSSH 7.5 Release notes, SSHv1 server no longer supported Retrieved on 2017-07-09.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.