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(Redirected from ClarkConnect)
OS familyLinux (Unix-like)
Working stateCurrent
Source modelOpen source[1]
Initial release2001; 23 years ago (2001)[2]
Latest release7.8[3] / 23 June 2020; 3 years ago (23 June 2020)
Kernel typeMonolithic kernel (Linux)
user interface
Web user interface
LicenseGPL, and others

ClearOS (also known as the ClearOS System, formerly ClarkConnect[4]) is a Linux distribution by ClearFoundation, with network gateway, file, print, mail, and messaging services.


ClearOS is based on CentOS and Red Hat Enterprise Linux,[5] designed for use in small and medium enterprises as a network gateway and network server with a web-based administration interface.[6] It is positioned as an alternative to Windows Small Business Server.[7] ClearOS is the successor to ClarkConnect. The software is built by ClearFoundation, and support services can be purchased from ClearCenter.[8] ClearOS 5.1 removes previous limitations to mail, DMZ, and MultiWAN functions.[9]

As of the ClearOS 6.1 release, the distribution is a full-featured operating system for gateway, network and servers built from source packages for Red Hat Enterprise Linux.[10][11][12]

ClearOS aims to replace, as a small business server, Windows SBS.[13]


Features include:[13]

Awards and recognition[edit]

  • August 2009: CompTIA Breakaway — ClearCenter's ClearOS wins 'Best New Product' at CompTIA Breakaway.[14]
  • August 2010: CompTIA Breakaway — ClearCenter's ClearOS repeats win for 'Best New Product' at CompTIA Breakaway.[15]
  • July 2012: Softpedia — An Open Source, free and powerful network and gateway Linux server operating system[16]
  • February 2014: IDG Security Firewall Distributions Review[17]
  • June 2015: Small Business Computing — The 5 Best Linux Servers for Small Business[18]
  • September 2015: LinuxVoice Service Distro — Group Test (see pages 58-63)[19]

See also[edit]


  1. ^ "ClearFoundation SVN". Archived from the original on 2020-10-07. Retrieved 2010-10-03.
  2. ^ recycle a tired old computer into an Internet gateway
  3. ^ Tyler Randolph. "ClearOS Server 7.8 Community Edition Released".
  4. ^ A Linux server OS that's fiddly but tweakable • The Register
  5. ^ "DistroWatch: ClearOS".
  6. ^ "ClarkConnect Is Now ClearOS".
  7. ^ "Linux answer to Windows SBS: ClearOS". Archived from the original on 2009-12-07. Retrieved 2009-12-20.
  8. ^ "Overview". ClearCenter. Archived from the original on 2009-08-08. Retrieved 2012-05-24.
  9. ^ "Dual WAN Clarkconnect Community". Archived from the original on 2011-07-08. Retrieved 2010-10-03.
  10. ^ "DistroWatch: Development Release - ClearOS 6.1 Alpha 1".
  11. ^ "ClearFoundation: ClearOS Core 6.1 Alpha1". 6 June 2011.
  12. ^ Linux Small Business Server Distros » Linux Magazine
  13. ^ a b The Small Business Server Replacement is Clear(OS) | Linux Magazine[usurped]
  14. ^ "Breakaway 2009 Best New Product Winner - ClearCenter".
  15. ^ "Best of Breakaway 2010 Awards".
  16. ^ "An Open Source, free and powerful network and gateway Linux server operating system". 5 May 2019.
  17. ^ Mills, Ashton. "Security firewall distributions". IDG (CSO Online). Archived from the original on 2014-08-03. Retrieved 2016-06-29.
  18. ^ Schroder, Carla (June 22, 2015). "The 5 Best Linux Servers for Small Business".
  19. ^ "Server Distros Group Test" (PDF). LinuxVoice Magazine. LinuxVoice. Archived from the original (PDF) on 2016-08-22.

External links[edit]