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From Wikipedia, the free encyclopedia

OpenConnect
Original author(s)David Woodhouse
Developer(s)Daniel Lenski, Nikos Mavrogiannopoulos
Initial releaseMarch 18, 2009 (2009-03-18)[1]
Stable release
9.12 / May 20, 2023; 9 months ago (2023-05-20)[1]
Repository
TypeVPN
LicenseGNU LGPL v2.1[2]
Websitewww.infradead.org/openconnect/

OpenConnect is a free and open-source cross-platform multi-protocol virtual private network (VPN) client software which implement secure point-to-point connections.

The OpenConnect client supports the following VPN protocols:

It was originally written as an open-source replacement for Cisco's proprietary AnyConnect SSL VPN client,[7] which is supported by several Cisco routers.

As of July 2023, support for several other proprietary VPN protocols is desired or in development:

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Transcription

Architecture

The OpenConnect client is written primarily in C, and it contains much of the infrastructure necessary to add additional VPN protocols operating in a similar flow, and to connect to them via a common user interface:[13]

OpenConnect can be built to use either the GnuTLS or OpenSSL libraries for TLS, DTLS and cryptographic primitives.

Platforms

OpenConnect is available on Solaris, Linux, OpenBSD, FreeBSD, MacOS, and has graphical user interface clients for Windows,[14] GNOME,[15] and KDE.[16] A graphical client for OpenConnect is also available for Android devices,[17] and it has been integrated into router firmware packages such as OpenWrt.[18]

OpenConnect VPN graphical client

The OpenConnect project provide clients for Windows and macOS.[19]

Server

The OpenConnect project also offers an Cisco AnyConnect-compatible server, ocserv,[20] and thus offers a full client-server VPN solution.

OpenConnect and ocserv now implement an extended version of the Cisco AnyConnect VPN protocol, which has been proposed as an Internet Standard.[21] Both OpenConnect and ocserv strive to maintain backwards-compatibility with Cisco AnyConnect servers and clients.

Notable uses

OpenConnect's implementation of the Cisco AnyConnect protocol is sufficiently complete, such that some of Cisco's own IP phone devices embed a very old release of OpenConnect[22] in order to connect to Cisco SSL VPNs.[23][24]

References

  1. ^ a b infradead.org - OpenConnect: Changelog.
  2. ^ gitlab.com - OpenConnect: License.
  3. ^ "OpenConnect 7.05 release". lists.infradead.org. 2015-03-10. Retrieved 2023-07-10.
  4. ^ "OpenConnect 8.00 release". lists.infradead.org. 2019-01-04. Archived from the original on 2020-06-09.
  5. ^ "OpenConnect 8.04 release". lists.infradead.org. 2019-08-09. Retrieved 2023-07-10.
  6. ^ "OpenConnect 8.20 release". lists.infradead.org. 2022-02-20. Retrieved 2023-07-10.
  7. ^ ""Development of OpenConnect was started after a trial of the Cisco client under Linux found it to have many deficiencies …"". Infradead.org. Retrieved 2018-08-13.
  8. ^ "Issues - Draft: SonicWall NetExtender support".
  9. ^ "Merge requests - Draft: CheckPoint SNX support". 5 June 2021.
  10. ^ "Merge requests - Draft: Add H3C TLS VPN protocol". 23 July 2022.
  11. ^ "Issues - Add support for Barracuda CloudGen Firewall".
  12. ^ "Issues - Huawei SSL VPN support".
  13. ^ Daniel Lenski (September 17, 2020). "How VPNs Work- The Ins and Outs". DAMA Portland.
  14. ^ "OpenConnect graphical client". GitLab. Retrieved 2023-01-23.
  15. ^ "NetworkManager-openconnect". gnome.org. Retrieved 2020-01-27.
  16. ^ "NetworkManagement". kde.org. Retrieved 2014-10-28.
  17. ^ "Android UI for OpenConnect VPN client". GitLab. Retrieved 2023-01-23.
  18. ^ "VPN Overview". openwrt.org. Retrieved 2018-03-15.
  19. ^ https://gui.openconnect-vpn.net/
  20. ^ OpenConnect VPN Server.
  21. ^ N. Mavrogiannopoulos (October 2020). The OpenConnect VPN Protocol Version 1.2. IETF. I-D draft-mavrogiannopoulos-openconnect-03.
  22. ^ "ocserv issues #51".
  23. ^ Nikos Mavrogiannopoulos. "Recipe: VoIP network with ocserv".
  24. ^ "Open Source License Notices for the SPA525G" (PDF). Cisco.

External links

This page was last edited on 13 February 2024, at 12:42
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