Tunnelblick

Tunnelblick is a free and open-source OpenVPN graphic user interface for macOS.^[2] It allows users to manage and configure the VPN connections used by installed OpenVPN clients and remove servers.

Tunnelblick
Developer	The Tunnelblick Project
Written in	Objective-C
Working state	Current
Source model	Open-source
Initial release	March 2010; 15 years ago (2010-03)
Latest release	4.0.1 / March 12, 2024; 16 months ago (2024-03-12)[1]
Repository	github.com/Tunnelblick/Tunnelblick
Supported platforms	macOS
License	GNU GPLv2
Official website	tunnelblick.net

History

The first stable release was version 3.0 in March 2010.^[3]

Issues

In January 2016, the Sparkle Updater component used by Tunnelblick was found to be vulnerable to a man-in-the-middle attack. This security flaw has since been patched.^[4]

Any VPN or third party tool like Tunnelblick can cause connectivity problems while syncing with iCloud.^[5]