![]() There are two types of configuration files: Key and certificate files usually have an extension of. Key and certificate files associated with a Tunnelblick VPN Configuration (.tblk) are stored inside the configuration itself. These may be stored anywhere, but typically they are stored in the same folder as the configuration (.ovpn or. The contents of the files are merged in the display in Tunnelblick's "VPN Details" window. There are two log files for each configuration, an OpenVPN log file and a scripts log file. ![]() The log files for a configuration are created or deleted and recreated each time the connection is made. (Early versions of Tunnelblick stored them in /tmp/tunnelblick). Log files are stored in /Library/Application Support/Tunnelblick/Logs. The OpenVPN program, openvpn-down-root.so, the Tun and Tap system extension files, and standard client up/down scripts are included with, and contained within, Tunnelblick.app. Running Tunnelblick from from anywhere except /Applications on the startup volume will result in an offer to install Tunnelblick in /Applications on the startup volume. unless they are being used as the startup volume. Thus it cannot be used from network drives or internal or external drives including thumb or flash drives, CD/DVD drives, etc. Tunnelblick is free software licensed under the GNU General Public License (GPL) Version 2.The Tunnelblick application, Tunnelblick.app, must be stored directly in /Applications on the startup volume for security reasons. No additional installation is necessary - just add your configuration and encryption information. ![]() It comes as a ready-to-use application with all necessary binaries and drivers (including OpenVPN and tun/tap). It runs on all versions of macOS and on OS X 10.4 and higher. It provides easy-to-use control of OpenVPN server and/or client connections. Explanation 2: Tunnelblick is a ready-to-use Graphic User Interface (GUI) for OpenVPN on macOS.Your company may provide one, or you can obtain VPN service from any of several VPN service providers, or you can use another one of your computers or a router to act as a VPN server. In addition to Tunnelblick, you need access to a VPN server. VPNs are primarily used for three purposes (sometimes all three simultaneously): - To securely connect a computer to the Internet, even though it may be connecting through an untrusted network (a wireless network at a hotel or airport, for example) - To securely connect a computer to the Internet as if it were located somewhere else (connect a computer in the USA as if it were located in the UK so that BBC content may be accessed, for example) and - To securely connect a computer to a company's internal network or some part of it (a branch office, for example). Normally, all traffic between your computer and the VPN server is encrypted. It is as if you were connecting to the network or Internet through the VPN server instead of your computer. When you connect through a VPN, your computer sends some or all network traffic through a "tunnel" to the VPN server, which then passes on your network traffic to a local network or the Internet. It does this by creating a "Virtual Private Network", or " VPN" to the OpenVPN server using a program named "OpenVPN", which is included within the Tunnelblick application. The server then connects the Mac to a remote network or to the Internet, bypassing untrusted networks, censorship, and eavesdropping. Explanation 1: Tunnelblick is a program that can be used to securely connect a Mac to an OpenVPN server.
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