![tunnelblick server configuration tunnelblick server configuration](https://cs.hofstra.edu/docs/images/tunnelblick_login_prompt.png)
If any "user” or "group” options appear in the configuration file, DNS settings will not be restored when a tunnel is disconnected.Any "up” or "down” options in the configuration file will be ignored.
![tunnelblick server configuration tunnelblick server configuration](https://tunnelblick.net/images/cConnectedBut-ipinfo-2019-03-18.png)
If Tunnelblick's "Set nameserver” option is used:
![tunnelblick server configuration tunnelblick server configuration](https://tunnelblick.net/images/using-tunnelblick-appearance-panel-2016-03-04.png)
(See "useShadowConfigurationFiles" in the "Preferences" section.) The user should never manipulate this folder or its contents directly Tunnelblick will do so automatically. This is done transparently for configuration files located on network volumes. The configuration file may also be "shadow" copied to the /Library/Application Support Tunnelblick/Users/ username folder. To disable this behavior, use "doNotMonitorConfigurationFolder". If a configuration is removed from the folder, any connection using that configuration is immediately disconnected. If a configuration file is added, the new configuration is available immediately without restarting Tunnelblick or disturbing existing connections. Tunnelblick monitors the folder that contains the configuration files. See the Deploying Tunnelblick wiki for details. When using a "deployed" version of Tunnelblick, configuration files are all located within the Tunnelblick application itself, so ~/Library/openvpn is not used. (Note that some OpenVPN options are available only on Windows.) Refer to the OpenVPN documentation for details about what the configuration file should contain. (The "~" refers to your home folder.) Often these configuration files will be supplied to you. ovpn to be a configuration file, and presents each such file as a potential "connection”. Tunnelblick considers any file located in ~/Library/openvpn with an extension of. Each tunnel to be opened by Tunnelblick needs an OpenVPN configuration file.