How To Create A Pac File

Umbrella's secure web gateway requires that you deploy a proxy auto-config (PAC) file URL to the browser you will be using to reach destinations. If you're behind a firewall, you may also need to deploy Umbrella's PAC file to configure the browser so that it points to the correct proxy server.

Umbrella copies internal domains configured in the Umbrella dashboard (Deployments > Configuration > Domain Management) to the PAC file so that these internal domains are not sent to the proxy.

Note: PAC file downloads and usage are limited to fixed networks registered in Umbrella. PAC files are not supported for roaming computers or other connection mechanisms.

What's a PAC file?

A proxy auto-config (PAC) file is used to tell a browser which proxy server it must use to fetch a URL.

Chrome
Firefox
Edge and Internet Explorer.

We have attempted to provide you with the latest information about how to configure a browser to use Umbrella's PAC file. However, as browser functionality can change at any time, we cannot guarantee that these third-party procedures will remain accurate. For more information on deploying a PAC file URL to your browser, see your browser's Help.

Note: A PAC file is only used with the Umbrella secure web gateway and is only available for the Web policy.

Copy and past Umbrella's PAC file URL into Chrome.

Navigate to Policies > Management > Web Policy and click Add or expand an existing ruleset.
Under Ruleset Settings, for PAC File, copy the PAC file URL.

In your Chrome browser, navigate to Settings > Advanced > System and click Open proxy settings.

Click LAN Settings.

Check Use automatic configuration script and in the Address field paste the PAC file URL copied from Umbrella in Step 2.

Click OK.

Copy and past Umbrella's PAC file URL into Firefox.

Navigate to Policies > Management > Web Policy and click Add or expand an existing ruleset.
Under Ruleset Settings, for PAC File, copy the PAC file URL.

Open your Firefox browser, navigate to Tools > Options, scroll to Network Settings, and click Settings.

Check Automatic proxy configuration URL and paste the PAC file URL copied from Umbrella in Step 2.

Click OK.

Copy and past Umbrella's PAC file URL into Edge or Internet Explorer.

Navigate to Policies > Management > Web Policy and click Add or expand an existing ruleset.
Under Ruleset Settings, for PAC File, copy the PAC file URL.

Open your Edge or Internet Explorer browser, navigate to Settings > Advanced, scroll to Proxying setting setup, and click Open proxy settings.