URL redirection/forwarding for Automatic Configuration Script PAC file

Products

• ProxySG Software - SGOS

Issue/Introduction

Redirection is not working when attempting to redirect the old PAC file to a new location. 

Redirecting to a new URL location where the old URL is no longer reachable and resolvable by the DNS.

Updating old PAC file with new location.

 

 

Resolution

To configure the proxy to redirect the PAC files from the browser "Automatic Configuration Script", is not possible due to a technical limitation with the browser.

 

On the browser, configuring the "Automatic Configuration Script", and the "Proxy Server" to use production proxies will not achieve this. The "Automatic Configuration Script" will override the "Manual Proxy Settings", and the browser will only use the "Proxy Server" once it fails the automatic configuration script. Once the proxy server is used, the browser will send the client request (e.g.: www.example.com) to the proxy, instead of getting the PAC file for automatic configuration script.

 

URL redirect/forwarding is not suitable in achieving this objective and cannot work based on the above description. To update new "Automatic Configuration Script" settings, it is suggested to  use Microsoft Group Policy Object (GPO) to achieve the desire outcome.