A proxy auto-config (PAC) file defines how web browsers and other user agents can automatically choose the appropriate proxy server (access method) for fetching a given URL.

Nov 9, 2025 · A Proxy Auto-Configuration (PAC) file is a JavaScript function that determines whether web browser requests (HTTP, HTTPS, and FTP) go directly to the destination or are forwarded to a …

Jan 15, 2025 · How to configure proxy server settings through Web Proxy Auto-Discovery Protocol (WPAD) We recommend you use WPAD to configure Windows to use an Internet proxy server. The …

Mar 25, 2024 · Proxy server settings can be automatically deployed to clients using the Web Proxy Auto-Discovery Protocol (WPAD). This protocol utilizes a Proxy Auto Config file (PAC), which can be …

Feb 28, 2025 · When I came across this — I looked for how to use the proxy only for certain addresses and that related google search shows “to use the PAC”. Some useful examples can be found here.

A proxy auto-configuration (PAC) file is a text file that instructs a browser to forward traffic to a proxy server instead of directly to the destination server.

Jul 15, 2010 · Proxy Auto-Configuration (PAC) is a method used by Web browsers to select a proxy for a given URL. The method for choosing a proxy is written as a JavaScript function contained in a PAC …

Windows 11 configures proxy behavior from the Settings app using three common models: automatic discovery (WPAD), a proxy auto-configuration script (PAC), or a fixed manual proxy address and port.

Similar to web browsers, ThousandEyes Enterprise Agents can use a proxy auto-config (PAC) file to select a proxy server based on the requested URL and other variables.

The following procedures explain steps to manually add a proxy auto configuration file to web browsers in Microsoft Windows and MacOS.