How to Configure Proxy PAC Files. Proxy auto-configuration files are JavaScript files that automatically set a browser's proxy settings based on a server administrator's needs.

This is called Online Identity Theft. How to know if your PAC file is compromised The manual method is to open Internet Options -> Connection tab -> LAN settings.

Problem: Works great until the geniuses update the other .pac file with a new address in the list, then everything breaks until I grab the new one. No, they won't tell me when they update it. 2.

For example, a related NPM package called Pac-Proxy-Agent, which is made by the same author and has over 2 million weekly downloads, provides PAC file support to Node.js applications.