WPAD
WPAD, the Web Proxy Auto-Discovery Protocol, is a system that allows clients such as web browsers to automatically locate a PAC (Proxy Auto-Config) file and determine how to route their HTTP requests through a proxy. It was defined in RFC 3084 and is used especially in large or managed networks to simplify proxy configuration for many machines.
WPAD relies on two discovery mechanisms: DNS and DHCP. In the DNS method, the client looks up
The typical discovery order is to attempt DNS first, then DHCP, though implementations may vary. The PAC
Security and privacy considerations are important with WPAD. Because WPAD can be affected by rogue DHCP or