Automatic Proxy Configuration
- a javascript that tells the browser when to use the proxy server
- contains same list of IP addresses we give to resource providers
- contains the host names of all the IP filtered sites we subscribe
to
- the browser compares its IP address, and the requested URL, against
both of these lists to determine how to route the request
- executed for every request - there is a slight impact on browser responsiveness.
- stored on our web site, without access restrictions
- web browsers must be able to access the APC file before they
are authenticated