LITA Regional Institute: Proxy Web Servers and Authentication
San Antonio, TX February 22, 2001

Proxy Web Servers and Authentication > Proxies for Filtering > Fake a proxy server to prevent access to all but authorized sites

3. Use a PAC file

#2 is better, but whenever you add or remove services you have to visit every machine

Create a Proxy Auto-Config file which only allows access to particular sites

  if (shExpMatch(host, "*eb.com") || shExpMatch(host, "*oclc.org")) {
      return "DIRECT";
    }
    
    return "PROXY www.institution.org:8080";