| Microsoft Internet Security and Acceleration Server 2000 |
Protocol rules define which protocols can be used for communication between the local network and the Internet. Protocol rules are processed at the application level. For example, a protocol rule might allow clients to use the HTTP protocol.
Site and content rules define what content on which Internet sites can be accessed by clients behind the ISA Server computer. Site and content rules are processed at the application level. For example, a site and content rule might allow clients to access any destination on the Internet.
When you install ISA Server, you specify the installation mode: firewall, cache, or integrated. The following table lists which access policy rule types are available for each mode.
| Rule type | Firewall | Cache | Integrated |
|---|---|---|---|
| Site and content rules | Yes | Yes | Yes |
| Protocol rules | Yes | Yes, for HTTP, File Transfer Protocol (FTP), and Secure HTTP (HTTPS) | Yes |