MCSE ISA Server 2000- P3: These books include a large amount and different kinds of information. The many different elements are designed to help you identify information by its purpose and importance to the exam and also to provide you with varied ways to learn the material. | Chapter 1 INTRODUCTION WHAT IS ISA SERVER 33 Bandwidth Rules Bandwidth rules can set priorities for requests according to protocol definitions destination sets schedule client address set content group and required priority. Protocol Rules Protocol rules identify which protocols clients can use to access the Internet. These rules are processed at the application level. Protocol definitions are preconfigured but can also be added. Additional protocols are be made available by installing application filters. Site and Content Rules Site and content rules define which sites and what types of content can be accessed. They are further distinguished by definitions of destination sets schedules and users. Application Filters Application filters extend the firewall client access capabilities and restrictions. They can perform additional tasks such as authentication or virus checking. Third-party application filters can be added. The following application filters extensions are installed with ISA Server File Transfer Protocol FTP access filter. Dynamically opens ports and performs address translation for SecureNAT clients. protocol filter. Uses protocol definitions added when the gatekeeper is installed to allow incoming and outgoing calls audio video and application sharing. HyperText Transfer Protocol HTTP redirector filter. Forwards HTTP requests from SecureNAT and firewall clients to the Web Proxy service. Intrusion detection filters. DNS and POP intrusions detection filters. Remote Procedure Call RPC filter. Enables publishing of RPC servers. 34 Part I INSTALLATION AND UPGRADE SOCKS filter. Forwards requests from SOCKS applications to the firewall service. Simple Mail Transfer Protocol SMTP filter. Accepts and inspects SMTP traffic arriving on port 25. Streaming media filter. Allows client access and server publishing of Microsoft Windows Media MMS Progressive Networks protocol PNM or RealPlayer and Real Time Streaming Protocol RTSP or RealPlayer
