Chapter 27 - Advanced Server Publishing with ISA Server

Abstract

This chapter reveals that server publishing rules allows publishing almost any protocol. This is the primary advantage of server publishing over web publishing. The server publishing rule essentially performs a reverse network address translation (NAT) function. The ISA server does not replace the source Internet protocol (IP) address on the packet unless one implements the changes noted in Microsoft KB article Q311777. An important consideration when implementing server publishing rules is to avoid port contention on the external interface. No two services can listen on the same port on the same IP address on the external interface of the ISA server. Web publishing rules allow publishing web and FTP sites. Web publishing rules are handled by the web proxy service. The web proxy service is able to examine the application-layer data and make decisions on how to handle requests based on information such as the destination URL.