In the authentication process, a SSL/TLS client sends a
message to a SSL/TLS server, thus responding with the information that the
server needs to authenticate itself. The client and server perform an additional
exchange of session keys, ending the authentication dialog. When authentication
is completed, secured communication can begin between the server and the
client using the symmetric encryption keys that are established during the
authentication process.
Designing & Planning??¦
OWA Server Placement
Although the main goal in this chapter is to show you how to use the IAG feature
in ISA Server 2006 to secure OWA, it is important to consider the other aspects
Using Outlook Web Access through the Intelligent Application Gateway ??? Chapter 9 341
Your comments should be easily explained by setting up a basic planning explanation.
ISA server should be used when you need:
?– Branch offi ce gateway for site-to-site connectivity and security
?– Data center Internet access control and Web caching
?– Advanced security with inbound and outbound fi rewall
?– Publishing, securing, and pre-authenticating access to specifi c Web services
such as Microsoft Exchange server and Microsoft SharePoint server (when
more advanced client options aren??™t required)
?– Full network connectivity for managed PCs (via Virtual Private Network
[VPN])
?– High-security client access via Windows 2000 or Windows XP that needs
host checking and quarantine and Internet Protocol Security (IPSec) (or
other) encryption and authentication
To augment and enhance the ISA server, it recommended adding the Intelligent
Application Gateway when you need to do the following in the corporate world.
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