Book Image

Microsoft Forefront UAG 2010 Administrator's Handbook

Book Image

Microsoft Forefront UAG 2010 Administrator's Handbook

Overview of this book

Microsoft Forefront Unified Access Gateway (UAG) is the latest in a line of Application Publishing (Reverse Proxy) and Remote Access (VPN) Server products. The broad set of features and technologies integrated into UAG makes for a steep learning curve. Understanding all the features and abilities of UAG is a complex task that can be daunting even to experienced networking and security engineers. This book is the first to be dedicated solely to Microsoft Forefront UAG. It guides you step-by-step throughout all the stages of deployment, from design to troubleshooting. Written by the absolute experts who have taken part of the product’s development, official training and support, this book covers all the primary features of UAG in a friendly style and a manner that is easy to follow. It takes you from the initial planning and design stage, through deployment and configuration, up to maintenance and troubleshooting. The book starts by introducing UAG's features and and abilities, and how your organization can benefit from them. It then goes on to guide you through planning and designing the integration of the product into your own unique environment. Further, the book guides you through the process of publishing the various applications, servers and resources - from simple web applications to complex client/server based applications. It also details the various VPN technologies that UAG provides and how to take full advantage of them. The later chapters of the book educate you with common routine “upkeep” tasks like monitoring, backup and troubleshooting of common issues. Finally, the book includes an introduction to ASP, which some of the product's features are based on, and can help the advanced administrator with enhancing and customizing the product.
Table of Contents (21 chapters)
Microsoft Forefront UAG 2010 Administrator's Handbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Adding load balancing into the mix


Now that you have an array, you can configure any third party load balancer to divvy up the load between your members. We have mentioned earlier that load balancing can distribute the incoming requests between users, and can also monitor the servers and redistribute in case a server goes down. It is important to know, though, that with UAG, this is limited, as UAG does not have a way of tracking sessions across servers. If a user has logged on to a UAG server array, the load balancer will assign that user to one of the array members. If the server crashes, the load balancing service will learn of it quickly and assign the next request from that user to another server in the array. However, the unique session that the user had on the original server will be gone, and the 'new' server will have to initiate the authentication all over again. Once the user re-authenticates, he will be redirected to the same URL he tried to reach, so depending on the design...