Q: Why do I get the following error message when I try to connect?
HTTP 403.4 - Forbidden:
SSL required
Internet Information Services
A: After the Outlook Web Access user receives the error message, the user must manually
type https:// at the start of the URL to connect to the Exchange Server computer.
You may want to confi gure Internet Information Services (IIS) to automatically
redirect the Outlook Web Access user??™s HTTP request to HTTPS, to minimize
user interaction and to make sure that all incoming requests are enabled for SSL.
361
Chapter 10
Confi guring Virtual
Private Network Traffi c
Through the Intelligent
Application Gateway
Solutions in this chapter:
?– Setting up the Network Connection Server
?– Connecting Through the Virtual
Private Network
?› Summary
?› Solutions Fast Track
?› Frequently Asked Questions
362 Chapter 10 ??? Confi guring Virtual Private Network Traffi c
Introduction
As part of the Forefront infrastructure, virtual private network (VPN) traffi c can be
confi gured to pass through the Intelligent Application Gateway (IAG) using a Secure
Sockets Layer (SSL) connection. VPNs allow remote users to securely connect to internal
networks to gain access to resources. Previously, VPN traffi c was encrypted using
Layer 2 tunneling protocol (L2TP) or point-to-point tunneling protocols (PPTP),
resulting in support problems such as problems with application compatibility, setup
complications, and difficulty when being used over networks that use Network
Address Translation (NAT).
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