. Configure the ISA server to filter both inbound and outbound SMTP traffic where
possible.
. Use a third-party SMTP anti-virus product to further extend the capabilities of ISA??™s
SMTP filtering capabilities.
. Consider placing Exchange and other messaging servers in a dedicated screened subnet
that is secured by an ISA server.
FIGURE 13.26 Configuring SMTP filter settings.
CHAPTER 14
Securing Web
(HTTP) Traffic
IN THIS CHAPTER:
. Outlining the Inherent Threat in
Web Traffic
. Publishing and Customizing
Web Server Publishing Rules
. Configuring SSL-to-SSL Bridging
for Secured Websites
. Securing Access to SharePoint
2003 Sites with ISA 2006
. Summary
. Best Practices
Although ISA Server 2006 is designed to handle any type
of network traffic, it does particularly well in the filtering
and securing of the Hypertext Transport Protocol (HTTP),
the most common protocol used on the Internet and the
transport mechanism for delivering website information,
pictures, and video across the Internet.
ISA Server 2006??™s Application-layer filtering technologies
enable organizations to properly secure their outwardfacing
web services from external attacks such as Code Red,
Nimbda, and future HTTP-based exploits yet to be written.
Pages:
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621