Reasons to Migrate from ISA Server 2006 to Forefront TMG 2010

We know there are many customers who are extremely happy with ISA Server 2006 and have been putting off migration to Forefront TMG 2010. As 2010 is coming to an end, we think you should include migration to TMG 2010 as one of your new year resolutions.

This post will focus on showing you why and help you learn more about Forefront TMG 2010.


Value Proposition: Microsoft Secure Web Gateway with Forefront TMG 2010

Forefront Threat Management Gateway allows employees to safely and productively use the Internet without worrying about malware and other threats. It provides multiple layers of continuously updated protections against the latest Web-based threats, including URL filtering, antimalware inspection, and intrusion prevention.


Microsoft Forefront TMG Core Capabilities

Microsoft Forefront TMG 2010 is positioned as a Secure Web Gateway. The core new features of this product are:

  • URL filtering: improves blocking of malicious or inappropriate sites using aggregated data from multiple URL filtering vendors and the anti-phishing and malware technologies that also protect Internet Explorer 8 users.
  • HTTPS Inspection: inspect outbound HTTPS traffic in order to protect your organization from security risks inherent to Secure Sockets Layer (SSL) tunnels, such as viruses and other malicious content that could infiltrate the organization undetected.
  • Intrusion Prevention (NIS): Protects against browser-based and other Microsoft vulnerabilities.
  • Web anti-malware: Provides highly accurate malware detection with the same world-class engine that is used by Microsoft Security Essentials and Microsoft Forefront products.
  • Support for Windows Server 2008 R2 (x64): first Microsoft Edge protection product that leverages the scalability and increased memory space improvements of the Windows 64 bit platform.


ISA Server 200X Capabilities

ISA Server 200x doesn’t offer the same Secure Web Gateway capabilities that Forefront TMG offers. ISA Server 200x is commonly used in a Proxy (forward and reverse) type of scenario. Forefront TMG inherits all the ISA Server 2006 capabilities and adds new features to provide more comprehensive protection, while providing a seamless migration path.

Side by Side Comparison

Use the table below to compare ISA 2006 to TMG 2010 feature wise:


What you can do on TMG that you cannot do on ISA

Back in May 2010 I wrote a post on my personal blog where I covered some common scenarios where customers commonly ask if they can use ISA. I selected the top 5 scenarios where there is a real need in the environment, however such a need cannot be answered by ISA Server. The good news is that it can be definitely be answered with TMG. Check the full article at

Learn more about Forefront TMG 2010

Below are some resources that are available for learning about and trying Forefront TMG 2010:


Yuri Diogenes

Sr Security Support Escalation Engineer

Microsoft CSS Forefront Security Edge Team



Ori Yosefi

Senior Program Manager

Microsoft Forefront Threat Management Gateway Team