We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is a Threat Management Gateway?

By S.A. Keel
Updated May 16, 2024
Our promise to you
EasyTechJunkie is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At EasyTechJunkie, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A threat management gateway (TMG) is the unified threat management (UTM) software system created by Microsoft® Corporation® as part of its Forefront® security software suite. This component is often referred to as Forefront® TMG. The TMG software is what's known as an edge server, in that it sits at the border of a computer network, auditing network traffic that is entering or leaving. It provides an array of security services including firewall, email filtering, virus monitoring, and more.

The first of this type of offering from Microsoft® was a proxy server back in the late 1990s. This initial offering was a basic Internet access server for a local area network (LAN), but later versions included a packet-filtering firewall. As the product continued to develop, it was renamed in 2001 to Microsoft® Internet Security and Acceleration Server (ISA) and given the ability to link together with others of its kind to provide accelerated services. Further developments led to the product being renamed the Forefront® Threat Management Gateway in 2008.

As a gateway device, the Forefront® TMG holds to its origins as a general Internet access server for a Microsoft® Windows® LAN. This gives the core TMG software the ability to perform routing and network address translation (NAT), which aids with directing traffic inside the network. Working as a bridge to other secure networks, the Forefront® software can also be used to establish a virtual private network (VPN) for connecting with other, remote gateways.

With regards to security, the threat management gateway picks up several roles. A stateful packet-filtering firewall establishes rules for packet inspection and connection monitoring. In addition to stateful filtering, the Forefront® TMG adds an application inspection method that watches over specific software and services running on servers and clients within the LAN it is protecting. Further included among the bevy of activities for the TMG is auditing email for spam and a malicious software inspection feature to prohibit the spread of viruses or other software that could compromise the security and stability of the network.

Additional functionality that enhances network performance is also a part of the threat management gateway. Forefront® TMG starts by compressing web traffic and then implementing a web cache to speed up access to commonly requested web sites. Another addition, specific to Microsoft® networks and software, is the use of the background intelligent transfer service (BITS). The TMG can download and cache software updates for clients and servers on the network, scheduling such large downloads for periods when the network is idle.

For Microsoft® Windows® computers on the LAN, additional client software works with the threat management gateway software in Forefront®. The client software is capable of intercepting outbound requests and sending them along to the TMG, which applies any rules established and then forwards the request out of the network. In case the request is for a location within the LAN, it is ignored by the TMG and sent along its way.

EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.