If you have been following the Network Access Control space at all over the past two years, you have probably heard the acronym IF-MAP tossed around at conferences, in vendor briefings, and in the occasional white paper that nobody outside of a standards committee actually reads cover to cover. The Trusted Computing Group's Interface for Metadata Access Points specification is one of those ideas that sounds almost too sensible to succeed in the enterprise security market. And that is precisely what worries me.

What IF-MAP Actually Is

At its core, IF-MAP is a client-server protocol that allows different security components to publish and consume metadata about network events, user identities, and device posture through a centralized Metadata Access Point (MAP) server. Think of it as a shared blackboard where your NAC appliance, your vulnerability scanner, your IDS, and your endpoint compliance tool can all post notes and read what the others have written.

The specification defines a SOAP-based protocol with three basic operations: publish, search, and subscribe. A security device publishes metadata to the MAP server. Other devices search for relevant metadata or subscribe to be notified when something changes. The metadata itself is extensible through XML schemas, so vendors can define their own data types while still conforming to the core protocol.

The elegance here is in the decoupling. Instead of requiring point-to-point integrations between every pair of security products in your stack - an n-squared problem that makes integration engineers weep - you get a hub-and-spoke model. Each product only needs to speak IF-MAP to the central server, and suddenly everyone can share intelligence.

Why This Matters for NAC

The NAC market has been plagued by interoperability problems since its inception. Cisco has NAC, Microsoft has NAP, the TCG has TNC, and a dozen smaller vendors have their own proprietary approaches. An enterprise that buys Cisco switches, Juniper firewalls, and a third-party endpoint agent is stuck trying to make three different vendors' ideas about access control play nicely together.

IF-MAP addresses this by sitting above the access enforcement layer. It does not replace 802.1X or RADIUS or any of the mechanisms that actually block or permit traffic. Instead, it provides a common data layer where all of those enforcement points can share context about what they know and what they have decided. Your IDS detects suspicious behavior and publishes that to the MAP. Your NAC solution subscribes to those events and can quarantine the offending device. No custom integration required - at least in theory.

The Adoption Problem

Here is where my skepticism kicks in. IF-MAP version 1.0 was published in April of this year, and we are now in November with a handful of proof-of-concept implementations and not much else. Juniper and Infoblox have demonstrated interoperability. A few smaller vendors like Great Bay Software have announced support. But the two elephants in the room - Cisco and Microsoft - have been conspicuously quiet.

Cisco has little incentive to adopt a standard that would make it easier for customers to swap out Cisco NAC components for competitors. Their entire security architecture story is built around the value of an all-Cisco stack. Microsoft, for its part, has NAP baked into Windows Server 2008 and seems content to let that serve as the de facto standard for Windows-centric environments.

Without those two on board, IF-MAP risks becoming an interoperability standard for the vendors who already interoperate because they have to - the smaller players who cannot afford to build walled gardens.

What I Would Like to See

The TCG needs to move beyond conference demos and get IF-MAP into shipping products that enterprises are actually buying. That means reference implementations, certification programs, and frankly some pressure from the analyst community to make IF-MAP support a checkbox item in RFPs.

It also means the specification needs to mature. Version 1.0 is a solid start, but there are open questions about scalability, about how to handle metadata conflicts when two sources disagree, and about security of the MAP server itself - which becomes a rather attractive target if it contains a real-time map of your entire network's security state.

I remain cautiously optimistic about IF-MAP. The concept is sound. The need is real. But sound concepts and real needs have a long history of losing to vendor politics and market inertia in this industry. If IF-MAP is still limited to conference demos this time next year, we will have our answer.