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Senior Editor Tim Greene clarifies issues surrounding the evolving NAC security architecture.

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Using NAC to backstop and supplement other apps
10/07/08
Recently a user of ForeScout NAC gear said he's had the equipment in place for more than a year and doesn't have it enforcing NAC policies yet, but still finds the device worthwhile.
Novell gets into NAC
10/02/08
Recently Novell decided to get into NAC with an OEM offer from StillSecure.
Interim NAC strategy
09/30/08
NAC would prove useful enough to one potential user of the technology that he is considering buying an interim NAC product for use over the next three years with the long-term intention of shifting to Microsoft's NAC flavor, network access protection.
Mirage Networks' new green product line
09/25/08
Mirage Networks is rolling out a new suite of hardware for its Sensor NAC appliances. The new suite fills in a few gaps in the old product line so customers can better find a device that fits their capacity needs as measured by how many endpoints each device supports.
NAC declared mature
09/23/08
A panel of NAC experts at Interop gave a broad overview of the status of the technology, which it declared mature, meaning that most vendors have a way to deal with devices that can't support a NAC client or per-session agent and support 802.1x enforcement.
The tradeoff between risk mitigation and productivity
09/18/08
NetClarity is shipping a new version of the software for its NACwall appliances that automatically checks the vulnerability of devices such as laptops that have been unplugged from networks and then return in an unknown security state.
Microsoft's NAC comes out on top
09/16/08
Microsoft comes out on top of the NAC heap in an evaluation of 10 vendors that was published recently by Forrester Research.
NAC vendors embracing virtual server environments
09/11/08
Mirage Networks has short-term plans to make its management platform available for installation on virtual servers, according to the company's CEO.
Napera addresses small businesses NAC needs
09/09/08
Napera is seeking a simple way to deploy Microsoft's flavor of NAC to small businesses.
Napera adds support for wireless networks to Microsoft NAP
09/04/08
Napera is introducing software that makes its Microsoft Network-Access Protection (NAP) gear compatible with wireless networks.
NAC adoption slowed by human learning curve
09/02/08
Perhaps the human learning curve is slowing down adoption of NAC, according to a college IT engineer.
NAC expected take a firm hold in business networks
08/28/08
NAC will take a firm hold in business networks within the next year, says Verizon Business.
An important element of NAC deployment
08/26/08
In discussing its NAC service, Verizon Business raises an issue that is an important element of any NAC deployment - getting diverse teams within an organization to work together on the project.
Verizon Business' NAC service
08/21/08
Verizon Business has announced a NAC service in which it helps customers decide what NAC product best fits its needs and then installs it.
802.1x-based NAC
08/19/08
A recent poll at a Gartner security conference indicates strong interest in 802.1x authentication that will feed into the network-based, identity driven model of NAC.
ConSentry's LANShield gear has NAC
08/14/08
ConSentry makes switches that support NAC, and that is how the company hyped itself when it started out, but the gear does a lot more.
Don't let NAC become a hinderance
08/12/08
It's important to remember that if NAC becomes a hindrance in networks it becomes a bad investment that gets blamed for preventing employees from doing their jobs.
Potential vulnerabilities in NAC clients
08/07/08
At the Black Hat conference this week, a researcher pointed out vulnerabilities that can be present in devices that rely on Active X to download clients.
Juniper and Microsoft become NAC compatible
08/05/08
Juniper has upgraded the software for its NAC gear, making it compatible out of the box with Microsoft's NAC scheme.
Using NAC to meet regulatory requirements
07/31/08
Recently, a NAC customer said the technology does well performing one of its primary functions - the often cited, access control for guests - and that was the primary reason they bought NAC.
NAC on-demand
07/29/08
Symantec is coming out with a new on-demand NAC client to go with its NAC appliance that brings features of the client more in line with the company's permanent NAC client.
Experts spar over NAC: In the blue trunks - usefulness; in the red trunks - cost
07/24/08
Earlier this month I urged readers to attend a live chat about NAC between Joel Snyder and Richard Steinnon because these two experts have strong, divergent and well-informed opinions.
Juniper makes good on its NAC promise
07/22/08
It looks like Juniper is following through on its promise to support NAC in its new EX LAN switches.
Top reasons for delaying NAC deployments
07/17/08
Demands of regulators, lower prices and improvements in NAC itself could drive potential customers to purchase the technology even though at the moment they have no plans to deploy it by 2009.
AEP rethinks its NAC strategy
07/15/08
When Lockdown Networks went belly up earlier this year, AEP Networks had to rethink its NAC strategy.

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Tim Greene is senior editor at Network World.

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