Cram Session: Network Access Control

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NAC appliances reveal who's rapping at your network door

As comprehensive as this appliance is, it does have one flaw: Instead of a Java or ActiveX scan engine, Vernier uses SMB credentials to gain access to the client. The scan engine needs a user name and password with rights to the local device in order to perform a thorough policy compliance check. This requirement also means that Mac and UNIX hosts cannot be scanned to the same level as Windows hosts. The end point compliance service, however, can scan a host for open ports or other vulnerabilities that don't require local access to the system. I like that I could scan a host during authentication and also rescan the host on a recurring interval. This feature helps prevent users from disabling their anti-virus software after logging in. If this should happen, the EdgeWall would move the client into the appropriate policy until it was back in compliance.

Reporting is one weak area in EdgeWall. Admins can send log file information to a Syslog server or directly to a Network Intelligence system. Raw log files are available on the appliance, and you can apply some basic filters such as time period and severity, but graphical reports or user statistics are not available.

All of the NAC appliances I reviewed need some improvement, but Caymas and Vernier are clearly on the right track. When Nevis releases its host assessment service, and if the company works on its UI, its solution will be worth consideration. Lockdown is interesting because it doesn't require IT to rip and replace a closetful of switches (a la Cisco); it works with what is already in place. Its use of VLANs is unique but does cause us to worry about scalability and flexibility. When deployed with some foresight, however, it will work well.



Caymas 525 Identity-Driven Access Gateway

Caymas Systems, caymassystems.com

Very Good  8.1
criteria score weight
Manageability 8 20%
Policy Enforcement 8 20%
Scalability 9 20%
Reporting 8 15%
Setup 8 15%
Value 7 10%

Cost:
$70,000 for 5,000 users with all features enabled

Bottom Line:
The 525 Identity-Driven Access Gateway blurs the line between SSL VPN and NAC device. The policy enforcement is good and doesn’t have any gaping holes, although it does have the feel of an SSL VPN appliance. End point assessment works well, with only minor shortcomings. A decent array of reporting choices makes reporting very good.

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Lockdown Networks Enforcer

Lockdown Networks, lockdownnetworks.com

Good  7.9
criteria score weight
Manageability 7 20%
Policy Enforcement 8 20%
Scalability 8 20%
Reporting 9 15%
Setup 8 15%
Value 7 10%

Cost:
1U model, $24,995; 2U model, $39,995; Commander, $9,995; Sentry, $1,495

Bottom Line:
The Enforcer takes a different approach on providing network security. Instead of inspecting packets and applying policy, it places traffic in a VLAN on a per-port basis on a managed Ethernet switch. Scalability for large enterprises is a question, but for smaller networks, creating the VLAN-base security scheme shouldn’t be a problem. End point assessment is well rounded.

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Nevis LANenforcer

Nevis Networks, nevisnetworks.com

Good  7.2
criteria score weight
Manageability 7 20%
Policy Enforcement 7 20%
Scalability 7 20%
Reporting 8 15%
Setup 7 15%
Value 7 10%

Cost:
LANenforcer, $19,995; LANsight management software, $2,000

Bottom Line:
The LANenforcer is on the cusp of being a major player in the NAC space. Security policy is rich but difficult to manage, largely because of a clumsy UI. Host assessment is missing in this release, but the forthcoming Client Integrity Checking will fill this gap very well. Historical reporting is weak, but real-time monitoring is strong.

About our Reviews and Scoring Methodology



Vernier Networks EdgeWall 7000

Vernier Networks, verniernetworks.com

Very Good  8.0
criteria score weight
Manageability 8 20%
Policy Enforcement 8 20%
Scalability 8 20%
Reporting 7 15%
Setup 8 15%
Value 9 10%

Cost:
Price ranges from $9,000 to $31,000

Bottom Line:
Vernier’s EdgeWall 7000 proved to be a good all-around solution to the NAC problem. Policy enforcement is rock steady, and end point assessment is a good mix of compliance and vulnerability checking. On-device reporting is the one area where EdgeWall could use some work, but it can communicate with Network Intelligence for off-box analysis.

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