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Barracuda SSL VPN

Why is NAC reporting ?No Antivirus Detected? and blocking access to the Barracuda SSL VPN when I have an up-to-date anti-virus installed?

  • Type: Knowledgebase
  • Date changed: 3 years ago

Solution #00004850



Applies to all Barracuda SSL VPNs.



NAC will only check the anti-virus setting on Windows Operating Systems; this is due to the method that the Barracuda SSL VPN uses to check the security settings of client systems.


If NAC is set to block systems that do not have anti-virus software installed then it will run a command on the client system to check if Security Center registry settings report an anti-virus presence. As a result, anti-virus software that does not integrate with Security Center will not be recognized and reported back the NAC causing the connection to be blocked. It is also possible that some Enterprise Level Solutions also have problems fully integrating with Security Center. They are recognized by but not recorded in the registry causing the SSL VPN to not be aware of them. This behavior has been confirmed outside of a Barracuda Networks Test Environment.


Barracuda Networks Technical Support can provide more information regarding these issues and possible resolutions for some of the software products but it may be necessary to contact your anti-virus software vendor for specific instructions.


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