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Barracuda Web Security Service

Why do I get the error "unable to connect to the MKS internal error" when using Vsphere and the Barracuda Web Security Agent?

  • Type: Knowledgebase
  • Date changed: 8 years ago

Solution #00004961



Applies to Barracuda Web Security Flex.



To communicate with ESX/ESXi hosts the Barracuda Web Security Agent uses ports 80 and 443 by default. The following executable needs to be exempted in Configuration > Advanced > Exceptions (under the Default Filter Settings section) if you are getting the “unable to connect to the MKS internal error” message:




Alternatively, Vsphere will also work with the WSA if you select the "Filter specified applications and allow all others" option under Configuration > Advanced > Default Filter Settings.


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