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.
Link to this page: