This solution applies to all Barracuda SSL VPN units.
As of firmware 2.1 the SSL VPN fully supports Internet Explorer 9. This is achieved through forced compatibility mode causing the SSL VPN to force the client browser to automatically use Compatibility Mode when it is being accessed.
In firmwares earlier than 2.1, the SSL VPN is not fully compatible with Internet Explorer 9. The SSL VPN Agent is working correctly as are resources, the most noticable issues are contained to the user interface, most notibly the inability to select text boxes or add policies. These issues can be overcome by enabling Compatibility Mode within Internet Explorer 9, when Compatibility Mode is enabled any UI elements that are failing should behave correctly.
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