Receive Connectors best practice

Hi,

I and running Exchange 2010 and  have a question re the Receive Connectors.

I am using an appliance in my DMZ – Barracuda and this is considered as "anonymous" so with this in mind should I

1.       Leave the Client & Default as default and
2.       Create a new Receive Connector, add the IP address of my Barracuda server IP here and tick the anonymous users tick box

Thanks