Your company hosts web services in the company intranet.  The intranet is secured by a firewall.  
Devices outside the firewall must be able to access the web services.  Company policies prohibit changes to firewall rules. 
You need to recommend an approach for enabling inbound communication. 
What should you recommend？（）

An on-premise .NET application uses an on-premise Microsoft SQL Server 2008 database.  The existing compute infrastructure is insufficient to support peak loads.  
You plan to move only the compute-intensive component of the application into Windows Azure.  The component requires access to the on-premise database.  
The on-premise database cannot be accessed from outside the network boundary. 
You need to recommend a database topology. 
What should you recommend？（）