Microsoft unveiled its latest feature within the Azure service model – the Hybrid Connection.
Hybrid Connections allow your Azure web site or mobile service to connect back into your internal network without the need for a VPN or opening up your firewall. Hybrid Connections support connections to HTTP Web APIs, Web Services and databases such as SQL Server or MySQL.
Essentially, the Hybrid Connection Manager acts as a proxy client in your network to connect OUT to Azure over port 5671 instead of having your web site connect IN to your network. The Hybrid Connection Manager sounds a lot like the Office 365 Data Management Gateway.