Replicating data over the Internet allows remote, disconnected users to access data when they need it using a connection to the Internet. Replicate data over the Internet using:
A Virtual Private Network (VPN). For more information, see Publish Data over the Internet Using VPN.
The Web synchronization option for merge replication. For more information, see Web Synchronization for Merge Replication.
All types of Microsoft SQL Server replication can replicate data over a VPN, but you should consider Web synchronization if you are using merge replication.