Get data from SQL Server without forwarding the port

I need to provide access via mobile web (asp.net) to small pieces of data (Just total's of the day etc.) that resides at our customers SQL Server, it would be to much of work for me to set up port forwarding and configure all ip's for each and every customer.

So I'm thinking of an alternate way to achieve that, I think maybe to make a small program running on the customers server that would push updates 开发者_如何学运维to our db, they may be an option. but I hope there's an easier way of doing that.

Any advice?

Will http endpoints work for you?