I have an OnPremise (SAP) system which exposes data via RESTful services and remote functions (RFC). How can I access these data from a Node.JS application running on AWS? Which AWS service will be useful in this scenario to connect to the OnPremise VPN to facilitate the connection?
How to access an OnPremise system from AWS using Node.JS
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There are two solutions for VPN connections: either a site-to-site VPN, which uses a customer gateway and a virtual private gateway. Alternatively, AWS Direct Connect is an actual physical connection between your on premise data center and an AWS data center.
DirectConnect offers much better performance, but requires third parties to install a physical cable, and so can take several days to implement. If you're looking for a solution that's independent of hardware, then a site-to-site VPN could be a good fit.
You need to make use of AWS Direct Connect to extend your on premise infrastructure with AWS.