My latest post on the Oracle SOA and Fusion Middleware blogs discusses the various connectivity options for cloud to on-premise integration. A lot of emphasis has been put earlier on connectivity TO the cloud SaaS applications, and integration on the cloud (SaaS-to-SaaS or PaaS-to-SaaS). Connectivity FROM the cloud to on-premise is typically relegated as an after-thought, with the de-facto assumption being “we’ll just use VPN” to handle any firewall issues.
This post discusses the different approaches, VPN included, that you should consider when designing this inbound on-premise integration pattern. Read the full post here.