Access Oracle Autonomous Database (ADB) resides in Private Subnet via Oracle Integration Cloud (OIC) connectivity agent

Recently came across interesting use case, so thought to cover blog on that topic. One of my Customer was having issue to connect OIC to Oracle Autonomous Database (ADB) which is sitting in private subnet via Oracle Integration Cloud connectivity agent. So, I did some debugging and fix the issue and that learning I am going to cover here. I will explain here how we can setup an ATP Database in private subnet, setup all required security/firewall rules, setup OIC connectivity agent, bastion compute in public subnet and then connecting OIC to ATP DB sitting in private subnet via Connectivity agent.

In this fictitious scenario, customer HR division representative sending employee code to OIC REST endpoint to retrieve detailed information for an employee record which is been stored in Oracle ADB instance located in private subnet. Since, ADB is in private subnet it’s not accessible to outside world even app tier, and that’s where OIC Connectivity agent comes into picture to provide connectivity between OIC which is public internet and ADB database which is in private subnet.

Please refer below network architecture diagram –

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