Oracle ICS Agent - When do we need it and how to create

Why do we need an Oracle ICS Agent? 

Often the question arises, what is the need of using an agent when ICS has so many adapters. Cloud based adapters are mostly API based which may or may not need needs firewall or VPN settings.

The on-premises connectivity agent enables you to create integrations between on-premises applications (example On-premise database) and Oracle Integration Cloud Service (ICS)

The below STEPS  are required to create the connectivity - 

Step1: Create an Agent Group in ICS. Save the configuration.
Step2: Open the agent and download the agent to the Linux environment of On Prem.
Step3: Execute the On-Premise Agent installer and on-premise Linux machine, the result will be a lightweight WebLogic server instance that will be running on port 7001.
Step4: Verify the agent count change from O to 1.

Detailed example can found here