Need Clarification on Oracle Cloud Infrastructure Internet Gateway and Load Balancer
Last updated on MAY 20, 2018
Applies to:Oracle Compute Cloud Service - Version N/A and later
Information in this document applies to any platform.
There is a need to understand how internet web traffic flows for an application hosted on Oracle's Cloud Infrastructure (OCI). The application is hosted on two web servers running behind a Bare Metal OCI Load Balancer (LB). The understanding is that internet traffic enters the Virtual Cloud Network (VCN) via the OCI load balancer and then the LB routes the traffic to backend servers. The Internet Gateway (IGW) is not used for incoming internet traffic. The Internet Gateway is only used if any resources within the VCN need to reach out to the internet. But the traffic flow diagram above shows that incoming internet traffic also enters via IGW.
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