Thursday, June 04, 2020

Oracle OCI Cloud - Connecting a Private VM from a Public Bastion Host

Introduction


The following outlines the configuration for connecting a backend private instance though a public instance in the same VCN but different subnets. 

This post talks about the necessary configurations of Router, Firewall, and builds a complete end-end example. 

High-Level Steps

  • Create VCN and two subnets (one public, one private)
  • Create VMs - one in each subnet
  • Configure Router
  • Configure Firewall
  • Test and Verify
  • Access to OCI Instance

Note this is part one of the multi-part series wherein we extend this example and do necessary configuration on OCI and try to establish Hybrid Connectivity to a private instance on Google Cloud (GCP) using VPN.

Pre-requisites

  • User with necessary privileges to create VCN, VM and configure networking
  • SSH key (public and private key pair) - Basic knowledge of networking - CIDR, Routers, Firewall, etc..

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