A perfect network setup in Oracle Cloud Infrastructure (OCI)

Background:
A Virtual Cloud Network is made up of the following components.

Compartment
Subnets
Route Tables
Internet Gateways
Dynamic Routing Gateways (DRG)
Security Lists
DHCP Options
Local Peering Gateways
Service Gateways

Let us set up a typical network setup to access OCI from your laptop:

Note: You should have an account in OCI to access it. after creating cloud account in OCI, use your URL and use your tenancy at end part of the URL

e.g., Here my OCI url with my tenant name.

https://console.ap-mumbai-1.oraclecloud.com/?tenant=tapati

Step-1:  create a compartment
Step-2: Create network settings:
Step 2.1: Now create security list before creating subnet
Step 2.2: Next create Route Table
Step 2.3: Create subnet now
Step 2.4: Add rules to Route Table

Step-1:  create a compartment

Cloud à Identity à Compartment

Create compartment à give your compartment name in the shown window like below

Then, click on create Compartment

Post creation:

Post creation of compartments, now you can proceed for your network settings.

This compartment concept is very new in OCI cloud to segregate your infrastructure as per requirement. Example, your DEV/TEST compartments can be separated to your production environment. In this way you will have purely different network setups based on environment type.

Let us proceed create Network settings.

Step-2 : Create network settings:

Cloud à Networking à Virtual cloud Networks

Virtual Cloud Networks à select your compartment à 


Click “Create Virtual Cloud network’”

Now click on “Create Virtual cloud Network”, post creation

Step 2.1 Now create security list before creating Subnet

Security list à  Create security list

Click on “create security list”

Post creation of security list

Step 2.2 : Next create Route Table

Click “Route Table”

STEP 2.3 : Create Subnet now

CHOOSE all options as selected in the screenshot

Click “Create Subnet”

CREATED one more subnet with another IP range

Now we need internet gateway to connect to OCI network from internet

Internet Gateway ß click

Click “Create Internet Gateway”

Step 2.4 : add rules to Route Table

Add router rules

Note: Here we used 0.0.0.0/0 to access via internet without any barrier

But in reality, we need to specify specific IP address as per the customer

e.g., to access visa we need to add visa IP address here.

Now your OCI cloud network setup is ready. you can create VMs or other Infrastructure and assign create network. Use Private key to access VMs like Linux from your local machine.