whitelist the IP address for accessing the Compute Instance in OCI

In Oracle Cloud Infrastructure (OCI), a whitelist is a security feature that allows you to specify a list of IP addresses or CIDR blocks that are permitted to access your resources.

A whitelist IP in Oracle Cloud is a list of approved IP addresses that can access a particular OCI resource, such as an instance, database, or storage bucket. When a whitelist is configured, only requests originating from the approved IP addresses can access the resource. All other requests are rejected by the OCI network security policies.

To add a whitelist IP in Oracle Cloud, you need to provide the IP address or range of IP addresses that you want to allow access to your resource. You can add the IP addresses manually or import a list of IP addresses from a file. Once the whitelist is set up, you can manage it by adding, deleting, or modifying the IP addresses as required.

Using a whitelist can help improve the security of your OCI resources by reducing the attack surface and limiting access to authorized users or systems. 

I had an existing security list and rules were defined as publicly open to all(0.0.0.0/0). Anyone having the public IP address of the compute instance and the key should have the access to the instance. Now, as part of this post, i want the restrict the access to only my machine. So, i am going to edit the existing rule and put my machine's IP address.

Now, if i try to login to the Compute instance, it should allow me to login.

This post illustrates a very basic security posture which we should maintain we spin off the instance very easily on the cloud. The access should not be open to all. Try to restrict the access as much as possible.

That's all for this post. I hope it will help someone. Till then, enjoy learning cloud.