Elastic Cache: Redis Connectivity from the Internet

By default, Redis clusters deployed in Amazon ElastiCache are configured to be accessible only from within your Amazon Virtual Private Cloud (VPC) even if it resolves to a public IP outside VPC and cannot be directly accessed from the internet. This is done to provide a secure and isolated environment for your Redis cache.

However, if you need to connect to your Redis cache from the internet, you have a couple of options:

1. VPC peering: You can establish a VPC peering connection between your VPC and another VPC or network that has internet connectivity. This allows you to route traffic from your network to the VPC containing your ElastiCache Redis cluster. You'll need to configure the necessary networking components, such as route tables and security groups, to allow the traffic to flow securely.

2. VPN or Direct Connect: You can set up a VPN (Virtual Private Network) or AWS Direct Connect connection to establish a secure and private network connection between your on-premises environment or remote network and your VPC. This enables you to access the Redis cluster over the VPN or Direct Connect connection.

It's important to consider the security implications when allowing direct internet access to your Redis cache. Make sure to implement appropriate security measures, such as encryption, authentication, and access controls, to protect your Redis data from unauthorized access.

Note that the specific steps for setting up internet access to your Redis cache will depend on your network architecture, security requirements, and AWS setup. It's recommended to consult the AWS documentation and consider engaging an AWS networking specialist to help design and implement the appropriate connectivity solution for your specific use case.