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AWS Solutions Library

Guidance for Network Security on AWS

Protect your workloads by using cloud security services for VPC isolation and firewall rules

Architecture Diagram

These technical details feature an architecture diagram to illustrate how to effectively use this solution. The architecture diagram shows the key components and their interactions, providing an overview of the architecture's structure and functionality step-by-step.

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Additional Considerations

Building secure networks in the cloud is fundamentally different from building them in a private, on-premises environment. With secure networks in the cloud, the cloud provider handles certain tasks on your behalf, such as the management and governance of physical devices, their environment, or the security controls that surround them. You build and secure your network within a virtual environment and use identity and access controls that may span multiple workload boundaries to administer and secure access to your network. 

As such, it is important that organizational stakeholders who hold responsibility for your network security are familiar with the shared responsibility model between you and your cloud provider for securing your cloud environment. These stakeholders should know best practices for providing identity and access in addition to granting least privilege permissions across relevant workloads that your networks span. 
There are many cloud-native and third-party tools available to help you secure your network. Every organization's security requirements and level of compliance will differ. It is important to establish your security requirements and implement a baseline of controls across your networks as you consider which security tools to implement in your cloud environment. Requirements and compliance will also differ per application, so you must be able to add enhanced security controls on a case-by-case basis. 
You should account for traffic flow between your applications and clients and how your requirements will change based on locations between the clients. Consider how traffic should flow into the network, either through the internet, a virtual private network (VPN), or a dedicated connection. You must also determine how application layers will communicate with each other and other external dependencies, how traffic will egress from your network externally, and most importantly, how all these traffic flows need to be inspected and secured. Understanding your security responsibilities and requirements is critical for establishing your network security best practices and workflows in the cloud.

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