Infrastructure Architecture Diagram

It is a visual representation of an organization's IT environment. It should include system components, network boundaries, data flows, IP ranges, virtual private networks (VPNs), bastion hosts, databases, and third-party integrations to clearly illustrate how the product or service is securely delivered.

To create one for an audit, start by mapping out all critical systems and hosting environments. Clearly delineate trust boundaries, such as public versus private subnets, and label all data ingress and egress points. Ensure all nodes are named, functions are defined, and security controls like firewalls are explicitly shown. If you use WatchDog Security, you can store the diagram as evidence in Secure File Sharing and map it to applicable controls in Compliance Center so it is easy to find during an audit.

Auditors expect sufficient detail to understand the logical flow of data and the enforcement of security boundaries. This includes component names, environment labels (such as production versus non-production), IP address ranges, port configurations, and clearly marked points of external connectivity or integration. WatchDog Security Asset Inventory can help validate that the listed components and integrations reflect the current environment, reducing gaps between the diagram and what is actually deployed.

They support organizational and technical controls related to network security, segregation of networks, separation of development, testing, and production environments, as well as business continuity readiness. They provide visual evidence that appropriate network segmentation and secure engineering principles are actively applied.

Documenting cloud architecture involves leveraging provider-specific icons to map out virtual private clouds (VPCs), subnets, load balancers, and managed services. The documentation must clearly indicate security groups, identity and access management (IAM) perimeters, and data-at-rest storage locations to support audit and compliance requirements. WatchDog Security Posture Management can provide supporting evidence by flagging common cloud misconfigurations (such as public exposure or overly permissive rules) that should be reflected in the diagram and remediation plan.

Yes, maintaining separate or clearly demarcated diagrams is highly recommended. It serves as direct evidence that development, testing, and production environments are properly separated, helping ensure that non-production systems do not have unauthorized access to production data or networks.

These documents should be reviewed at planned intervals—typically at least annually—or whenever significant changes occur to the IT infrastructure, such as the introduction of new cloud services, major network reconfigurations, or significant updates to the system architecture. WatchDog Security can make this easier by tracking review cadence and evidence packaging in Compliance Center and capturing diagram-related gaps as formal entries in Risk Register with owners and due dates.

Auditors accept diagrams from standard tools like Visio, Lucidchart, and draw.io, provided the output is accurate, version-controlled, and legible. Cloud-native automated mapping tools can also be useful when they generate clear, reviewable diagrams that match the implemented infrastructure.

Use directional arrows to illustrate data flows, specifically noting encrypted versus plaintext channels. Trust boundaries should be depicted using encompassing bounding boxes or dashed lines, while third-party connections should be explicitly labeled with the external service name and the protocol used.

Yes, an architecture diagram is commonly used as evidence for network security controls. It visually demonstrates how networks and devices are segmented, managed, and protected, including the placement of firewalls, subnets, and secure access pathways.

WatchDog Security can link your infrastructure architecture diagram to the exact controls and evidence requests that rely on it using Compliance Center, so audits are faster and less manual. Asset Inventory helps keep the diagram aligned with reality by continuously discovering multi-cloud assets and mapping identities and SaaS connections. You can also store the diagram and supporting screenshots in Secure File Sharing with access logs for cleaner evidence handling.

WatchDog Security Posture Management runs agentless checks to detect misconfigurations that often contradict diagrams, such as overly permissive security groups, public exposure, or missing segmentation controls. Asset Inventory provides continuous visibility into what actually exists across cloud accounts and key SaaS platforms, which helps teams keep diagrams accurate. When gaps are found, Risk Register can capture them as tracked risks with owners, due dates, and treatment plans.