An ISO 27001 VPC private subnet proxy deployment is not just about compliance. It is the line between controlled access and exposed infrastructure. The proxy sits inside the private subnet, inspecting, logging, and filtering traffic before it touches critical systems. It enforces separation of duties, ensures encryption in transit, and provides a single choke point for monitoring.
To meet ISO 27001 control requirements, start with network segmentation. The private subnet must have no direct public internet access. Only the proxy interface should connect to approved endpoints. Use security groups and route tables to enforce this isolation. Keep IAM policies tight—grant least privilege at every layer.
Deploy the proxy with hardened configurations. TLS 1.2 or higher for all traffic. Disable weak cipher suites. Integrate centralized logging with immutable storage, aligned with audit trail requirements. Patch regularly through an automated pipeline that includes rollback plans.
Monitor continuously. ISO 27001 demands ongoing risk assessment, not one-time setup. Set alerts for unusual traffic patterns. Forward logs to SIEM tools for correlation. Confirm that the proxy’s health checks run at strict intervals.