Meeting compliance requirements for VPC private subnet proxy deployment isn’t about passing a single check. It’s about proving — with evidence — that every layer of your architecture is locked down, monitored, and built to spec. Fail at any one part, and your system is out of alignment.
A private subnet gives you isolation, but isolation alone does not make you compliant. Regulatory frameworks demand specific controls: encryption in transit and at rest, logged egress patterns, IAM policies scoped to the minimum required actions, and network ACLs that match documented boundaries. Security groups must deny everything except what you explicitly permit. Your NAT gateways and proxies must be defined, auditable, and patched to remove known vulnerabilities.
A compliant proxy deployment inside a VPC private subnet keeps traffic off the public internet while routing through a controlled, observable layer. SSL/TLS termination, certificate rotation policies, and controlled outbound traffic lists are not optional. Every request must be logged, correlated with user or service identity, and stored in an immutable system for the retention period your regulatory framework demands.