The VPC logs told the story. A private subnet with no direct Internet gateway had seen unusual proxy traffic. That’s where enforcement fails most often — not at the perimeter, but deep inside, where a proxy misstep or missing control becomes a direct path to exposure. An Enforcement VPC Private Subnet Proxy Deployment fixes that before it starts.
You build the VPC with strict boundaries. No public IPs. No unmanaged egress. The proxy lives inside a locked subnet, inspected and routed only through controlled endpoints. Every packet hits policy before it leaves. Enforcement isn’t a single setting. It is an architecture — uniform, reproducible, and testable.
A proper deployment starts with dedicated subnets for internal services, defined route tables that push all outbound through the proxy tier, and security group rules that deny everything except the needed flows. Network ACLs enforce another layer. IAM policies bind access so no one bypasses the proxy. Even DNS resolution routes through trusted resolvers so data exfiltration via name lookups is blocked.
The proxy itself should support full TLS inspection, authenticated connectivity, and detailed logging. Scaling horizontally ensures you don’t trade performance for control. Integration with SIEM systems makes every session traceable. The enforcement layer is not just a box. It is visibility, control, and proof.