Understanding Legal Compliance in VPC Private Subnet Proxy Deployment
A Virtual Private Cloud (VPC) isolates your resources at the network layer. A private subnet takes that isolation deeper, shielded from direct internet access. When you place a proxy here, you decide which traffic escapes, which traffic enters, and under what rules. Legal compliance means aligning these rules with data protection laws, industry standards, and audit requirements. It covers encryption in transit, logging, data residency, and controlled access.
Core Requirements for Compliance
- Encryption Everywhere – TLS for all proxy traffic. No plaintext packets cross boundaries.
- Access Control Lists – Define explicit allow/deny lists in security groups and network ACLs.
- Logging with Retention Policies – Centralized logs stored per jurisdiction rules, immutable for audit.
- Data Residency Enforcement – Route only data allowed by local laws through specific proxies.
- Immutable Infrastructure – Deploy proxies through IaC templates that meet compliance baselines.
VPC Private Subnet Proxy Architecture
The deployment starts with the private subnet inside the VPC. The proxy runs on an EC2 instance or container service without public IP. Outbound access is through a NAT gateway with security restrictions. Inbound traffic hits the proxy via VPC peering, VPN, or Direct Connect from approved networks. Route tables prevent unauthorized paths. This architecture ensures the proxy enforces both technical and legal policies before traffic moves in or out.