Q: How would you implement a zero-trust network architecture in AWS?
Remove all implicit trust. Use: IAM everywhere (not network location), security groups per-service (not per-subnet), mutual TLS between s...
#AWS #Cost & Architecture #L3 #Cloud #Infrastructure #IAM
🎙️ Candidate Opening & Architectural Context
""In our AWS cloud environment, we managed high-traffic microservices where this exact scenario occurred. When addressing this question, I walk the interviewer through our production incident runbook: isolating the blast radius, checking diagnostic logs and metrics, and applying a safe fix.""
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🛠️ Production Runbook & Step-by-Step Resolution
1️⃣
Production Solution & Architecture
Remove all implicit trust. Use: IAM everywhere (not network location), security groups per-service (not per-subnet), mutual TLS between services, VPC endpoints instead of internet, AWS PrivateLink for inter-service, GuardDuty + Security Hub for continuous threat detection, AWS Verified Access for user-to-app access without VPN.
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: Remove all implicit trust. Use: IAM everywhere (not network location), security groups per-service (not per-subnet), mutual TLS be."
⚡ 60-Second Elevator Pitch Talking Points
- Immediate Triage: Remove all implicit trust. Use: IAM everywhere (not network location), security groups per-serv
- Run targeted verification commands before modifying configuration.
- Automate permanent guardrails (CI check, alerts, IaC policy) to prevent recurrence.
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