Q: How does AWS WAF protect your ALB and what rules would you set up for a web app?
WAF inspects HTTP requests before they reach the ALB. Rules: AWS Managed Rule Groups (OWASP top 10, bot control), IP rate limiting (preve...
#AWS #Cost & Architecture #L3 #Cloud #Infrastructure #ALB
🎙️ Candidate Opening & Architectural Context
""In a previous role, our monitoring paged me for a similar incident across our AWS VPC infrastructure. 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
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Production Solution & Architecture
WAF inspects HTTP requests before they reach the ALB. Rules: AWS Managed Rule Groups (OWASP top 10, bot control), IP rate limiting (prevent DDoS), geo-blocking, SQL injection detection, XSS detection. Set rules to block or count.
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: WAF inspects HTTP requests before they reach the ALB. Rules: AWS Managed Rule Groups (OWASP top 10, bot control), IP rate limiting."
⚡ 60-Second Elevator Pitch Talking Points
- Immediate Triage: WAF inspects HTTP requests before they reach the ALB. Rules: AWS Managed Rule Groups (OWASP top
- Run targeted verification commands before modifying configuration.
- Automate permanent guardrails (CI check, alerts, IaC policy) to prevent recurrence.
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