Security
How to Diagnose SSL Hostname and Certificate-Chain Errors
Learn how to diagnose SSL hostname mismatches, incomplete certificate chains, wrong CDN certificates, wildcard coverage, and TLS trust errors.
Field notes
Practical Cloud and DevOps Solutions
Production-tested guidance from cloud incidents, architecture decisions and deployment work.
Incident Response
AWS EC2 Blocked for Outbound Abuse: Investigation and Recovery
An incident-response workflow for AWS abuse notices, suspicious outbound SSH behavior, containment, evidence review and staged restoration.
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Engineering field notes
Evidence-led guidance for diagnosing, recovering and improving production systems.
Containers & Kubernetes
NGINX 499 and PHP-FPM Failures in Kubernetes: A Practical Investigation
How to investigate NGINX 499 responses, PHP-FPM target-port mismatches, pod health, MySQL saturation and rollback paths in Kubernetes.
Platform: KubernetesLinuxTechnologies: MySQLNGINXPHP-FPM
Incident Response
AWS EC2 Blocked for Outbound Abuse: Investigation and Recovery
An incident-response workflow for AWS abuse notices, suspicious outbound SSH behavior, containment, evidence review and staged restoration.
Platform: AWSLinuxTechnologies: EC2Incident ResponseSecurity Groups
Performance & Reliability
CloudFront Redirect Loop: How Cached 301/302 Responses Cause Production Failures
How viewer redirects, origin redirects, cache keys and Location headers combine to create CloudFront redirect loops.
Platform: AWSTechnologies: CloudFrontDNSHTTPWordPress
Cloud Architecture
ECS Service Connect vs Cloud Map Service Discovery
A practical decision matrix for ECS Service Connect, Cloud Map DNS discovery, namespaces, aliases, ports and migration constraints.
Platform: AWSTechnologies: Cloud MapECSService Discovery
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