Mani Sri Kumar
Security Engineer
Mani Sri Kumar is a Security Engineer at QCecuring, focused on certificate lifecycle management, PKI automation, and enterprise security infrastructure.
43 articles published
Certificate Lifecycle Management
What a $0 Certificate Outage Prevention Strategy Looks LikeFree and open-source approaches to certificate monitoring using PowerShell scripts, certutil queries, cron jobs, and Prometheus exporters — when free is enough and when you've outgrown it.
18 Aug, 2026 · 06 Mins read
Certificate Lifecycle Management
The Difference Between Public Certificates and Internal CertificatesPublic vs internal certificates explained — different CAs, different management approaches, different risks, and why managing one doesn't mean you manage the other.
17 Aug, 2026 · 05 Mins read
Certificate Lifecycle Management
How to Convince Your Manager You Need Certificate VisibilityChampion enablement content with talking points for budget approval, cost justification frameworks, risk framing, one-pager templates, and objection handling for certificate lifecycle management.
17 Aug, 2026 · 06 Mins read
PKI Architecture
PKI for IT Teams: What You Actually Need to Know (No Crypto Theory)A practical PKI explainer for IT operations teams — skip the math, focus on what breaks, how certs work in enterprise, CA hierarchy simplified, and what IT teams interact with daily.
16 Aug, 2026 · 05 Mins read
Certificate Lifecycle Management
Certificate Lifecycle Management Explained in 5 MinutesA clear, concise explainer of Certificate Lifecycle Management (CLM) — what it covers, who needs it, how it differs from just having a CA, and why it matters for enterprise security operations.
15 Aug, 2026 · 05 Mins read
Certificate Lifecycle Management
The Certificate That Expired on a Load Balancer (And Nobody Noticed for 3 Days)A real-world story of an F5 load balancer certificate expiry that went undetected for 3 days due to partial failure mode, plus detection strategies and prevention methods.
14 Aug, 2026 · 05 Mins read
AD CS
How One Misconfigured Cert Template Broke Auto-Enrollment for 500 DevicesA deep dive into AD CS template misconfiguration that caused cascading auto-enrollment failure across 500 devices, including troubleshooting with certutil and a prevention checklist.
14 Aug, 2026 · 05 Mins read
Certificate Lifecycle Management
Why New Employees Can't Connect to WiFi (The Certificate Angle)802.1X onboarding failures, machine certificate provisioning gaps, RADIUS/NPS certificate dependencies, Intune/SCCM enrollment issues, and proven fix patterns for enterprise wireless authentication.
13 Aug, 2026 · 05 Mins read
Certificate Lifecycle Management
When Exchange Stops Working: The Hidden Certificate CauseExchange and Outlook certificate dependencies, real outage scenarios, certificate services in Exchange (SMTP, IIS, POP), troubleshooting steps, and prevention strategies.
12 Aug, 2026 · 04 Mins read
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