Articles & Guides
Useful resources for web developers and system administrators
Found 43 · SSL/TLS · Reset
SSL/TLS
Mixed Content: How to Find and Fix HTTP on HTTPS Sites
Mixed content blocks scripts, styles and iframes on HTTPS pages. Active vs passive, finding every http URL in code and database, CSP reports, regression control.
SSL/TLS
SSL Handshake Failed: What Causes It and How to Fix It
Client and server could not agree on the TLS version, cipher, SNI or certificate. Find the failing step with openssl and curl, then fix that step.
SSL/TLS
Expired SSL Certificate: How to Fix NET::ERR_CERT_DATE_INVALID
Renewing is rarely where the time goes: the certificate is often already renewed and the server still serves the old one. Find which failure you actually have.
SSL/TLS
How to Check SSL Certificate and Never Miss Expiration
How to check an SSL certificate: via browser, OpenSSL, and online tools. Certificate types, trust chain explained, and automated expiration monitoring.
SSL/TLS
Certificate Transparency: Detecting Rogue Certificates
Understand how Certificate Transparency logs work, why they matter for web security, and how to monitor CT logs to detect unauthorized certificates issued for your domain.
SSL/TLS
TLS Handshake Explained: Step by Step
Understand the TLS handshake process step by step. Compare TLS 1.2 vs 1.3, learn about performance implications, and optimize your SSL/TLS configuration.
SSL/TLS
Wildcard SSL Certificate: Coverage, Cost and Free Setup
What a wildcard SSL certificate covers and what it misses, free vs paid options, Let's Encrypt DNS-01 commands, CAA issuewild and the 2026–2029 validity cuts.
SSL/TLS
SSL Pinning: What It Is and When to Use It
Learn how SSL/TLS certificate pinning works, its security benefits, implementation methods, and when pinning is appropriate for your application.
SSL/TLS
TLS 1.3: What Changed and Why It Matters
Discover the improvements in TLS 1.3 over previous versions — faster handshakes, stronger security, and reduced latency for modern web applications.
SSL/TLS
SSL Certificate Monitoring: Avoiding Downtime
How to monitor SSL certificates: auto-renewal, expiration dates, chain of trust, notifications. Preventing certificate-related downtime.