Articles & Guides

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.

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.

Learn how SSL/TLS certificate pinning works, its security benefits, implementation methods, and when pinning is appropriate for your application.

Discover the improvements in TLS 1.3 over previous versions — faster handshakes, stronger security, and reduced latency for modern web applications.

How to monitor SSL certificates: auto-renewal, expiration dates, chain of trust, notifications. Preventing certificate-related downtime.

How to check a website's SSL certificate: step by step in Chrome, Firefox and Safari, with openssl and curl, or using an online checker. Certificate fields, the trust chain, a common errors table, and automated expiry monitoring.

Comparison of SSL certificate types: DV, OV, EV, Wildcard, and multi-domain. When to use Let's Encrypt vs. a paid certificate.

What a TLS certificate contains, why SSL and TLS certificates are the same thing, how to get one free, where to find it on your server and how to fix errors.