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BNবাংলা#TLS
TLS is the protocol that encrypts the connection between a browser and a web server, and it is what people usually mean by SSL today. Articles tagged here explain TLS versions, cipher settings, certificate chains and handshake errors. They show how to disable outdated protocols without locking out real visitors. You will learn how to read common browser error codes and what each one says about the server. The guides include commands and settings for popular servers and hosting panels. Use them when a TLS test gives a poor grade or a connection fails.
Oct 1, 2026 · 8 min readSSL Private Keys: How to Store, Protect and Replace Them
Your SSL certificate is only as safe as its private key. Learn where keys should live, who may access them, and what to do…
Oct 1, 2026 · 8 min readSelf-Signed SSL Certificates: When Are They Acceptable?
Self-signed certificates encrypt traffic but browsers do not trust them. Learn where they are acceptable, where they are risky, and the better free options.
Oct 1, 2026 · 8 min readSMTP Ports 25, 587 and 465: Which One Should You Use?
Port 25, 587 or 465? Learn what each SMTP port is for, which to use for your website or mail app, and how to…
Sep 29, 2026 · 7 min readTLS 1.3 Explained: Why It Is Faster and How to Enable It
TLS 1.3 makes HTTPS connections faster and removes weak cryptography. Learn what changed, how to check your server and how to enable it safely.
Sep 25, 2026 · 7 min readSSL Certificates Are Moving to 47 Days: What Site Owners Must Do
Maximum SSL certificate lifetimes are falling step by step to 47 days by 2029. Learn the timeline, who is affected and how to prepare…
Sep 24, 2026 · 8 min readHow to Automate SSL Renewal With Certbot (and Verify It Works)
Set up Certbot so Let's Encrypt certificates renew automatically: timers, reload hooks, DNS challenges behind CDNs, dry runs and checks for silent failures.
Sep 20, 2026 · 7 min readCertificate Transparency Logs: Every Certificate for Your Domain
Every public SSL certificate is recorded in certificate transparency logs. Learn how to search them, what to look for and how to monitor your…
Sep 18, 2026 · 8 min readSSL Certificate Revocation: When and How to Revoke a Certificate
Revoking a certificate tells browsers to stop trusting it before it expires. Learn when revocation is needed, how CRLs and OCSP work and how…
Sep 14, 2026 · 8 min readDNSSEC Explained for Website Owners: Is It Worth Enabling?
DNSSEC signs your DNS records so resolvers can detect forged answers. Learn how it works, what it protects, the risks of misconfiguration and how…
Sep 6, 2026 · 7 min readCDN SSL Modes Explained: Flexible vs Full vs Full (Strict)
Flexible, Full and Full (Strict) decide whether traffic between your CDN and server is encrypted and verified. Learn the risks and how to switch…
Sep 4, 2026 · 8 min readHow to Get an A Grade in an SSL Server Test: A Practical Guide
A poor SSL test grade usually comes from old protocols, weak ciphers, chain issues or missing HSTS. Learn what the tests check and how…
Sep 3, 2026 · 8 min readNET::ERR_CERT_AUTHORITY_INVALID: Causes and How to Fix It
ERR_CERT_AUTHORITY_INVALID means the browser does not trust who issued your certificate. Learn how self-signed certificates, chains and proxies cause it.