CheckSSLExpiry Blog & Security Guides https://checksslexpiry.com/blog Technical guides, comparisons, and best practices for SSL/TLS certificate monitoring and expiry prevention. en-us Mon, 17 Aug 2026 20:12:55 GMT <![CDATA[Top 10 SSL Certificate Expiry Monitoring Tools Compared (2025/2026)]]> https://checksslexpiry.com/blog/top-10-ssl-certificate-monitoring-tools-compared https://checksslexpiry.com/blog/top-10-ssl-certificate-monitoring-tools-compared Sat, 15 Feb 2025 08:00:00 GMT Comparisons <![CDATA[Google's 45-Day SSL Validity Proposal: Why Automated Monitoring Is Now Critical]]> https://checksslexpiry.com/blog/google-45-day-ssl-certificate-lifecycle-guide https://checksslexpiry.com/blog/google-45-day-ssl-certificate-lifecycle-guide Fri, 14 Feb 2025 09:00:00 GMT Security Architecture <![CDATA[How to Check SSL Certificate Expiry Date: Browser, OpenSSL, cURL & Automated Scripts]]> https://checksslexpiry.com/blog/how-to-check-ssl-certificate-expiry-date-cli-browser-guide https://checksslexpiry.com/blog/how-to-check-ssl-certificate-expiry-date-cli-browser-guide Thu, 13 Feb 2025 10:00:00 GMT Guides <![CDATA[How to Fix NET::ERR_CERT_DATE_INVALID: Complete Troubleshooting Guide]]> https://checksslexpiry.com/blog/how-to-fix-net-err-cert-date-invalid https://checksslexpiry.com/blog/how-to-fix-net-err-cert-date-invalid Wed, 12 Feb 2025 11:00:00 GMT Troubleshooting <![CDATA[Why Automated Certbot & ACME Certificate Renewals Silently Fail (And How to Prevent Outages)]]> https://checksslexpiry.com/blog/why-automated-acme-certbot-renewals-fail https://checksslexpiry.com/blog/why-automated-acme-certbot-renewals-fail Tue, 11 Feb 2025 12:00:00 GMT Security Architecture <![CDATA[How to Fix SSL_ERROR_RX_RECORD_TOO_LONG in Firefox & Chrome]]> https://checksslexpiry.com/blog/ssl-error-rx-record-too-long-firefox-fix https://checksslexpiry.com/blog/ssl-error-rx-record-too-long-firefox-fix Mon, 10 Feb 2025 10:00:00 GMT Troubleshooting <![CDATA[How to Fix NET::ERR_CERT_AUTHORITY_INVALID in Chrome & Edge]]> https://checksslexpiry.com/blog/net-err-cert-authority-invalid-fix https://checksslexpiry.com/blog/net-err-cert-authority-invalid-fix Sun, 09 Feb 2025 14:00:00 GMT Troubleshooting <![CDATA[How to Fix NET::ERR_CERT_COMMON_NAME_INVALID (Hostname Mismatch)]]> https://checksslexpiry.com/blog/net-err-cert-common-name-invalid-fix https://checksslexpiry.com/blog/net-err-cert-common-name-invalid-fix Sat, 08 Feb 2025 11:00:00 GMT Troubleshooting <![CDATA[How to Fix ERR_SSL_VERSION_OR_CIPHER_MISMATCH in Nginx & Apache]]> https://checksslexpiry.com/blog/err-ssl-version-or-cipher-mismatch-fix https://checksslexpiry.com/blog/err-ssl-version-or-cipher-mismatch-fix Fri, 07 Feb 2025 09:00:00 GMT Troubleshooting <![CDATA[How to Fix SEC_ERROR_UNKNOWN_ISSUER in Mozilla Firefox]]> https://checksslexpiry.com/blog/sec-error-unknown-issuer-firefox-fix https://checksslexpiry.com/blog/sec-error-unknown-issuer-firefox-fix Thu, 06 Feb 2025 12:00:00 GMT Troubleshooting <![CDATA[How to Troubleshoot & Fix ERR_SSL_PROTOCOL_ERROR in Chrome]]> https://checksslexpiry.com/blog/err-ssl-protocol-error-troubleshooting https://checksslexpiry.com/blog/err-ssl-protocol-error-troubleshooting Wed, 05 Feb 2025 10:00:00 GMT Troubleshooting <![CDATA[Cloudflare Error 525 (SSL Handshake Failed): Root Causes and Step-by-Step Fixes]]> https://checksslexpiry.com/blog/cloudflare-error-525-ssl-handshake-failed-fix https://checksslexpiry.com/blog/cloudflare-error-525-ssl-handshake-failed-fix Tue, 04 Feb 2025 11:00:00 GMT Troubleshooting <![CDATA[Cloudflare Error 526 (Invalid SSL Certificate): How to Fix Expired or Untrusted Origin Certificates]]> https://checksslexpiry.com/blog/cloudflare-error-526-invalid-ssl-certificate-fix https://checksslexpiry.com/blog/cloudflare-error-526-invalid-ssl-certificate-fix Mon, 03 Feb 2025 10:00:00 GMT Troubleshooting <![CDATA[Wildcard SSL vs Multi-Domain (SAN) Certificates: Security Tradeoffs, Cost & Performance]]> https://checksslexpiry.com/blog/wildcard-vs-multi-domain-san-ssl-certificates https://checksslexpiry.com/blog/wildcard-vs-multi-domain-san-ssl-certificates Sun, 02 Feb 2025 09:00:00 GMT Security Architecture <![CDATA[How to Renew Let's Encrypt SSL Certificates on Ubuntu, Debian, and CentOS (Nginx & Apache Guide)]]> https://checksslexpiry.com/blog/how-to-renew-lets-encrypt-ssl-certificate-apache-nginx https://checksslexpiry.com/blog/how-to-renew-lets-encrypt-ssl-certificate-apache-nginx Sat, 01 Feb 2025 10:00:00 GMT Guides <![CDATA[TLS 1.3 vs TLS 1.2: Handshake Speed, 0-RTT, Ciphers, and Performance Benchmark]]> https://checksslexpiry.com/blog/tls-1-3-vs-tls-1-2-performance-security-differences https://checksslexpiry.com/blog/tls-1-3-vs-tls-1-2-performance-security-differences Fri, 31 Jan 2025 11:00:00 GMT Security Architecture <![CDATA[What is OCSP Stapling? How to Enable It in Nginx & Apache to Boost HTTPS Speed]]> https://checksslexpiry.com/blog/what-is-ocsp-stapling-and-how-to-enable-it https://checksslexpiry.com/blog/what-is-ocsp-stapling-and-how-to-enable-it Thu, 30 Jan 2025 10:00:00 GMT Guides <![CDATA[How to Setup Free Auto-Renewing SSL Certificates on AWS CloudFront & Route 53 with ACM]]> https://checksslexpiry.com/blog/how-to-setup-ssl-certificate-on-aws-route53-cloudfront https://checksslexpiry.com/blog/how-to-setup-ssl-certificate-on-aws-route53-cloudfront Wed, 29 Jan 2025 14:00:00 GMT Guides <![CDATA[DV vs OV vs EV SSL Certificates: Why Extended Validation (EV) Green Bars Are Dead in 2025]]> https://checksslexpiry.com/blog/difference-between-dv-ov-ev-ssl-certificates https://checksslexpiry.com/blog/difference-between-dv-ov-ev-ssl-certificates Tue, 28 Jan 2025 09:00:00 GMT Security Architecture <![CDATA[How to Build Custom Automated SSL Certificate Monitoring with Bash, Python, and Webhooks]]> https://checksslexpiry.com/blog/how-to-automate-ssl-certificate-monitoring-with-cron-and-api https://checksslexpiry.com/blog/how-to-automate-ssl-certificate-monitoring-with-cron-and-api Mon, 27 Jan 2025 10:00:00 GMT Guides