SSL Certificate Monitoring

How SSL Monitoring Works

Every time StatusDude performs an HTTP check on an HTTPS endpoint, it captures the SSL certificate details during the TLS handshake. This includes the certificate's expiry date, issuer, subject, and chain information. The data is stored alongside the check result for historical reference.

StatusDude uses a custom SSL-capturing connector that extracts certificate information at connection creation time, before the HTTP library can release the connection. This ensures reliable SSL data extraction even for small, fast responses where connection reuse might otherwise prevent access to the raw socket.

When a certificate's expiry date falls within the alert threshold, StatusDude triggers a notification through your configured channels. The default alert window is typically 14 days before expiry, giving you ample time to renew.

Why SSL Certificates Expire

SSL/TLS certificates have a limited validity period, typically 90 days for Let's Encrypt or 1 year for commercial certificates. Certificate authorities enforce these limits to ensure that domain ownership is periodically re-verified and that newer, more secure cryptographic standards are adopted.

While many teams use auto-renewal tools like certbot, things can and do go wrong. DNS changes, server migrations, load balancer updates, or misconfigured automation can silently break the renewal process. Without monitoring, the first sign of trouble is often your users seeing browser security warnings.

Common SSL Issues StatusDude Detects

Beyond simple expiry, SSL monitoring helps you catch a range of certificate-related problems:

• Certificate expired or about to expire
• Certificate issued for the wrong domain
• Incomplete certificate chain (missing intermediate certificates)
• Self-signed certificates in production
• Mixed content warnings on HTTPS pages
• Weak cipher suites or outdated TLS versions

Integration with Uptime Monitoring

SSL monitoring in StatusDude isn't a separate product — it's integrated directly into your uptime monitoring workflow. The same monitors that check your endpoints for availability also track SSL certificate health. This means you get a unified view of your service's health: uptime, response time, and SSL status all in one dashboard.

When you set up an HTTP monitor for an HTTPS endpoint, SSL monitoring activates automatically. Certificate expiry dates appear on the monitor's detail page, and expiry alerts flow through the same notification channels you've already configured.