dnswatchdog.iodocs

Expired Certificate

The SSL/TLS certificate has expired.

Severity: Critical

An expired certificate issue as shown in DNS Watchdog, displaying the certificate details and expiry date

What does this mean?

Every SSL/TLS certificate has an expiration date. Once that date passes, the certificate is no longer considered valid. Browsers will show a full-page security warning to visitors, and many will refuse to proceed. API clients and automated systems will typically reject the connection entirely.

Why this is a problem

  • Visitors see a scary "Your connection is not private" warning and leave
  • Automated systems, webhooks, and API integrations will fail
  • Search engines may penalize the site in rankings
  • It signals that the infrastructure is not being actively maintained, which may indicate other security issues

What you should do

  • Renew the certificate immediately through your certificate authority or hosting provider
  • Set up automated certificate renewal using tools like Let's Encrypt with certbot
  • Configure monitoring alerts to notify you well before certificates expire
  • Consider using a managed certificate service (AWS Certificate Manager, Cloudflare, etc.) that handles renewal automatically

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