SSL & DNS Security

Why Do SSL Certificates Still Break Websites in 2025?

Real-world failure modes and how to prevent them.

Published 02 Oct 2025

Despite automation, SSL outages persist. The culprits: missing SANs, broken chains, failed cron, or edge/origin mismatch. Here’s how to prevent them.

  • Monitor days to expiry and chain validity
  • Validate SAN coverage after adding hostnames
  • Test renewal hooks in staging and production

See: SSL Guide · DNS 101 · Feature: SSL Monitoring.

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