Blog · Topic hub
SSL and DNS
Expiration alerts, hostname mismatches, and the difference between a valid certificate and a working TLS connection.
2 published guides · Pillar planned: SSL Certificate Monitoring for Small Software Teams
Published guides
How Early Should You Alert on Certificate Expiration?
Alert on TLS certificate expiration with enough lead time to renew, validate, and deploy without waking people at 2 a.m. for a thirty-day warning.
Why a Valid Certificate Can Still Fail
A certificate can be unexpired and still break TLS for customers. Hostname mismatch, incomplete chain, and stale DNS cause outages monitoring must catch.
Coming next
- TLS Certificate Versus SSL Certificate
- DNS Resolution Failures Explained
- CNAME Verification for Status Pages
- How Managed TLS Works
- Certificate Hostname Mismatch
- Monitoring Certificate Renewal