SSL and DNS
Certificate expiration windows, hostname mismatches, and DNS failures that look like downtime.
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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.
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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.