Certificate Transparency

Anomaly-only certificate alerts

Good Roots Work
#alerting#ct#saas
Feature image

If your monitoring tool emails you for every certificate renewal, you will stop reading the emails. That is how real incidents get missed.

Our notification principle

Good Roots Work should only surface issuance that looks abnormal relative to:

Expected renewals from authorised CAs should not page your on-call.

What this means in practice

Event Typical alert?
Scheduled Let’s Encrypt renewal for www.example.com No
First cert for payments.example.com from a new CA Yes
Cert with SANs outside your usual pattern Yes
Issuance from a CA not permitted by CAA Yes

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