Keeper change history: GovCloud SSO login 403 error - Resolved

Keeper reported a major incident affecting some GovCloud SSO logins with 403 errors, impacting the Admin Console and Web Vault. It started and was resolved at 2023-05-16 02:00 UTC; the recorded duration was 0 min. An overly aggressive WAF rule in Amazon Shield blocked requests; DevOps applied WAF rule policy changes to resolve it.