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Werk #17668: check_cert: Consider more error types if self signed certificates are allowed

Component Checks & agents
Title check_cert: Consider more error types if self signed certificates are allowed
Date Oct 8, 2025
Level Trivial Change
Class New Feature
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p36 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

The option Allow self-signed certificates now ignores three certificate errors: X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT, X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN, and X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY. These errors typically occur with self-signed certificates.

As a result, when this option is enabled, Checkmk will no longer report validation errors for these specific cases, allowing users to connect to services using self-signed certificates without issues. No user action is required to benefit from this improvement.

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