Werk #19185: Use localhost for mk-sql plugin
| Component | Setup | ||
| Title | Use localhost for mk-sql plugin | ||
| Date | Jan 20, 2026 | ||
| Level | Trivial Change | ||
| Class | New Feature | ||
| Compatibility | Compatible - no manual interaction needed | ||
| Checkmk versions & editions |
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The plugin configuration includes a flag named Use localhost for locally detected instances to address connection issues caused by Active Directory domain controllers blocking access to local network addresses.
If your MS SQL instance runs on a local network address that is blocked by such a domain controller, monitoring will fail or produce errors unless you enable this flag. Enabling it forces the plugin to connect via localhost, thereby restoring monitoring functionality.
This flag is disabled by default and should only be enabled in this specific scenario. In all other cases, keeping the flag disabled is recommended. Users must manually enable this option in the plugin configuration to resolve monitoring issues related to these connection blocks.