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Seeing 'failed to validate certificate errors' in Self Managed Flex Gateway Logs for Ingest Endpoint

Publish Date: May 19, 2026
Description

The customer is experiencing 'failed to validate certificate' errors in their Flex Gateway logs for the ingest endpoint. This issue arises because their proxy is performing certificate inspection, causing connectivity issues.

Resolution

Ensure that SSL passthrough is enabled for the required endpoint:

US Control Plane:

us1.ingest.mulesoft.com:8443

EU Control Plane:

eu1.ingest.mulesoft.com:8443

Knowledge Article Number

005384620

 
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Salesforce Help | Article