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Certificate "Not in trust store"

Question asked by Albert Ros on Oct 19, 2015
Latest reply on Feb 10, 2017 by Frank Mandow



SSL Labs finds one of the certificates into my chain as "not trusted" so declares my server certificate not trusted.


cert 4.JPG




FNMT-RCM / AC RAIZ FNMT-RCM appears as self-signed because it's the CA root itself.

On the other hand, Qualys declares "SSL Labs does not maintain its own trust store; instead we use the store maintained by Mozilla." but it seems Mozilla do trust this certificate because it's present on Mozilla Firefox store:

cert 2.JPG

cert 3.JPG

Why SSL Labs doesn't trust this certificate?