A FQDN DNS resolution works, but the cURL command fails when the CNAME record points to a wildcard destination

Solution Verified - Updated -

Issue

  • The command curl gives the following error:

    $ curl -k https://custom-name.example.com/
curl: (6) Could not resolve host: custom-name.example.com

  • However, requesting the same address in a browser works.

  • The resolve using dig or nslookup also works.

Environment

  • Red Hat OpenShift Container Platform (RHOCP)
    • 4.x CoreOS nodes
  • Red Hat Enterprise Linux (RHEL)
    • 8.x

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