How to use wildcard DNS in Cert Manager?


  • Hi,

    I would like to create a wildcard SSL certificate using my internal CA on pfSense.
    For this, I entered the wildcard domain as alternative name as followed:

    DNS –> *.example.com

    Unfortunately the following error appears:
    "DNS subjectAltName values must be valid hostnames or FQDNs"

    Note, that one cannot use the common name field for wildcard domains.

    Is this something planned for future update of the webGui? Any other way to easily create such a certificate with my internal pfSense CA?

    Cheers,
    Julian


  • You can export CA cert and private key and use them to create your wildcard cert, which you can just import back (along with private key) to CertMgr. Probably you can do all this on pfSense box using built-in OpenSSL.