On 23.12.2018 03:47, Salz, Rich via openssl-users wrote:
    >  >. New certificates should only use the subjectAltName extension.

    Are any CAs actually doing that? I thought they all still included 
subject.CN.

Yes, I think commercial CA's still do it.  But that doesn't make my statement 
wrong :)

Apache raises a warning at the following condition

e.g. a virtual Host defines this:

ServerName  www.example.com:443

and the SSL certificate has a CN which does not correspond to
CN=www.example.com, e.g.  CN=example.com

then the warning looks like this

[Fri Dec 07 07:08:19.393876 2018] [ssl:warn] [pid 29746] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name

and fills up the logs

Walter

Attachment: smime.p7s
Description: S/MIME Cryptographic Signature

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