Description:
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The server at 10.2.0.1 has a certificate with CN set to the hostname and subjectAltNames set to the hostname and also IP-Address:

X509v3 Subject Alternative Name: 
                DNS:hostname.fqdn, DNS:hostname, IP Address:10.2.0.1

The certificate is correct, the import into the local trusted CA store worked:

$ curl https://10.2.0.1/some/file.html
Hi!

The php script below, however, prints the following error message:

Peer certificate CN=`hostname' did not match expected CN=`10.2.0.1'

It works if I replace "10.2.0.1" by "hostname" or "hostname.fqdn".

Test script:
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<?php
file_get_contents("https://10.2.0.1/some/file.html");
?>