Certificate not secure on subdomain?

Help
1

hello i've created this
https://testjenkins.smartit.it/

and used certificate for smartit.it but is not ssl secure why ?

certificato_novalido
certificato_novalido801×764 48.5 KB

2

Because the subdomain isn't included in the certificate?

3

hello but not exists 1 certificate for all subdomain?

4

Your certificate only covers smartit.it. Why would you think it would be valid for any other name?

5

No.
Only the names on the cert will be matched.

And right now that is just the one name:

image
image419×522 11.3 KB

Even the WWW redirection is a fail:

image
image813×54 5.38 KB

curl -Iki http://www.smartit.it
HTTP/1.1 301 Moved Permanently
Date: Mon, 18 Jan 2021 00:34:48 GMT
Server: Apache/2.4.25 (Debian)
Location: https://www.smartit.it/
Content-Type: text/html; charset=iso-8859-1

Of course, you seem to be cornered into having to use the WWW address:

Name:      smartit.it
Addresses: 62.149.128.163
           62.149.128.166
           62.149.128.151
           62.149.128.154
           62.149.128.157
           62.149.128.160

Name:    www.smartit.it
Address: 54.74.176.126