subjectAltName in Let's Encrypt

[Alez-ITA]

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My domain is: alessandroz.pro

I ran this command:

It produced this output: Unfortunately, your CSR /root/muststaple/alessandroz.csr needs to have a SubjectAltName for every domain

My operating system is (include version): Ubuntu 16.04

My web server is (include version): Nginx 1.11.8

My hosting provider, if applicable, is: OVH

I can login to a root shell on my machine (yes or no, or I don’t know): Yes, of course.

I’m using a control panel to manage my site (no, or provide the name and version of the control panel): No.

[schoen]

Hi, what command did you run? How did you create or obtain the file alessandroz.csr?

The Let’s Encrypt CA does expect a subjectAltName for each domain name that will be listed in the cert; you can’t just use the CN field to specify a requested domain.