ssl - Creating self signed certificate for domain and subdomains - NET::ERR_CERT_COMMON_NAME_INVALID

Question

I followed this tutorial for creating Signed SSL certificates on Windows for development purposes, and it worked great for one of my domains(I'm using hosts file to simulate dns). Then I figured that I have a lot of subdomains, and that would be a pain in the ass to create a certificate for each of them. So I tried creating a certificate using wildcard in Common field as suggested in some of the answers at serverfault. Like this:

Common Name: *.myserver.net/CN=myserver.net

However, after importing this certificate into Trusted Root Certification Authority, I'm getting NET::ERR_CERT_COMMON_NAME_INVALID error in Chrome, for main domain and all of its subodmains, for example: https://sub1.myserver.net and https://myserver.net.

This server could not prove that it is myserver.net; its security certificate is from *.myserver.net/CN=myserver.net.

This may be caused by a misconfiguration or an attacker intercepting your connection.

Is there something wrong in Common Name field that is causing this error?

Answer 1

Chrome 58 has dropped support for certificates without Subject Alternative Names.

Moving forward, this might be another reason for you encountering this error.