Creating self signed certificate for domain and subdomains - NET::ERR_CERT_COMMON_NAME_INVALID
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
Chrome 58 has dropped support for certificates without Subject Alternative Names.
Moving forward, this might be another reason for you encountering this error.