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

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

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


A workaround is to add the domain names you use as "subjectAltName" (X509v3 Subject Alternative Name). This can be done by changing your OpenSSL configuration (/etc/ssl/openssl.cnf on Linux) and modify the v3_req section to look like this:

[ v3_req ]

# Extensions to add to a certificate request

basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
subjectAltName = @alt_names

[alt_names]
DNS.1 = myserver.net
DNS.2 = sub1.myserver.net

With this in place, not forget to use the -extensions v3_req switch when generating your new certificate. (see also How can I generate a self-signed certificate with SubjectAltName using OpenSSL?)


As Rahul stated, it is a common Chrome and an OSX bug. I was having similar issues in the past. In fact I finally got tired of making the 2 [yes I know it is not many] additional clicks when testing a local site for work.

As for a possible workaround to this issue [using Windows], I would using one of the many self signing certificate utilities available.

Recommended Steps:

  1. Create a Self Signed Cert
  2. Import Certificate into Windows Certificate Manager
  3. Import Certificate in Chrome Certificate Manager
    NOTE: Step 3 will resolve the issue experienced once Google addresses the bug...considering the time in has been stale there is no ETA in the foreseeable future.**

    As much as I prefer to use Chrome for development, I have found myself in Firefox Developer Edition lately. which does not have this issue.

    Hope this helps :)