Chrome accept self-signed localhost certificate

Question

i did follow all the answers on here and nothing worked for me... nothing at all. I'm on windows 10, using chrome version 54.0.2840.99 m trying to access my QNAP TS-453a on local on a static ip address (10.1.1.1) https://10.1.1.1/cgi-bin/

I tried using imported certificates, self signed, export and import the default one, etc nothing works

Some help would be really really appreciated

Answer 1

Valid as of Chrome v58.0.3029:

1. Visit the site in Chrome.
2. Open Developer Tools (F12)
   • Navigate to Security tab
   • Click "View certificate"
     • Click Details > Copy to file
     • Choose a save location on your local machine
3. Open Chrome settings
   • Toggle "Show Advanced Settings" (bottom of screen)
   • Navigate to HTTPS/SSL > Manage certificates
     • Click "Trusted Root Certification Authorities"
     • Click Import
     • Navigate to the cert you just stored
4. Quit Chrome (Ctrl+Shift+Q) and re-visit your site

NOTE:

Chrome recently (as of 05/15/17) began to require that the cert's subjectAltName parameter be filled. This question received an answer that tells you how to do so.

Answer 2

In general, to troubleshoot this kind of problem, open Developer Tools, go to Security tab, and you will see what Chrome deems wrong with that certificate.

It is likely that it doesn't include a subjectAltName extension, and the solution for adding one is here: https://stackoverflow.com/a/56530824/2873507