Unable to open https sites with self signed certificate on IE 10

March 26, 2013 – 1:28 pm

Just ran into a  problem with IE10. I was unable to open a website with https protocol which have not trusted certificate by trusted root authorities.

In previous versions of IE it was possible to open such an page with warning but in IE10 I am only getting this error message without any option to open it instead.

Trigger the following command from the command prompt

certutil -setreg chain\EnableWeakSignatureFlags 8

N ow you will be presented the option to open the page again.

  1. 3 Responses to “Unable to open https sites with self signed certificate on IE 10”

  2. Were you able to open site in IE9? IE9 and above require a minimum 2048 key length. Not sure if this is your problem, but I ran into this with a self cert of 1024. As soon as I reinstalled at 2048, no probs.

    By Nick Wall on Mar 26, 2013

  3. Self-signed certs are IMHO one of today’s curses. It’s highly recommend to use official certificates on public sites. That doesn’t bug users. If the site is internal make at least sure that the certificates are signed by a CA (which needs to be deployed to the clients as trusted) and not only simple certificates without CA. A few lines of OpenSSL are really helpful…

    By René Winkelmeyer on Mar 26, 2013

  4. Man up, buy a cert 🙂
    You can get them at 10$ a pop…. less money than the headache dealing with all this errors. For internal use site, I would second Rene: deploy a CA

    By Stephan H. Wissel on Mar 27, 2013

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