Allow Non-issued Security Certificate for Localhost Via Group Policy

Question

I have an application at https://localhost:4321

When using Internet Explorer 8 I'm greated with a "There is a problem with this website's security certificate" message with the big red X etc...

Two options are presented: Click here to close the webpage, and Continue to this website (not reccommened)

Of course I want to continue to this website so I click that, and it goes to the webpage.

I want to get rid of this screen via group policy I have tried adding it to the intranet zone (via GPO), however this problem still persists. Any ideas?

EDIT: Sorry I do want it to trust on every computer in the domain so it has to be run through GPJ, I'm just not sure how best to do it.

Answer 1

Do you want to trust it on every computer in the domain, or just the one that you're working on?

Since it's localhost and all, it doesn't seem to make a lot of sense to do it through GPO - other nodes accessing this one would just have a name mismatch access a cert with a subject name of localhost, anyway.

So - if you want to use Group Policy to trust the cert, you certainly could.. but this might be easier. Export the cert to a file from IE, then open it up. There'll be an "Install Certificate" button - hit that, run through the wizard, and the cert will be permanently installed in your trusted certificates store (which you can verify in certmgr.msc).