When coming to our moodle site, firefox users suddenly are getting an "untrusted site" message? How do I update the moodle certificate so the site becomes trusted again?
You need to dig deeper. An "untrusted site" message can mean many things. Does Firefox give a reason the site is "untrusted"? Have you checked the certificate details to make sure the certificate is valid, issued by a known authority and not expired. If you needed to install an intermediate certificate on your server, have you?
Another reason you might get this is if your site has been hacked and is distributing malware. If so, Google will flag your site as "untrusted" and it will be reflected in both Firefox and Chrome. And if that is the case, you first need to clean up the infection, then follow Google's instructions so the re-test your site. And if that's the case, it still make take a couple days for everything to clear up.
But it's hard to say what the problem is without an error message or site url to check...
I'm so new to this, I don't know how to check the certificate. I'd like to start there, if you can tell me how to check it
As with pretty much everything, it depends on the browser. In Firefox, right click on the page, click "View Page Info", click the "Security" tab, click "View Certificate".
And this assumes your site is running https and has a certificate at all.
I tried that but it doesn't show anything about the security certificate. I think there's a certificate somewhere on my moodle server and I'd like to know how to find it and see if it has expired. Any ideas?? I've attached the Firefox browser screen shots. Any help woould be greatly appreciated!!
Firefox Security Options can be set to check for "reported attack sites." If you site has been hacked and then reported via Google as an attack site an excellent way to get a handle on the hack is to run a free security check from www.Sucuri.com. They are an excellent highly reputable company.