To avoid these errors entirely, install the Cisco Umbrella Root CA in your browser, or the browsers of your users (if you're a network admin). Although the error is expected, the messages displayed can be confusing and annoying and you may wish to stop them from appearing. Typical errors include "The security certificate presented by this website was not issued by a trusted certificate authority" (Internet Explorer), "The site's security certificate is not trusted!" (Google Chrome) or "This Connection is Untrusted" (Mozilla Firefox). If the Cisco Umbrella Root CA is not trusted by your browser, an error may be displayed. The certificate will match the requested site but will be signed by the Cisco Umbrella Root Certificate Authority (CA) or the Cisco Umbrella Root Certificate Authority. OpenDNS’s Block Page and Block Page Bypass feature presents an SSL certificate to browsers that make connections to HTTPS sites. In order to avoid certificate errors when accessing the block page, you must install the Cisco Umbrella Root CA in your browser, or if you have a network of computers, in your users' browsers. This block page is encrypted with a certificate signed by the Cisco Umbrella Root CA. When HTTPS enabled domains are blocked by a policy, Umbrella presents a block page to you which is also served over HTTPS.
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