Explanation

Explanation

Other features are dependent on SSL Decryption functionality, which requires the Cisco Umbrella root

certificate. Having the SSL Decryption feature improves:

Custom URL Blocking—Required to block the HTTPS version of a URL.

…

Umbrella’s Block Page and Block Page Bypass features present an SSL certificate to browsers that make

connections to HTTPS sites. This SSL certificate matches the requested site but will be signed by the Cisco Umbrella certificate authority (CA). If the CA is not trusted by your browser, an error page may be displayed.

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). Although the error page is expected, the message displayed can be confusing and you may wish to prevent it from appearing.

To avoid these error pages, install the Cisco Umbrella root certificate into your browser or the browsers of your users—if you’re a network admin.