Few things are as frustrating as clicking a link, only to be greeted by a stark white page with a red warning: “This site is blocked due to content filtering.” If you see this message, your network administrator is using Cisco Umbrella (formerly OpenDNS) to control what users can access.
Here is a breakdown of why this happens, how it works, and what you can do about it. Cisco Umbrella is a cloud-based security platform. Unlike traditional antivirus software that installs on your computer, Umbrella works at the DNS (Domain Name System) level—the "phonebook of the internet." this site is blocked due to content filtering cisco umbrella
If you believe the block is a mistake (a false positive), take a screenshot of the block page and email it to your helpdesk. They can usually unblock the site in less than a minute. Few things are as frustrating as clicking a