Here’s a breakdown of what that means and what options exist — keeping in mind ethical and policy considerations. Cisco Umbrella works at the DNS level (and can also proxy traffic). When you try to visit a blocked site, Umbrella returns a different IP address — usually a block page — instead of the real site’s IP.
It sounds like you're looking for ways to that is restricted by Cisco Umbrella (formerly OpenDNS). cisco umbrella unblock