Cisco Umbrella: Bypass

Umbrella blocks domains, not necessarily IPs. If you know the IP of a blocked service:

He typed: [Malicious_IP_Address] c2.apex-logistics-update.com cisco umbrella bypass

Access granted.

Requires knowing correct IP and IP-based routing not blocked. Umbrella blocks domains, not necessarily IPs

For legitimate access to blocked content, administrators can use the Cisco Umbrella Dashboard to: Umbrella blocks domains

"Good catch," Lennox nodded. "We use IP forwarding. We route traffic through a clean front-end domain. Domain Fronting. We’ll connect to a legitimate, high-reputation CDN—something like Cloudfront or Azure. Umbrella sees a connection to a trusted Amazon IP. But inside that encrypted tunnel, we tell the server to forward us to the Romanian box."