Secure Access DNS, Web, and Block Pages
Required by applications or devices connecting to the Secure Access DNS-layer security, including Cisco Secure Client deployments with the Umbrella Roaming Security module (DNS-layer security).
We recommend that you allow all traffic on ports 80 and 443 over TCP for the Secure Access DNS-layer, internet security, and Block Page services.
| IP | Ports/Protocol |
|---|---|
| 67.215.64.0/19 | 80/443 TCP |
| 146.112.0.0/16 | 80/443 TCP |
| 155.190.0.0/16 | 80/443 TCP |
| 185.60.84.0/22 | 80/443 TCP |
| 204.194.232.0/21 | 80/443 TCP |
| 208.67.216.0/21 | 80/443 TCP |
| 208.69.32.0/21 | 80/443 TCP |