IP address and URLs to Whitelist
Written by Owen Parry
Updated at September 30th, 2025
This article lists the necessary IP addresses, URLs, and ports for CyberFOX DNS Filtering to operate correctly. The following endpoints must be reachable to use the CyberFOX DNS Filtering services.
- Ports 80 and 443 are used for HTTP and HTTPS traffic, as well as DNS over HTTPS traffic.
- Ports 53 and 853 are for DNS and DNS over TLS traffic.
| Site or service | IP Addresses | Ports |
| Management Portal | app.cyberfox.com | 443 TCP |
| DNS Service | *.dns.cyberfox.com | 80,443,853 TCP |
| DNS Forwarding Servers |
166.117.83.181 166.117.241.23 |
53 UDP |
| DNS Anycast IPs |
166.117.75.142 166.117.157.16 |
53 UDP |
| DOH Anycast IPs |
v4 166.117.51.148 166.117.130.22 v6 |
53 UDP 80,443,853 TCP |
| Registration / Update service | msapidns.cyberfox.com | 80,443 TCP |
| Roaming Client Loopback Listener | 127.0.0.1 | 53 UDP |