Learn which network ports Cloudflare proxies by default and how to enable Cloudflare's proxy for additional ports.
By default, Cloudflare proxies traffic destined for the HTTP/HTTPS ports listed below.
HTTP ports supported by Cloudflare:
HTTPS ports supported by Cloudflare:
If traffic for your domain is destined for a different port than listed above, either:
- Add the subdomain as a gray-clouded record via your Cloudflare DNS app, or
- Enable Cloudflare Spectrum.
Block traffic on ports other than 80 and 443 for Pro, Business, and Enterprise domains via WAF rule id 100015: "Anomaly:Port - Non Standard Port (not 80 or 443)".
Ports 80 and 443 are the only ports compatible with:
- HTTP/HTTPS traffic within China data centers for domains that have the China Network enabled,
- Proxying of Cloudflare Apps, and
- Cloudflare Caching.