Cloudflared支持代理的端口-Wood Chen

Network ports compatible with Cloudflare’s proxy

By default, Cloudflare proxies traffic destined for the HTTP/HTTPS ports listed below.

HTTP ports supported by Cloudflare

80
8080
8880
2052
2082
2086
2095

HTTPS ports supported by Cloudflare

443
2053
2083
2087
2096
8443

Ports supported by Cloudflare, but with caching disabled

2052
2053
2082
2083
2086
2087
2095
2096
8880
8443

Enterprise customers that want to enable caching on these ports can do so by creating a cache rule.

How to enable Cloudflare’s proxy for additional ports

If traffic for your domain is destined for a different port than the ones listed above, for example you have an SSH server that listens for incoming connections on port 22, either:

Change your subdomain to be gray-clouded, via your Cloudflare DNS app, to bypass the Cloudflare network and connect directly to your origin.
Configure a Spectrum application for the hostname running the server. Spectrum supports all ports. Spectrum for all TCP and UDP ports is only available on the Enterprise plan. If you would like to know more about Cloudflare plans, please reach out to your Cloudflare account team.

How to block traffic on additional ports

Block traffic on ports other than 80 and 443 in Cloudflare paid plans by doing one of the following:

If you are using WAF managed rules (previous version), enable rule ID 100015 (Anomaly:Port - Non Standard Port (not 80 or 443)).
If you are using the new Cloudflare Web Application Firewall (WAF), enable rule ID <span class="ruleID" title="Click to copy the full ID">...664ed6fe <svg fill="currentcolor" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" class="icon-copy"><path d="M14 1.5H6l-.5.5v2.5h1v-2h7v7h-2v1H14l.5-.5V2l-.5-.5z"></path><path d="M2 5.5l-.5.5v8l.5.5h8l.5-.5V6l-.5-.5H2zm7.5 8h-7v-7h7v7z"></path></svg></span> (Anomaly:Port - Non Standard Port (not 80 or 443)), which is disabled by default. This rule is part of the Cloudflare Managed Ruleset.

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, and
Proxying of Cloudflare AppsOpen external link

Due to the nature of Cloudflare’s Anycast network, ports other than 80 and 443 will be open so that Cloudflare can serve traffic for other customers on these ports. Tools like Netcat will report these non-standard HTTP ports as open.

The WAF’s Cloudflare Managed Ruleset includes a rule that will block traffic at the application layer (layer 7 in the OSI modelOpen external link), preventing HTTP/HTTPS requests over non-standard ports from reaching the origin server.

Cloudflare Access does not support port numbers in URLs. Port numbers are stripped from requests for URLs protected through Cloudflare Access.