hello
i have a question about Cloudflare default ports
I want to open a port other than the default ports of Cloudflare, is it possible?
You can find the list of supported ports here: Network ports · Cloudflare Fundamentals docs
If you want Cloudflare to accept another port incoming/on their edge, I don’t think that would be possible outside of maybe Cloudflare Spectrum with Enterprise, which wouldn’t be cheap.
If you are talking about changing the port Cloudflare connects to on your origin server, you could use Origin Rules
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I can confirm that Enterprise Spectrum can do it. But as you say, it isn’t cheap.