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[Spectrum] Clarify port support and application type independence #30907

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[Spectrum] Clarify port support and application type independence #30907

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[Spectrum] Clarify port support and application type independence
aberglund-cf May 18, 2026
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Update src/content/docs/spectrum/reference/configuration-options.mdx
aberglund-cf May 19, 2026
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Update src/content/docs/spectrum/reference/configuration-options.mdx
aberglund-cf May 19, 2026
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4 changes: 3 additions & 1 deletion src/content/docs/spectrum/reference/configuration-options.mdx
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Expand Up @@ -42,7 +42,9 @@ Additionally, SMTP servers may perform a DNS lookup to find the MX records for a

## Ports

Cloudflare supports all TCP ports.
Cloudflare supports all TCP ports. For UDP, a small number of ports are reserved for Cloudflare edge infrastructure and cannot be used; the list is not published and may change over time. If a UDP port you need is rejected when you create or update an application, contact your account team.

The edge port you choose is independent of the [application type](#application-type). An **HTTP/HTTPS** application is not limited to ports 80 and 443, and a **TCP/UDP** application is not limited to common service ports. For example, you can run an HTTPS application on port 8443, or a TCP application on port 2222, regardless of which port your origin listens on.

## Port ranges

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