From 3b4d1cd2595cc2d76c38d5e2dbec6318655b90d8 Mon Sep 17 00:00:00 2001 From: Andrew Berglund Date: Mon, 18 May 2026 18:25:22 -0500 Subject: [PATCH 1/3] [Spectrum] Clarify port support and application type independence Note that port choice is independent of the HTTP/HTTPS vs TCP/UDP application type, and acknowledge that a small set of UDP ports are reserved for edge infrastructure. --- src/content/docs/spectrum/reference/configuration-options.mdx | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/content/docs/spectrum/reference/configuration-options.mdx b/src/content/docs/spectrum/reference/configuration-options.mdx index 369fabcfe7e1a59..0de54fa44a83354 100644 --- a/src/content/docs/spectrum/reference/configuration-options.mdx +++ b/src/content/docs/spectrum/reference/configuration-options.mdx @@ -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. A small number of UDP 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 the protocol your origin expects. ## Port ranges From 6e2c5ff16a98297e3e503193bea9cb668724701a Mon Sep 17 00:00:00 2001 From: Andrew Berglund <126615050+aberglund-cf@users.noreply.github.com> Date: Mon, 18 May 2026 20:20:36 -0500 Subject: [PATCH 2/3] Update src/content/docs/spectrum/reference/configuration-options.mdx Co-authored-by: Michelle Torres --- src/content/docs/spectrum/reference/configuration-options.mdx | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/content/docs/spectrum/reference/configuration-options.mdx b/src/content/docs/spectrum/reference/configuration-options.mdx index 0de54fa44a83354..333dab4be2cf209 100644 --- a/src/content/docs/spectrum/reference/configuration-options.mdx +++ b/src/content/docs/spectrum/reference/configuration-options.mdx @@ -42,7 +42,7 @@ Additionally, SMTP servers may perform a DNS lookup to find the MX records for a ## Ports -Cloudflare supports all TCP ports. A small number of UDP 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. +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 the protocol your origin expects. From b74fa4fbf228a663e98f62eb7dc3ade66f84cdfb Mon Sep 17 00:00:00 2001 From: Andrew Berglund <126615050+aberglund-cf@users.noreply.github.com> Date: Mon, 18 May 2026 20:20:45 -0500 Subject: [PATCH 3/3] Update src/content/docs/spectrum/reference/configuration-options.mdx Co-authored-by: Michelle Torres --- src/content/docs/spectrum/reference/configuration-options.mdx | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/content/docs/spectrum/reference/configuration-options.mdx b/src/content/docs/spectrum/reference/configuration-options.mdx index 333dab4be2cf209..2189a6353d9b0b1 100644 --- a/src/content/docs/spectrum/reference/configuration-options.mdx +++ b/src/content/docs/spectrum/reference/configuration-options.mdx @@ -44,7 +44,7 @@ Additionally, SMTP servers may perform a DNS lookup to find the MX records for a 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 the protocol your origin expects. +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