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[Fundamentals] Update error-520.mdx #25702

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[Fundamentals] Update error-520.mdx
ngayerie Oct 8, 2025
f89d0c1
[Fundamentals] Update connection-limits.mdx
ngayerie Oct 8, 2025
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4 changes: 2 additions & 2 deletions src/content/docs/fundamentals/reference/connection-limits.mdx
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Expand Up @@ -45,11 +45,11 @@ Ensure HTTP keep-alive connections are enabled on your origin. Cloudflare reuses

## Request limits

URLs have a limit of 16 KB. Request headers have a total limit of 32 KB, but each header is limited to 16 KB.
URLs have a limit of 16 KB. Request headers have a total limit of 128 KB, and each header is limited to 128 KB.

## Response limits

Response headers observe a total limit of 32 KB, but each header is limited to 16 KB.
Response headers observe a total limit of 128 KB, and each header is limited to 128 KB.

## Cache limits

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2 changes: 1 addition & 1 deletion ...s/support/troubleshooting/http-status-codes/cloudflare-5xx-errors/error-520.mdx
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Expand Up @@ -14,7 +14,7 @@ This error is often triggered by:

- Origin server crashes or misconfigurations.
- Firewalls or security plugins blocking [Cloudflare IPs](https://www.cloudflare.com/ips) at your origin.
- Headers exceeding 16 KB (often due to excessive cookies).
- Headers exceeding 128 KB (often due to excessive cookies).
- Empty or malformed responses lacking an HTTP status code or response body.
- Missing response headers or origin web server not returning [proper HTTP error responses](https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml).
- Incorrect HTTP/2 configuration at the origin server.
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