[Errors] Update 4xx-client-error.mdx #18887
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ngayerie
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shanecloudflare,
zeinjaber,
TracyCloudflare and
a team
as code owners
Deploying cloudflare-docs with
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dom-cf
reviewed
Dec 20, 2024
| Cloudflare will serve 403 responses if the request violated either a default WAF managed rule enabled for all orange-clouded Cloudflare domains or a WAF managed rule enabled for that particular zone. Read more at [WAF Managed Rules](/waf/managed-rules/). | ||
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| If you're seeing a 403 response that contains Cloudflare branding in the response body, this is the HTTP response code returned along with many of our security features: | ||
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| * [WAF Custom or Managed Rules](/waf/) with the challenge or block action | ||
| * [Security Level](/waf/tools/security-level/), that is set to Medium by default | ||
| * [DDoS Protection](/ddos-protection/), that is enabled by default on zones onboarded to Cloudflare, IP applications onboarded to Spectrum, and IP Prefixes onboarded to Magic Transit | ||
| * Most [1xxx Cloudflare error codes](/support/troubleshooting/cloudflare-errors/troubleshooting-cloudflare-1xxx-errors/) | ||
| * The [Browser Integrity Check](/waf/tools/browser-integrity-check/) | ||
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Suggested change
| * [Validation Checks](/waf/analytics/security-events/additional-information/) | |
| * Most [1xxx Cloudflare error codes](/support/troubleshooting/cloudflare-errors/troubleshooting-cloudflare-1xxx-errors/) | ||
| * The [Browser Integrity Check](/waf/tools/browser-integrity-check/) | ||
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| Cloudflare will also served blank 403 error pages in the following 2 cases. There errors are not logged as they occur early in Cloudflare's infrastructure before the configuration for domains has been loaded. |
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Suggested change
| Cloudflare will also served blank 403 error pages in the following 2 cases. There errors are not logged as they occur early in Cloudflare's infrastructure before the configuration for domains has been loaded. | |
| Cloudflare will also serve an unstyled 403 error page in the following case. There errors are not logged as they occur early in Cloudflare's infrastructure before the configuration for domains has been loaded. |
| Cloudflare will also served blank 403 error pages in the following 2 cases. There errors are not logged as they occur early in Cloudflare's infrastructure before the configuration for domains has been loaded. | ||
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| * [SNI](https://www.cloudflare.com/learning/ssl/what-is-sni/) mismatch: an error 403 is returned if there is a mismatch caused by the client sending a different host to the SNI | ||
| * [Validation Checks](/waf/analytics/security-events/additional-information/) |
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Suggested change
| * [Validation Checks](/waf/analytics/security-events/additional-information/) |
angelampcosta
approved these changes
Dec 20, 2024
| * Most [1xxx Cloudflare error codes](/support/troubleshooting/cloudflare-errors/troubleshooting-cloudflare-1xxx-errors/) | ||
| * The [Browser Integrity Check](/waf/tools/browser-integrity-check/) | ||
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| Cloudflare will also served blank 403 error pages in the following 2 cases. There errors are not logged as they occur early in Cloudflare's infrastructure before the configuration for domains has been loaded. |
There was a problem hiding this comment.
Suggested change
| Cloudflare will also served blank 403 error pages in the following 2 cases. There errors are not logged as they occur early in Cloudflare's infrastructure before the configuration for domains has been loaded. | |
| Cloudflare will also serve blank 403 error pages in the following 2 cases. These errors are not logged, as they occur early in Cloudflare's infrastructure, before the configuration for the domains has been loaded. |
| * Most [1xxx Cloudflare error codes](/support/troubleshooting/cloudflare-errors/troubleshooting-cloudflare-1xxx-errors/) | ||
| * The [Browser Integrity Check](/waf/tools/browser-integrity-check/) | ||
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| Cloudflare will also served blank 403 error pages in the following 2 cases. There errors are not logged as they occur early in Cloudflare's infrastructure before the configuration for domains has been loaded. | ||
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| * [SNI](https://www.cloudflare.com/learning/ssl/what-is-sni/) mismatch: an error 403 is returned if there is a mismatch caused by the client sending a different host to the SNI |
There was a problem hiding this comment.
Suggested change
| * [SNI](https://www.cloudflare.com/learning/ssl/what-is-sni/) mismatch: an error 403 is returned if there is a mismatch caused by the client sending a different host to the SNI | |
| * [SNI](https://www.cloudflare.com/learning/ssl/what-is-sni/) mismatch: a 403 error is returned if there is a mismatch caused by the client sending a different host to the SNI |
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Summary
Updating the 403 documentation to mention SNI mismatch and validation checks, PCX-15123