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[Support] Update configuring-custom-pages-error-and-challenge.mdx #21597

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[Support] Update configuring-custom-pages-error-and-challenge.mdx #21597

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8 changes: 6 additions & 2 deletions ...d-apps/cloudflare-custom-pages/configuring-custom-pages-error-and-challenge.mdx
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Expand Up @@ -108,17 +108,21 @@ After customizing your custom error page, there are two options for adding the p
- Domain level: the custom error page will apply to only one domain associated with your account.

:::note

If Cloudflare cannot load your site or you have blocked the United States (US) via [IP Access rules](/waf/tools/ip-access-rules/) or WAF custom rules, publishing and previewing the error page will not work.

A common error might look like the following: `Error fetching page: Fetch failed, https://example.com/ipcountryblock.html returned 403 (Code: 1202)`. Make sure that you are serving the custom error page with an `HTTP 200` status code, and that no WAF rule is blocking or challenging your custom error page.

:::

:::note
When publishing the custom error page, the system will ignore query strings. This means that if the custom error page URL contains a query string the address published will remove `?` and anything after that (for example, `https://domain.com/5xx.html?removeimages` -> `https://domain.com/5xx.html`).
:::

:::note
The custom error page is only accessed on the origin web server when previewing and publishing the page.
It is then stored on the Cloudflare edge, and served directly from Cloudlfare edge.
No request is made to the origin web server when the custom error page is used.
:::

### Account-level custom error page

To publish an account level custom error page:
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