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Clarify the ability of using Custom Rules to act on truncated payloads #19105

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merged 2 commits into from
Jan 10, 2025
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Clarify the ability of using Custom Rules to act on truncated payloads #19105

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Clarify that truncated requests can be actioned via a Custom Rule eve…
Vortexmind Jan 9, 2025
c2a1606
Update src/content/docs/waf/managed-rules/index.mdx
Vortexmind Jan 10, 2025
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2 changes: 2 additions & 0 deletions src/content/docs/waf/managed-rules/index.mdx
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Expand Up @@ -51,3 +51,5 @@ At the zone level, you can only deploy each WAF managed ruleset once. At the [ac
## Important remarks

Cloudflare analyzes the body of incoming requests up to a certain maximum size that varies according to your Cloudflare plan. For Enterprise customers, the maximum body size is 128 KB, while for other plans the limit is lower. This means that the behavior of specific managed rules that analyze request bodies can vary according to your current Cloudflare plan.

If included in your plan, you can use [request body fields](/ruleset-engine/rules-language/fields/http-request-body/) such as `http.request.body.truncated` or `http.request.headers.truncated` in [custom rules](/waf/custom-rules/) that apply appropriate actions to requests that have not been fully analyzed by Cloudflare due to the maximum body size.
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