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Copy file name to clipboardExpand all lines: src/content/docs/fundamentals/reference/policies-compliances/cloudflare-cookies.mdx
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pcx_content_type: reference
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title: Cloudflare Cookies
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---
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import { Render } from"~/components"
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import { Render } from"~/components";
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Cloudflare uses various cookies to maximize network resources, manage traffic, and protect our customers’ sites from malicious traffic.
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Currently Cloudflare only supports Session Affinity in "orange-cloud" (proxied) mode.
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:::
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### \_\_cf\_bm cookie for Cloudflare bot products
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### \_\_cf_bm cookie for Cloudflare bot products
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Cloudflare's [bot products](/bots/) identify and mitigate automated traffic to protect your site from bad bots. Cloudflare places the `__cf_bm` cookie on end-user devices that access customer sites protected by Bot Management or Bot Fight Mode. The `__cf_bm` cookie is necessary for these bot solutions to function properly.
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### cf_clearance cookie for Cloudflare bot products
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The `cf_clearance` cookie is required for [JavaScript detections](/bots/additional-configurations/javascript-detections/). JavaScript detections are stored in the `cf_clearance` cookie.
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### cf\_ob\_info and cf\_use\_ob cookie for Cloudflare Always Online
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### cf_ob_info and cf_use_ob cookie for Cloudflare Always Online
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The `cf_ob_info` cookie provides information on:
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* The HTTP Status Code returned by the origin web server
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* The Ray ID of the original failed request
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* The data center serving the traffic
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- The HTTP Status Code returned by the origin web server
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- The Ray ID of the original failed request
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- The data center serving the traffic
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The `cf_use_ob` cookie informs Cloudflare to fetch the requested resource from the Always Online cache on the designated port. Applicable values are: 0, 80, and 443. The `cf_ob_info` and `cf_use_ob` cookies are persistent cookies that expire after 30 seconds.
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:::caution
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If your website is not [using HTTPS](/ssl/edge-certificates/encrypt-visitor-traffic/), you may experience issues with the [`cf_clearance` cookie](/waf/troubleshooting/samesite-cookie-interaction/#known-issues-with-samesite-and-cf_clearance-cookies).
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:::
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### Access cookies
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To review Access cookies and their behavior, refer to [Access cookies](/cloudflare-one/identity/authorization-cookie/#access-cookies).
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