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cf_use_ob
The cookie cf_use_ob informs Cloudflare to retrieve the requested resource from the Always Online cache on the specified port. Valid values are: 0, 80, and 443. The cookies cf_ob_info and cf_use_ob are persistent cookies that expire after 30 seconds.
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__cfwaitingroom
The cookie __cfwaitingroom is used solely to monitor visitors accessing a hosting and route combination that has been enabled for a waiting room for a zone. Visitors using a browser that does not accept cookies cannot visit the hosting and route combination while the waiting room is active.
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cf_chl_rc_i
These cookies are intended for internal use and allow Cloudflare to identify production issues for customers.
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cf_chl_rc_ni
These cookies are intended for internal use and allow Cloudflare to identify production issues for customers.
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cf_chl_rc_m
These cookies are intended for internal use and allow Cloudflare to identify production issues for customers.
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__cfruid
Used by the content network, Cloudflare, to identify trustworthy online traffic.
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__cf_bm
Cloudflare's bot products recognise and mitigate automated traffic to protect your website from malicious bots. Cloudflare places the cookie __cf_bm on the devices of End Users accessing customer websites protected by Bot Management or Bot Fighting Mode. The __cf_bm cookie is essential for the proper functioning of these bot solutions.
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__cflb
When session affinity is enabled with the Cloudflare Load Balancer, Cloudflare sets a cookie __cflb with a unique value in the first response to the requesting client. Cloudflare routes future requests to the same origin, optimising the use of network resources. In the event of a failure, Cloudflare sets a new __cflb cookie to direct future requests to the backup pool.
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_cfuvid
The cookie _cfuvid is set only when a website uses this option in a Rate Limiting Rule and is used solely to allow the Cloudflare WAF to distinguish individual users sharing the same IP address.
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cf_clearance
If a CAPTCHA or Javascript challenge has been solved.
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__cfseq
Sequence rules use cookies to track the order of requests submitted by a user and the time between requests, making them available through Cloudflare Rules. This allows you to write rules that match valid or invalid sequences. The specific cookies used for validating sequences are called sequence cookies.
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cf_ob_info
The cookie cf_ob_info provides information regarding: The HTTP Status Code returned by the origin web server. The Ray ID of the original failed request. The data centre serving the traffic.
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