Guides

Short, sourced from Cloudflare’s own documentation, written for the moment you need them.

If you got the error

• What a Ray ID isand why the site owner wants it

If you run a site behind Cloudflare

• Never see 522 againallow Cloudflare’s IPs at the origin, keep-alive on, a correct record
• SSL mode Full (strict) without breaking thingsorigin certificates, and what causes 525 and 526
• Avoid 524 on slow pagesthe 100-second rule and how to design around it
• Rate limits that don’t hit real peoplekeys, thresholds, and challenge versus block
• Cache Rules for HTMLwhen it is safe, and how to purge