Causes A Cloudflare Worker script recursively references itself. Fixes Step 1 Ensure your Cloudflare Worker does not access a URL that calls the same Workers script.

Causes The Cloudflare domain was recently activated and there is a delay propagating the domain’s settings to the Cloudflare edge network The Cloudflare domain was created via a Cloudflare partner (e.g., a hosting provider) and the provider’s DNS failed Fixes Step 1 Contact Cloudflare Support with the following details: Your…

Causes The site owner implemented Rate Limiting that affects your visitor traffic Fixes Step 1 If you are a site visitor, contact the site owner to request exclusion of your IP from rate limiting. Step 2 If you are the site owner, review Cloudflare Rate Limiting thresholds and adjust your…

Causes By default, Cloudflare prohibits a DNS CNAME record between domains in different Cloudflare accounts. CNAME records are permitted within a domain (www.example.com CNAME to api.example.com) and across zones within the same user account (www.example.com CNAME to www.example.net). Fixes Step 1 To allow CNAME record resolution, the domain owner of the CNAME…

Causes The hostname sent by the client or browser via Server Name Indication (SNI) does not match the request host header. It is commonly caused by the following: your local browser setting the incorrect SNI host header a network proxying SSL traffic caused a mismatch between SNI and the Host…

Causes A website owner forbids access due to malicious activity detected from the visitor’s computer or network (ip_address), likely cause is virus or malware infection on the visitor’s computer. Fixes Step 1 Update your antivirus software and run a full system scan. Cloudflare can not override the security settings the…

Causes A web request was sent to a Cloudflare IP address for a non-existent Cloudflare domain. The target of the DNS CNAME record does not resolve. A CNAME record in your Cloudflare DNS app requires resolution via a DNS provider that is currently offline. always Online is enabled for a…

Causes The Cloudflare domain resolves to a local or disallowed IP address or an IP address not associated with the domain. Fixes Step 1 Confirm your origin web server IP addresses with NET. Step 2 Log in to your Cloudflare account. Step 3 Update the A records in the Cloudflare…

Causes A client or browser directly accesses a Cloudflare IP address. Fixes Step 1 Browse to the website domain name in your URL instead of the Cloudflare IP address.

Causes Cloudflare staff disabled proxying for the domain due to abuse or terms of service violations. DNS changes have not yet propagated or the site owner’s DNS A records point to Cloudflare IP addresses. Fixes Step 1 If the issue persists beyond 5 minutes, contact Cloudflare Support.