Summary

The website warns that configuring a CNAME DNS record across Cloudflare accounts is prohibited due to security policy. Users who have manually attempted to use a CNAME record to point to an R2 bucket should switch to utilizing a custom domain instead.

Title

CNAME Cross-User Banned | Cloudflare

Description

CNAME Cross-User Banned | Cloudflare

Keywords

page, website, security, more, details, custom, domain, cookies, error, cross, user, part, network, host, accounts, policy, https

NS Lookup

A 172.67.168.34, A 104.21.46.63

Dates

Created 2026-03-08

Updated 2026-03-15

Summarized None