Browser Integrity Check
Cloudflare’s Browser Integrity Check (BIC) looks for common HTTP headers abused most commonly by spammers and denies access to your page.
It also challenges visitors without a user agent or with a non-standard user agent such as commonly used by abusive bots, crawlers, or visitors.
BIC is enabled by default.
To disable BIC globally for your zone:
- Log into the Cloudflare dashboard.
- Select your account and zone.
- Go to Security > Settings.
- For Browser Integrity Check, switch the toggle to Off.
To disable BIC selectively, you can set up a firewall skip rule.
Also, use a Configuration Rule to selectively enable or disable this feature for certain sections of your website using a filter expression (such as a matching hostname or request URL path).