CloudflareWebScanner is a bot in the search engine crawlers category, operated by Cloudflare.
Cloudflare Web Scanner is a well-behaved crawler that checks domain liveness, content type, robots.txt directives, and other web properties to map the shape of the web.
Search engine crawlers index your pages so they can appear in search results. Keep the genuine ones allowed and verify them, because fake search crawlers are one of the most common disguises for scrapers.
CloudflareWebScanner identifies itself with this user agent string:
CloudflareWebScanner/1.0Anyone can copy a user agent string. Transfon Security also checks where each request comes from, so a request that claims to be a known crawler but comes from the wrong network is treated as a fake, not as the real crawler.
CloudflareWebScanner follows robots.txt, so these rules stop it crawling the paths you choose. robots.txt is a plain text file at the root of your domain, such as https://example.com/robots.txt.
User-agent: CloudflareWebScanner Disallow: /
User-agent: CloudflareWebScanner Disallow: /private/ Disallow: /search
User-agent: CloudflareWebScanner Allow: /blog/ Disallow: /
User-agent: CloudflareWebScanner Allow: / User-agent: * Disallow: /
User-agent: CloudflareWebScanner group, CloudflareWebScanner ignores your User-agent: * rules, so repeat any that should still apply.CloudflareWebScanner from CloudflareWebScanner's user agent; check Cloudflare's own documentation if it publishes a different robots.txt name.Treat robots.txt as a statement of your policy, and enforce it where requests arrive.
CloudflareWebScanner brings search traffic, so keep the real one allowed. Fake CloudflareWebScanner requests are a common cover for scrapers, so verify it by network rather than by name.
Transfon Security for publishersSearch crawlers fetch landing pages to check them. Keep CloudflareWebScanner allowed, but out of campaign and conversion data.
Transfon Security for advertisersCloudflareWebScanner indexes products for search results. Allow it, and block impersonators that use its name to scrape prices.
Transfon Security for e-commerceAllow CloudflareWebScanner on marketing and docs pages, and keep it off signed-in app pages it cannot use.
Transfon Security for SaaS and APIsrobots.txt is a request, not an enforcement. Transfon Security shows CloudflareWebScanner by name in the Top Bots report, so you can see how often it visits and which pages it reads. Block or allow it with a User Agent rule, or slow it down with a rate limit decision rule.
Transfon Security
CloudflareWebScanner is a bot in the search engine crawlers category, operated by Cloudflare. Cloudflare Web Scanner is a well-behaved crawler that checks domain liveness, content type, robots.txt directives, and other web properties to map the shape of the web.
Yes. CloudflareWebScanner follows robots.txt, so a Disallow rule for the CloudflareWebScanner user agent stops it from crawling the paths you list.
Add "User-agent: CloudflareWebScanner" followed by "Disallow: /" to the robots.txt file at the root of your site. To enforce it, block requests whose user agent contains "CloudflareWebScanner" at your WAF. In Transfon Security that is one User Agent block rule.
No. robots.txt is voluntary, so CloudflareWebScanner may not follow it, and anyone can send CloudflareWebScanner's user agent, so a fake CloudflareWebScanner ignores your rule. Enforce the rule where requests arrive, at your WAF, and check the source network.
Search engine crawlers index your pages so they can appear in search results. Keep the genuine ones allowed and verify them, because fake search crawlers are one of the most common disguises for scrapers.
Transfon Security identifies every bot in this directory in your traffic reports, flags fake search crawlers, and lets you allow, block or rate limit each bot.
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