BingPreview
Bing preview web crawler bot
About this crawler
BingPreview is a web crawler identified by the regular-expression pattern BingPreview\/ in the User-Agent request header. It is categorised as social-preview. Use the regex above to detect, log, allow, or block BingPreview traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.20%
Technical details
- Name
- BingPreview
- Pattern
BingPreview\/- Tags
- social-preview
- Reference
- https://www.bing.com/webmasters/help/which-crawlers-does-bing-use-8c184ec0
- Added
- 2017/04/23
- rDNS suffixes
.search.msn.com- Instances
- 5 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely BingPreview with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.
.search.msn.com
Sample User-Agent strings
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534+ (KHTML, like Gecko) BingPreview/1.0b
Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0; BingPreview/1.0b) like Gecko
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0; WOW64; Trident/6.0; BingPreview/1.0b)
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; WOW64; Trident/5.0; BingPreview/1.0b)
Mozilla/5.0 (iPhone; CPU iPhone OS 7_0 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53 BingPreview/1.0b
Block this crawler
robots.txt — disallow BingPreview:
User-agent: BingPreview
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} BingPreview\/ [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "BingPreview\\/") {
return 403;
}
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