MSIECrawler
IE-based web crawler
About this crawler
MSIECrawler is a web crawler identified by the regular-expression pattern MSIECrawler in the User-Agent request header. It is categorised as browser-automation. Use the regex above to detect, log, allow, or block MSIECrawler traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
1.1%
Technical details
- Name
- MSIECrawler
- Pattern
MSIECrawler- Tags
- browser-automation
- Reference
- https://www.webrobots.de/bot/msiecrawler/
- Added
- 2026/05/03
- Instances
- 4 known sample(s)
Sample User-Agent strings
Mozilla/4.0 (compatible; MSIE 5.01; Windows 95; MSIECrawler)
Mozilla/4.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/4.0; FDM; MSIECrawler; Media Center PC 5.0)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; BTRS100149; SV1; .NET4.0C; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; MSIECrawler)
Mozilla/4.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/4.0; MSIECrawler)
Block this crawler
robots.txt — disallow MSIECrawler:
User-agent: MSIECrawler
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} MSIECrawler [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "MSIECrawler") {
return 403;
}
← back to all crawlers