BS
Barracuda Sentinel
Barracuda email security scanner
About this crawler
Barracuda Sentinel is a web crawler identified by the regular-expression pattern Barracuda Sentinel in the User-Agent request header. It is categorised as scanner. Use the regex above to detect, log, allow, or block Barracuda Sentinel traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- Barracuda Sentinel
- Pattern
Barracuda Sentinel- Tags
- scanner
- Added
- 2026/05/09
- Instances
- 1 known sample(s)
Sample User-Agent strings
Barracuda Sentinel (EE)
Block this crawler
robots.txt — disallow Barracuda Sentinel:
User-agent: Barracuda Sentinel
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Barracuda Sentinel [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Barracuda Sentinel") {
return 403;
}
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