CS
Comodo-SSL
Comodo SSL certificate validation spider
About this crawler
Comodo-SSL is a web crawler identified by the regular-expression pattern Comodo[- ](?:SSL|Spider|Certificates) in the User-Agent request header. It is categorised as scanner. Use the regex above to detect, log, allow, or block Comodo-SSL traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- Comodo-SSL
- Pattern
Comodo[- ](?:SSL|Spider|Certificates)- Tags
- scanner
- Added
- 2026/05/09
- Instances
- 4 known sample(s)
Sample User-Agent strings
Comodo SSL Checker
Comodo Spider 1.1
Comodo Spider 1.2
Comodo-Certificates-Spider
Block this crawler
robots.txt — disallow Comodo-SSL:
User-agent: Comodo-SSL
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Comodo[- ](?:SSL|Spider|Certificates) [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Comodo[- ](?:SSL|Spider|Certificates)") {
return 403;
}
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