SSL Labs
Qualys SSL Labs scanner testing TLS configuration and certificate grades
About this crawler
SSL Labs is a web crawler identified by the regular-expression pattern SSL Labs$ in the User-Agent request header. It is categorised as scanner. Use the regex above to detect, log, allow, or block SSL Labs traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- SSL Labs
- Pattern
SSL Labs$- Tags
- scanner
- Reference
- https://www.qualys.com/solutions/pci-compliance
- Added
- 2026/04/17
- Instances
- 1 known sample(s)
Sample User-Agent strings
SSL Labs
Block this crawler
robots.txt — disallow SSL Labs:
User-agent: SSL Labs
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} SSL Labs$ [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "SSL Labs$") {
return 403;
}
← back to all crawlers