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