R6_CommentReader
Social media comment reader
About this crawler
R6_CommentReader is a web crawler identified by the regular-expression pattern R6_CommentReader in the User-Agent request header. It is categorised as monitoring. Use the regex above to detect, log, allow, or block R6_CommentReader traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- R6_CommentReader
- Pattern
R6_CommentReader- Tags
- monitoring
- Reference
- http://www.radian6.com/crawler
- Added
- 2026/05/03
- Instances
- 1 known sample(s)
Sample User-Agent strings
R6_CommentReader(www.radian6.com/crawler)
Block this crawler
robots.txt — disallow R6_CommentReader:
User-agent: R6_CommentReader
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} R6_CommentReader [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "R6_CommentReader") {
return 403;
}
← back to all crawlers