I
istellabot
Istella search bot
About this crawler
istellabot is a web crawler identified by the regular-expression pattern istellabot in the User-Agent request header. It is categorised as search-engine. Use the regex above to detect, log, allow, or block istellabot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.65%
Technical details
- Name
- istellabot
- Pattern
istellabot- Tags
- search-engine
- Added
- 2026/05/09
- Instances
- 1 known sample(s)
Sample User-Agent strings
istellabot/t.1
Block this crawler
robots.txt — disallow istellabot:
User-agent: istellabot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} istellabot [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "istellabot") {
return 403;
}
← back to all crawlers