Is is up
IsItUp website availability checker
About this crawler
Is is up is a web crawler identified by the regular-expression pattern Is is up\? in the User-Agent request header. It is categorised as monitoring. Use the regex above to detect, log, allow, or block Is is up traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- Is is up
- Pattern
Is is up\?- Tags
- monitoring
- Reference
- http://isitup.org
- Added
- 2026/05/09
- Instances
- 1 known sample(s)
Sample User-Agent strings
Is is up? (+http://isitup.org)
Block this crawler
robots.txt — disallow Is is up:
User-agent: Is is up
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Is is up\? [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Is is up\\?") {
return 403;
}
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