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Jetty

http-library Jetty

Jetty web server HTTP client library

About this crawler

Jetty is a web crawler identified by the regular-expression pattern Jetty in the User-Agent request header. It is categorised as http-library. Use the regex above to detect, log, allow, or block Jetty traffic in your web server, CDN edge rules, or robots.txt.

Block-rate · top 25k sites

0.26%
latest snapshot
2026-06-04
matched key: Jetty
2026-05-012026-06-040.43%

Technical details

Name
Jetty
Pattern
Jetty
Tags
http-library
Added
2017/11/02
Instances
1 known sample(s)

Sample User-Agent strings

Jetty/9.3.z-SNAPSHOT

Block this crawler

robots.txt — disallow Jetty:

User-agent: Jetty Disallow: /

Apache .htaccess — return 403:

RewriteEngine On RewriteCond %{HTTP_USER_AGENT} Jetty [NC] RewriteRule .* - [F,L]

Nginx — return 403 inside a server block:

if ($http_user_agent ~* "Jetty") { return 403; }
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