Detect mod_fastcgi

Web server extensions

Mod_fcgid is a high performance alternative to mod_cgi or mod_cgid, which starts a sufficient number instances of the CGI program to handle concurrent requests, and these programs remain running to handle further incoming requests.

Detection looks at response headers across 1 fingerprint rules among the site's public responses.

01

Websites using mod_fastcgi

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02

Signal classes

PluginView evaluates public page signals in these classes when identifying mod_fastcgi. Individual fingerprint rule bodies are proprietary and are not published.

  • Response headers
03

Example public indicators for mod_fastcgi

Illustrative indicators derived from public catalog metadata for mod_fastcgi. A live scan may match additional proprietary rules beyond these examples.

  • server: mod_fastcgi/?
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What a detection means

Establishes
One or more public signals on the scanned page matched a known mod_fastcgi signature (1 rules) at the time of the scan.
Does not establish
A sitewide install of mod_fastcgi, an active vendor contract, exclusive use, or that mod_fastcgi is still in place today.
05

How to check a site for mod_fastcgi

  1. 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest mod_fastcgi signals.
  2. 2. PluginView reads only public responses (response headers) and scores them against the mod_fastcgi signature set (1 rules).
  3. 3. Review the confidence score and text explanation for mod_fastcgi on the results page.
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Commonly implies

A confirmed mod_fastcgi match also implies these technologies are present.

07

FAQ: detecting mod_fastcgi

Can PluginView detect mod_fastcgi without logging in?
Yes. PluginView only reads publicly accessible responses when checking for mod_fastcgi — typically response headers. It does not bypass authentication or paywalls.
What category is mod_fastcgi?
mod_fastcgi is classified under Web server extensions in the PluginView directory.
How many fingerprint rules cover mod_fastcgi?
This reference currently tracks 1 fingerprint rule across response headers. Individual rule bodies are proprietary and are not published.
What public signals suggest a site uses mod_fastcgi?
Illustrative public indicators for mod_fastcgi include server: mod_fastcgi/?. A live scan may match additional proprietary rules beyond these examples.

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