Detect mod_rack
Mod_rack is a free web server and application server with support for Ruby, Python and Node.js.
Detection looks at response headers across 2 fingerprint rules among the site's public responses.
01
Websites using mod_rack
Loading website list…
02
Signal classes
PluginView evaluates public page signals in these classes when identifying mod_rack. Individual fingerprint rule bodies are proprietary and are not published.
- Response headers
03
Example public indicators for mod_rack
Illustrative indicators derived from public catalog metadata for mod_rack. A live scan may match additional proprietary rules beyond these examples.
- server: mod_rack/?
- x-powered-by: mod_rack/?
04
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known mod_rack signature (2 rules) at the time of the scan.
- Does not establish
- A sitewide install of mod_rack, an active vendor contract, exclusive use, or that mod_rack is still in place today.
05
How to check a site for mod_rack
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest mod_rack signals.
- 2. PluginView reads only public responses (response headers) and scores them against the mod_rack signature set (2 rules).
- 3. Review the confidence score and text explanation for mod_rack on the results page.
06
Commonly implies
A confirmed mod_rack match also implies these technologies are present.
07
FAQ: detecting mod_rack
- Can PluginView detect mod_rack without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for mod_rack — typically response headers. It does not bypass authentication or paywalls.
- What category is mod_rack?
- mod_rack is classified under Web server extensions in the PluginView directory.
- How many fingerprint rules cover mod_rack?
- This reference currently tracks 2 fingerprint rules across response headers. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses mod_rack?
- Illustrative public indicators for mod_rack include server: mod_rack/?; x-powered-by: mod_rack/?. A live scan may match additional proprietary rules beyond these examples.
