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