Server Signature Test
Check whether response headers reveal server or framework version details.
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What Is a Server Signature Test?
Server Signature Test checks whether Server or X-Powered-By response headers expose version-like information such as nginx/1.24.0, Apache/2.4, or PHP/8.4.
What the Tool Checks
| Check | Why It Matters |
|---|---|
| Server | May reveal the web server product and version. |
| X-Powered-By | May reveal framework, runtime, or application platform details. |
| Version-like digits | Digits in these values often indicate exposed version numbers. |
How to Read the Results
If the result is Hidden, no version-like digits were found in Server or X-Powered-By, including when those headers are absent.
If the result is Review, one or both signature headers exposed digits. Consider removing the header or replacing the value with a generic product name.
Hiding server signatures is not a replacement for patching software. It reduces easy fingerprinting while you keep servers, frameworks, and dependencies up to date.
Frequently Asked Questions
A server signature is identifying information exposed in response headers such as Server or X-Powered-By. It may reveal the web server, framework, language runtime, or version.
Version numbers help attackers fingerprint software and look for matching known vulnerabilities. Hiding versions does not patch vulnerabilities, but it reduces easy reconnaissance.
No. Absence of Server and X-Powered-By is treated as a pass because no version-like value is exposed.