How does Themerella detect ASP.NET?
Themerella reads public evidence such as x-aspnet-version or x-aspnetmvc-version headers, then reports the match with a confidence level.
Technology
ASP.NET detection
Category: Backend Framework. Themerella detects this technology from public website evidence and shows confidence in the report.
Definition
What is ASP.NET?
ASP.NET is Microsoft’s web application framework for building sites and APIs on .NET, often served by IIS and identifiable through ASP.NET headers and viewstate fields.
Detection evidence
How Themerella detects ASP.NET
- x-aspnet-version or x-aspnetmvc-version headers
- ASP.NET response/header text
- __VIEWSTATE or __EVENTVALIDATION form fields
Report value
Every detected technology should include category, confidence, evidence, and practical risk/context so the result is useful beyond logo recognition.
False-positive boundary
What to verify before acting on ASP.NET evidence
- Headers can be removed or rewritten by IIS, proxies, or CDNs.
- Viewstate-like fields do not prove the whole application stack alone.
Next workflow
- Confirm ASP.NET evidence from headers and form markers.
- Review HTTPS, cookie flags, and security-header findings.
- Use report output to decide whether fingerprinting headers should be hidden.
FAQ
Common questions
Can ASP.NET detection be a false positive?
Yes. Headers can be removed or rewritten by IIS, proxies, or CDNs. Themerella reports detection as public evidence with a confidence level, not a guaranteed inventory.
What category does ASP.NET fall under?
ASP.NET is detected as a Backend Framework technology and grouped with related signals in the Themerella report.
Is the ASP.NET detector free?
Yes. Enter any public website URL, run the scan, and review the technology evidence and confidence before any paid monitoring or API layer.
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