How does Themerella detect Fastly?
Themerella reads public evidence such as server or via headers referencing fastly, then reports the match with a confidence level.
Technology
Fastly detection
Category: Hosting / CDN. Themerella detects this technology from public website evidence and shows confidence in the report.
Definition
What is Fastly?
Fastly is an edge cloud platform and CDN that accelerates and caches website traffic close to users, often sitting in front of an origin server.
Detection evidence
How Themerella detects Fastly
- server or via headers referencing Fastly
- x-served-by response headers
- x-cache and x-cache-hits cache indicators
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 Fastly evidence
- x-served-by can appear in other proxy setups.
- Multi-CDN stacks may require several header signals.
Next workflow
- Verify Fastly edge evidence.
- Check cache behavior, redirects, and security headers.
- Use reports to distinguish CDN issues from origin page issues.
FAQ
Common questions
Can Fastly detection be a false positive?
Yes. x-served-by can appear in other proxy setups. Themerella reports detection as public evidence with a confidence level, not a guaranteed inventory.
What category does Fastly fall under?
Fastly is detected as a Hosting / CDN technology and grouped with related signals in the Themerella report.
Is the Fastly 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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