HTTP Headers Analysis for https://nflow.io

Detected Technologies from Headers

See all in URL Inspect 4

AWS CloudFront

Fastly

GitHub

Varnish

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Missing

Not configured

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Add Strict-Transport-Security header with max-age of at least 1 year
• Add Content-Security-Policy header to prevent XSS attacks
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• Add X-Content-Type-Options: nosniff
• Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
• Consider adding Permissions-Policy to control browser features

Performance Headers

Accept-Ranges

Performance

bytes

Connection

Performance

close

Vary

Performance

Accept-Encoding

accept-ranges: bytes
connection: close
vary: Accept-Encoding

Caching Headers

Age

Caching

0

Cache-Control

Caching

max-age=600

Etag

Caching

"6806283f-2df0"

Expires

Caching

Fri, 15 May 2026 02:36:27 GMT

Last-Modified

Caching

Mon, 21 Apr 2025 11:13:03 GMT

age: 0
cache-control: max-age=600
etag: "6806283f-2df0"
expires: Fri, 15 May 2026 02:36:27 GMT
last-modified: Mon, 21 Apr 2025 11:13:03 GMT

Content Headers

Content-Length

Content

11760

Content-Type

Content

text/html; charset=utf-8

content-length: 11760
content-type: text/html; charset=utf-8

Server Headers

Server

GitHub.com

server: GitHub.com

CORS Headers

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Fri, 15 May 2026 02:26:27 GMT

Via

Other

1.1 varnish, 1.1 e20259e84d7d881ed453b1f0e4f9a4c6.cloudfront.net (CloudFront)

X-Amz-Cf-Id

Other

LsDA6xG9TihLuMgPS4yEELFE3grWMcXWdExfLLMTyRskgwLlI0PzlA==

X-Amz-Cf-Pop

Other

IAD55-P4

X-Cache

Other

Miss from cloudfront

X-Cache-Hits

Other

0

X-Fastly-Request-Id

Other

54601e8d0630d4e410d17fa5d0b6f7bae3dc55e0

X-Github-Request-Id

Other

9938:8FEE9:DD10A:ED8C3:6A068452

X-Proxy-Cache

Other

MISS

X-Served-By

Other

cache-iad-kcgs7200032-IAD

X-Timer

Other

S1778811987.041401,VS0,VE16

date: Fri, 15 May 2026 02:26:27 GMT
via: 1.1 varnish, 1.1 e20259e84d7d881ed453b1f0e4f9a4c6.cloudfront.net (CloudFront)
x-amz-cf-id: LsDA6xG9TihLuMgPS4yEELFE3grWMcXWdExfLLMTyRskgwLlI0PzlA==
x-amz-cf-pop: IAD55-P4
x-cache: Miss from cloudfront
x-cache-hits: 0
x-fastly-request-id: 54601e8d0630d4e410d17fa5d0b6f7bae3dc55e0
x-github-request-id: 9938:8FEE9:DD10A:ED8C3:6A068452
x-proxy-cache: MISS
x-served-by: cache-iad-kcgs7200032-IAD
x-timer: S1778811987.041401,VS0,VE16

Recommendations

Enable compression (gzip/brotli) to improve performance