HTTP Headers Analysis for https://www.posit.co

Detected Technologies from Headers

See all in URL Inspect 4

AWS CloudFront

Drupal

Nginx

Varnish

HTTP Security Headers

Status

Strict-Transport-Security

Excellent

max-age=31622400; includeSubDomains; preload

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Add Content-Security-Policy header to prevent XSS attacks
• 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

30

Cache-Control

Caching

max-age=60, must-revalidate, public, s-maxage=300, stale-if-error=3600, stale-while-revalidate=60

Etag

Caching

W/"1785790112-gzip"

Expires

Caching

Sun, 19 Nov 1978 05:00:00 GMT

Last-Modified

Caching

Mon, 03 Aug 2026 20:48:32 GMT

age: 30
cache-control: max-age=60, must-revalidate, public, s-maxage=300, stale-if-error=3600, stale-while-revalidate=60
etag: W/"1785790112-gzip"
expires: Sun, 19 Nov 1978 05:00:00 GMT
last-modified: Mon, 03 Aug 2026 20:48:32 GMT

Content Headers

Content-Language

Content

en

Content-Length

Content

302766

Content-Type

Content

text/html; charset=UTF-8

content-language: en
content-length: 302766
content-type: text/html; charset=UTF-8

Server Headers

Server

nginx

server: nginx

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Date

Other

Mon, 03 Aug 2026 20:49:08 GMT

Via

Other

varnish, 1.1 491eed8806756bcb1c9eb958ecf7ed5a.cloudfront.net (CloudFront)

X-Ah-Environment

Other

prod

X-Amz-Cf-Id

Other

VXbfzwISIoVyjTi98_UmCb00oGDbg70r93_P5932Kd1bHkWvPP0lPw==

X-Amz-Cf-Pop

Other

IAD55-P9

X-Cache

Other

Hit from cloudfront

X-Cache-Hits

Other

9

X-Drupal-Dynamic-Cache

Other

MISS

X-Generator

Other

Drupal 11 (https://www.drupal.org)

X-Request-Id

Other

v-b0939662-8f7c-11f1-8996-132424a94da2

alt-svc: h3=":443"; ma=86400
date: Mon, 03 Aug 2026 20:49:08 GMT
via: varnish, 1.1 491eed8806756bcb1c9eb958ecf7ed5a.cloudfront.net (CloudFront)
x-ah-environment: prod
x-amz-cf-id: VXbfzwISIoVyjTi98_UmCb00oGDbg70r93_P5932Kd1bHkWvPP0lPw==
x-amz-cf-pop: IAD55-P9
x-cache: Hit from cloudfront
x-cache-hits: 9
x-drupal-dynamic-cache: MISS
x-generator: Drupal 11 (https://www.drupal.org)
x-request-id: v-b0939662-8f7c-11f1-8996-132424a94da2

Recommendations

Enable compression (gzip/brotli) to improve performance