Threat Level: green Handler on Duty: Didier Stevens

SANS ISC: HTTP Header Usage Statistics HTTP Header Usage Statistics


Sign Up for Free!   Forgot Password?
Log In or Sign Up for Free!

This is a continuation of work started by Brough Davis as part of his software security project for his Masters in Information Security Engineering. The main goal of this project is to find how many sites use security relevant headers, like for example the X-XSS-Protection or X-Frame-Options headers.

Below you will find a table/histogram showing how many times we found each header (security relevant or not). We access the index page of each site using a "head" request. The list of sites is derived from Alexa's Top 1 Million sites. We try to poll as many sites as possible each day.

As we collect more data, we will plot changes over time.



All Headers Active In The Past Month
Header Popularity
Set-Cookie
X-Cache
Date
Connection
Content-Type
X-Amz-Cf-Pop
Via
X-Amz-Cf-Id
Vary
Server
Cache-Control
Content-Length
ETag
X-Frame-Options
X-Content-Type-Options
Strict-Transport-Security
Age
Last-Modified
Expires
Accept-Ranges
X-XSS-Protection
Link
X-Powered-By
X-Cache-Lookup
Content-Security-Policy
Referrer-Policy
Access-Control-Allow-Origin
Pragma
X-Download-Options
X-Xss-Protection
X-Request-Id
Content-Language
X-Edge-Origin-Shield-Skipped
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Amz-Version-Id
X-UA-Compatible
X-Permitted-Cross-Domain-Policies
Content-Security-Policy-Report-Only
X-Dns-Prefetch-Control
X-Envoy-Upstream-Service-Time
X-Varnish
X-Amz-Request-Id
X-Amz-Id-2
X-Cache-Hits
X-DNS-Prefetch-Control
Access-Control-Allow-Credentials
P3P
X-Runtime
Expect-CT
X-Cacheable
X-Request-Device-Id
X-Meli-Trace-Bu
X-D2id
X-Meli-Trace-Site
X-Meli-Trace-Platform
X-Served-By
X-Element-Page-Cache
X-Content-Type
X-Dispatcher
X-Vhost
Permissions-Policy
X-Navigation-Version
Accept-CH
X-Generator
X-AspNet-Version
Feature-Policy
Accept-Ch
Accept-Ch-Lifetime
Status
X-Drupal-Cache
Server-Timing
Access-Control-Max-Age
X-Proxy-Cache
X-Drupal-Dynamic-Cache
X-Server
Report-To
Access-Control-Expose-Headers
X-Content-Security-Policy
X-Backend
NEL
Cache-Tag
CF-RAY
CF-Cache-Status
X-Amz-Server-Side-Encryption
X-Amzn-Trace-Id
X-Amz-Replication-Status
X-Varnish-Cache
X-T
X-WebKit-CSP
X-AspNetMvc-Version
Xkey
X-Amz-Rid
X-Cacheable-TTL
Alt-Svc
Content-Encoding
X-RemovedCookies
X-ProcessESI
X-Timer
Xet-Cookie
Selected-Fe
X-Proxy-Build
X-Timing-Wait
Front
X-Request-Processing-Time
X-Request-Received
X-Hl-Ver
Apigw-Requestid
X-Cache-Status
X-Page-Speed
Expect-Ct
X-Backend-Server
Accept-CH-Lifetime
X-BYPASS-REASON
X-ProxyCache-Status
X-ProxyCache-Key
CloudFront-Viewer-Country
AMP-Access-Control-Allow-Source-Origin
X-AH-Environment
We-Hiring
Mail-Subject
Countrycode
X-MS-InvokeApp
X-SharePointHealthScore
Expect-Staple
X-Correlation-Id
X-Robots-Tag
X-SRCache-Store-Status
X-Oneagent-Js-Injection
X-Ruxit-Js-Agent
X-SRCache-Fetch-Status
X-Device
X-SRCache-Key
X-Clientip
SPRequestGuid
Request-Id
SPRequestDuration
SPIisLatency
MicrosoftSharePointTeamServices
Grace
X-Host
X-Mly-Id
Critical-Ch
X-NODE
X-Age
X-Mod-Pagespeed
X-Amzn-RequestId
X-Amz-Apigw-Id
X-Viewer-Country
Surrogate-Control
X-Rq
X-Adblock-Key
X-URL
X-Cache-FS-Status
X-Vc
X-Api-Version
Cloudfront-Viewer-Country
X-VC
X-Via
X-Iinfo
X-Ws-Request-Id
Timing-Allow-Origin
Cf-Edge-Cache
Protected
Request-Context
X-Redirect
X-CDN
X-Turbo-Charged-By
X-Cdn
X-Azure-Ref
X-Node
Cf-Apo-Via
Fastly-Restarts
Edge-Cache-Tag
X-Redis-Cache
X-LiteSpeed-Cache
X-User
X-Server-Powered-By
X-Server-Id
X-Provided-By
X-Readtime
EagleId
X-Litespeed-Cache