Threat Level: green Handler on Duty: Jan Kopriva

SANS ISC: HTTP Header Usage Statistics HTTP Header Usage Statistics


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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
Via
X-Amz-Cf-Pop
X-Amz-Cf-Id
Vary
Server
Cache-Control
Content-Length
X-Cache-Lookup
ETag
X-Frame-Options
X-Content-Type-Options
Strict-Transport-Security
Expires
Age
Last-Modified
Link
Accept-Ranges
X-Powered-By
X-XSS-Protection
Content-Security-Policy
X-Edge-Origin-Shield-Skipped
Referrer-Policy
X-Xss-Protection
Pragma
Access-Control-Allow-Origin
X-Download-Options
X-Request-Id
Content-Language
Accept-CH
Access-Control-Allow-Methods
Access-Control-Allow-Headers
X-UA-Compatible
Expect-CT
X-Amz-Version-Id
Content-Security-Policy-Report-Only
X-Permitted-Cross-Domain-Policies
X-DNS-Prefetch-Control
X-Envoy-Upstream-Service-Time
X-Cache-Hits
X-Varnish
CF-Cache-Status
CF-RAY
Access-Control-Allow-Credentials
X-Dns-Prefetch-Control
P3P
X-Amz-Request-Id
X-Amz-Id-2
Report-To
X-Runtime
NEL
X-Served-By
Accept-Ch
Permissions-Policy
X-Cacheable
X-Meli-Trace-Bu
X-D2id
X-Meli-Trace-Platform
X-Request-Device-Id
X-Meli-Trace-Site
X-Dispatcher
X-Vhost
X-Element-Page-Cache
X-Content-Type
X-Generator
Alt-Svc
X-Navigation-Version
X-AspNet-Version
X-Drupal-Cache
Feature-Policy
Status
Server-Timing
X-Drupal-Dynamic-Cache
Access-Control-Max-Age
Accept-Ch-Lifetime
X-Proxy-Cache
X-Server
X-Backend
Access-Control-Expose-Headers
X-Content-Security-Policy
Accept-CH-Lifetime
X-Adblock-Key
Cache-Tag
X-Amz-Server-Side-Encryption
X-Amzn-Trace-Id
X-Varnish-Cache
Xkey
X-Timer
X-Amz-Replication-Status
X-WebKit-CSP
Content-Encoding
X-Amz-Rid
X-Cache-Status
X-AspNetMvc-Version
X-RemovedCookies
X-ProcessESI
X-Cacheable-TTL
Xet-Cookie
Selected-Fe
X-Proxy-Build
X-Timing-Wait
Front
X-T
Apigw-Requestid
X-Page-Speed
X-Hl-Ver
SPRequestDuration
SPRequestGuid
X-MS-InvokeApp
X-SharePointHealthScore
SPIisLatency
Request-Id
X-AH-Environment
X-Backend-Server
AMP-Access-Control-Allow-Source-Origin
X-Iinfo
CloudFront-Viewer-Country
X-Robots-Tag
X-CDN
MicrosoftSharePointTeamServices
X-Via
X-Host
X-Mly-Id
Expect-Staple
Countrycode
X-Clientip
X-SRCache-Key
X-SRCache-Store-Status
X-SRCache-Fetch-Status
X-Device
X-Correlation-Id
Mail-Subject
We-Hiring
Grace
X-Request-Received
X-Viewer-Country
X-Request-Processing-Time
X-Rq
Critical-Ch
X-ProxyCache-Key
X-BYPASS-REASON
X-ProxyCache-Status
X-Mod-Pagespeed
X-Oneagent-Js-Injection
X-Age
X-Ruxit-Js-Agent
X-Amzn-RequestId
X-Amz-Apigw-Id
X-Turbo-Charged-By
X-Ws-Request-Id
X-NODE
X-URL
Surrogate-Control
Timing-Allow-Origin
Expect-Ct
Cf-Edge-Cache
X-Redirect
X-Node
X-Api-Version
X-LiteSpeed-Cache
Cloudfront-Viewer-Country
Fastly-Restarts
Request-Context
X-VC
X-Cache-FS-Status
Protected
X-Vc
X-Azure-Ref
Cf-Apo-Via
X-OneAgent-JS-Injection
X-Server-Powered-By
X-Server-Id
EagleId
X-Provided-By
X-Readtime
X-User
X-Aspnet-Version
X-Ruxit-JS-Agent
X-Cache-Group
X-Cache-Time
X-CST
X-Styx-Req-Id
Content-Location
X-Pantheon-Styx-Hostname
X-Cache-TTL
Allow
X-HW
X-Debug-Info
Liferay-Portal
X-Status
Cf-Railgun
Pinterest-Version
X-Country-Code
X-Pinterest-Rid
Pinterest-Generated-By
Resin-Trace
AKAMAI-GRN
X-Litespeed-Cache
X-Cdn
X-Ua-Device
X-B3-TraceId
X-Template
X-Language
X-UA-Device