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
X-Runtime
Report-To
NEL
X-Served-By
Accept-Ch
Permissions-Policy
X-Cacheable
X-Meli-Trace-Bu
X-Meli-Trace-Platform
X-D2id
X-Meli-Trace-Site
X-Request-Device-Id
X-Vhost
X-Dispatcher
X-Content-Type
X-Element-Page-Cache
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
Content-Encoding
X-WebKit-CSP
X-Cache-Status
X-Amz-Rid
X-AspNetMvc-Version
X-ProcessESI
X-RemovedCookies
X-Cacheable-TTL
Xet-Cookie
X-Timing-Wait
Selected-Fe
X-Proxy-Build
Front
Apigw-Requestid
X-T
X-Page-Speed
X-Hl-Ver
SPRequestDuration
X-MS-InvokeApp
X-SharePointHealthScore
X-AH-Environment
SPIisLatency
SPRequestGuid
Request-Id
AMP-Access-Control-Allow-Source-Origin
X-Backend-Server
X-Iinfo
CloudFront-Viewer-Country
X-Robots-Tag
MicrosoftSharePointTeamServices
X-CDN
X-Via
X-Mly-Id
X-Host
Mail-Subject
Expect-Staple
Countrycode
X-Clientip
X-SRCache-Fetch-Status
X-SRCache-Store-Status
We-Hiring
X-Device
X-Correlation-Id
X-SRCache-Key
Grace
X-Request-Processing-Time
X-Viewer-Country
X-Rq
X-Request-Received
Critical-Ch
X-BYPASS-REASON
X-ProxyCache-Key
X-ProxyCache-Status
X-Mod-Pagespeed
X-Oneagent-Js-Injection
X-Ruxit-Js-Agent
X-Age
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-Node
X-Redirect
X-Api-Version
X-LiteSpeed-Cache
Cloudfront-Viewer-Country
Request-Context
X-Cache-FS-Status
X-VC
Fastly-Restarts
Protected
X-OneAgent-JS-Injection
X-Azure-Ref
Cf-Apo-Via
X-Vc
X-Server-Id
X-Server-Powered-By
X-Provided-By
EagleId
X-User
X-Aspnet-Version
X-Readtime
X-Ruxit-JS-Agent
X-Cache-Time
X-CST
X-Cache-Group
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Cache-TTL
Content-Location
Allow
X-HW
X-Status
X-Debug-Info
Liferay-Portal
Cf-Railgun
Resin-Trace
X-Country-Code
Pinterest-Generated-By
X-Pinterest-Rid
Pinterest-Version
AKAMAI-GRN
X-Litespeed-Cache
X-Cdn
X-Ua-Device
X-B3-TraceId
X-Template
X-Language
X-UA-Device