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-RAY
CF-Cache-Status
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
Permissions-Policy
X-Cacheable
X-D2id
X-Meli-Trace-Platform
X-Meli-Trace-Site
X-Meli-Trace-Bu
X-Request-Device-Id
X-Vhost
X-Dispatcher
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
X-Proxy-Cache
Accept-Ch-Lifetime
X-Server
X-Backend
Accept-CH-Lifetime
Access-Control-Expose-Headers
X-Content-Security-Policy
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-ProcessESI
X-RemovedCookies
X-Cacheable-TTL
Xet-Cookie
Selected-Fe
X-Proxy-Build
X-Timing-Wait
Front
Apigw-Requestid
X-T
X-Page-Speed
X-Hl-Ver
X-MS-InvokeApp
SPRequestDuration
SPIisLatency
X-SharePointHealthScore
X-AH-Environment
SPRequestGuid
Request-Id
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
X-Clientip
X-SRCache-Fetch-Status
X-SRCache-Key
X-SRCache-Store-Status
X-Device
X-Correlation-Id
Mail-Subject
We-Hiring
Countrycode
Expect-Staple
Grace
X-Request-Processing-Time
X-Rq
X-Request-Received
X-Viewer-Country
X-Mod-Pagespeed
Critical-Ch
X-ProxyCache-Status
X-BYPASS-REASON
X-ProxyCache-Key
X-Age
X-Ruxit-Js-Agent
X-Amz-Apigw-Id
X-Amzn-RequestId
X-Oneagent-Js-Injection
X-Turbo-Charged-By
X-Ws-Request-Id
X-NODE
X-URL
Surrogate-Control
Timing-Allow-Origin
Expect-Ct
Cf-Edge-Cache
X-LiteSpeed-Cache
X-Node
X-Redirect
X-Api-Version
Cloudfront-Viewer-Country
X-OneAgent-JS-Injection
Request-Context
Fastly-Restarts
Protected
X-VC
X-Cache-FS-Status
X-Vc
X-Azure-Ref
X-Ruxit-JS-Agent
Cf-Apo-Via
X-Server-Powered-By
X-Readtime
X-Server-Id
X-User
X-Provided-By
EagleId
X-Aspnet-Version
X-CST
X-Cache-Time
X-Cache-Group
X-Styx-Req-Id
X-Cache-TTL
X-Pantheon-Styx-Hostname
Content-Location
Allow
X-Debug-Info
X-Status
Liferay-Portal
X-HW
Cf-Railgun
Resin-Trace
X-Pinterest-Rid
X-UA-Device
Pinterest-Version
X-Country-Code
Pinterest-Generated-By
AKAMAI-GRN
X-Cdn
X-B3-TraceId
X-Template
X-Language