Threat Level: green Handler on Duty: Xavier Mertens

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
X-Cache
Set-Cookie
Date
Connection
Content-Type
X-Cache-Lookup
Vary
Server
Via
Cache-Control
X-Amz-Cf-Pop
X-Amz-Cf-Id
Content-Length
X-Edge-Origin-Shield-Skipped
X-Frame-Options
X-Content-Type-Options
ETag
Strict-Transport-Security
Expires
X-Powered-By
Link
Last-Modified
Age
Accept-Ranges
Content-Security-Policy
X-Xss-Protection
Accept-CH
Referrer-Policy
Pragma
X-XSS-Protection
Access-Control-Allow-Origin
Expect-CT
CF-RAY
CF-Cache-Status
X-Download-Options
Content-Language
X-Request-Id
Report-To
NEL
Alt-Svc
Access-Control-Allow-Methods
X-DNS-Prefetch-Control
X-UA-Compatible
Access-Control-Allow-Headers
X-Cache-Hits
EagleId
X-Amz-Version-Id
Content-Security-Policy-Report-Only
X-Permitted-Cross-Domain-Policies
X-Varnish
X-Envoy-Upstream-Service-Time
X-Served-By
Access-Control-Allow-Credentials
Accept-CH-Lifetime
P3P
X-Adblock-Key
X-Runtime
X-Amz-Request-Id
X-Amz-Id-2
X-Generator
Permissions-Policy
X-Cacheable
X-Dispatcher
X-Vhost
X-Drupal-Cache
X-Request-Device-Id
X-D2id
X-Meli-Trace-Bu
X-Meli-Trace-Platform
X-Meli-Trace-Site
X-Drupal-Dynamic-Cache
X-Element-Page-Cache
X-Content-Type
X-Navigation-Version
X-AspNet-Version
Feature-Policy
Server-Timing
X-Timer
Access-Control-Max-Age
Status
X-Backend
X-Cache-Status
X-Content-Security-Policy
Access-Control-Expose-Headers
X-Server
X-Dns-Prefetch-Control
X-Iinfo
X-Proxy-Cache
X-Via
X-CDN
Content-Encoding
X-Varnish-Cache
X-Ws-Request-Id
X-Amz-Server-Side-Encryption
X-Amzn-Trace-Id
X-Turbo-Charged-By
Cache-Tag
Xkey
X-WebKit-CSP
X-ProcessESI
X-RemovedCookies
X-Amz-Rid
X-AspNetMvc-Version
Timing-Allow-Origin
Request-Id
SPRequestDuration
SPRequestGuid
X-SharePointHealthScore
SPIisLatency
X-AH-Environment
X-MS-InvokeApp
X-Aspnet-Version
Apigw-Requestid
Expect-Ct
Selected-Fe
X-Timing-Wait
X-Proxy-Build
AMP-Access-Control-Allow-Source-Origin
X-Page-Speed
Cf-Edge-Cache
Front
X-Amz-Replication-Status
X-Cacheable-TTL
X-Node
CloudFront-Viewer-Country
Xet-Cookie
X-Host
X-LiteSpeed-Cache
MicrosoftSharePointTeamServices
X-Robots-Tag
X-Redirect
X-Mly-Id
Grace
X-Mod-Pagespeed
X-SRCache-Fetch-Status
Fastly-Restarts
X-Device
X-SRCache-Store-Status
Expect-Staple
Protected
X-SRCache-Key
X-Correlation-Id
X-OneAgent-JS-Injection
X-Rq
Cf-Apo-Via
Request-Context
X-Provided-By
X-Viewer-Country
X-Clientip
Mail-Subject
We-Hiring
X-Hl-Ver
Countrycode
X-Ruxit-JS-Agent
X-Cache-Group
X-Readtime
X-Pantheon-Styx-Hostname
X-Azure-Ref
X-Backend-Server
X-Styx-Req-Id
X-Age
X-Server-Powered-By
X-CST
X-User
X-Server-Id
X-Cache-Time
X-Cache-TTL
Content-Location
X-Amzn-RequestId
X-Amz-Apigw-Id
X-Ua-Compatible
X-Ruxit-Js-Agent
X-Status
X-HW
Allow
X-Oneagent-Js-Injection
X-Debug-Info
Liferay-Portal
X-T
X-Powered-By-Plesk
X-Trace
X-Country-Code
X-Language
Odigeo-Trace-Id
Cf-Railgun
Resin-Trace
X-Vcl-Version
X-Cdn
X-B3-TraceId
P3p
X-Generated-By
X-Server-ID
X-ID
X-Yottaa-Metrics
Request-ID
X-Yottaa-Optimizations
X-Envoy-Decorator-Operation
X-UA-Device
Pinterest-Version
Pinterest-Generated-By
AKAMAI-GRN
X-Pinterest-Rid
X-Template
X-Akam-SW-Version
MRF-Tech
Mrf-Cache-Status
X-B3-TraceId-Primal