Threat Level: green Handler on Duty: Brad Duncan

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