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