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
Set-Cookie
Content-Type
Date
Connection
Server
Cache-Control
Vary
Expires
X-Frame-Options
Content-Length
Strict-Transport-Security
X-Content-Type-Options
Last-Modified
CF-RAY
Cf-Request-Id
CF-Cache-Status
Accept-Ranges
Link
Pragma
ETag
Expect-CT
X-Powered-By
X-XSS-Protection
Via
Age
X-Cache
Content-Security-Policy
Access-Control-Allow-Origin
Content-Language
Referrer-Policy
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-Cache-Hits
X-UA-Compatible
Alt-Svc
P3P
X-Served-By
X-Xss-Protection
X-Timer
X-Download-Options
Access-Control-Allow-Headers
X-Varnish
Access-Control-Allow-Methods
X-Request-Id
Access-Control-Allow-Credentials
X-AspNet-Version
X-Adblock-Key
X-Runtime
X-Permitted-Cross-Domain-Policies
X-Request-ID
Content-Security-Policy-Report-Only
X-Drupal-Cache
X-Check
X-Cache-Status
X-Generator
P3p
X-DNS-Prefetch-Control
X-Cacheable
Timing-Allow-Origin
X-Content-Security-Policy
X-Iinfo
X-FRAME-OPTIONS
Status
Content-Encoding
Feature-Policy
X-AspNetMvc-Version
X-CDN
X-Envoy-Upstream-Service-Time
Upgrade
Access-Control-Expose-Headers
X-Drupal-Dynamic-Cache
Access-Control-Max-Age
X-Via
Keep-Alive
X-Dns-Prefetch-Control
X-Ws-Request-Id
Request-Context
Server-Timing
X-Robots-Tag
X-AH-Environment
X-Server
X-Hacker
X-Age
X-Ua-Compatible
X-Turbo-Charged-By
X-Proxy-Cache
X-Server-Powered-By
X-Cache-Group
X-Backend
Host-Header
X-Amz-Request-Id
EagleId
X-Nginx-Cache-Status
X-Amz-Id-2
Report-To
X-LiteSpeed-Cache
X-Rq
X-UA-Device
X-Varnish-Cache
X-Page-Speed
Grace
X-Swift-SaveTime
X-Swift-CacheTime
X-Pingback
Ali-Swift-Global-Savetime
X-Device
EagleEye-TraceId
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Vhost
NEL
X-Amz-Version-Id
Cf-Railgun
X-OneAgent-JS-Injection
X-Host
X-Dispatcher
X-Server-Id
X-CST
Allow
X-Node
X-Cache-Spec
Surrogate-Control
Request-Id
X-Backend-Server
X-Webkit-CSP
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-Readtime
X-Response-Time
X-Akam-SW-Version
Accept-CH
X-WebKit-CSP
Xkey
Accept-Ch-Lifetime
X-HW
X-Country
X-Ac
X-Application-Context
Content-Location
X-Language
X-Ruxit-JS-Agent
X-Template
MS-Author-Via
Rating
X-Cache-Lookup
X-Cloud-Trace-Context
X-Url
X-Mod-Pagespeed
X-B3-TraceId
Edge-Control
X-PC
X-TtlSet
X-Vname
X-Clacks-Overhead
X-ESI
X-MS-InvokeApp
X-Trace
X-Varnish-TTL
Accept-Ch
X-GitHub-Request-Id
X-Content-Type
Fastly-Restarts
X-Origin-Cache
X-Cnection
X-Rack-Cache
X-ASPNET-VERSION
X-D2id
X-Country-Code
X-Kinja-Server
X-Kinja-Build
X-Cdn-Fetch
X-Use-Magma
X-Kinja-Revision
X-Exp-Id
X-Kinja
X-GoogleNews-Bot
X-Exp-Variant
X-VARITI-CCR
Verso
X-Goog-Hash
Arr-Disable-Session-Affinity
X-FastCGI-Cache
X-Server-Name
Accept-CH-Lifetime
X-Vcap-Request-Id
X-Cached
X-Buckets
X-Navigation-Version
Cache-Tag
X-Client-IP
X-Amz-Rid
Service-Worker-Allowed
X-Abt-Application-Version
X-Powered-By-Plesk
X-ORACLE-DMS-ECID
RTSS
X-Fastly-Request-ID
Access-Control-Request-Method
X-Sol
Pagespeed
Response
X-Middleton-Response
X-Middleton-Display
Display
X-MSEdge-Ref
X-Powered-CMS
X-Element-Page-Cache
X-Cache-TTL
Public-Key-Pins
X-NF-Request-ID
X-Dw-Request-Base-Id
X-Ttl
X-Upstream
X-SRCache-Fetch-Status
X-SRCache-Store-Status
X-Version
X-Server-ID
X-Px
X-Edge
S
X-Kinsta-Cache
X-TTL
X-LLID
X-Edge-Location-Klb
MRF-Tech
Mrf-Cache-Status
Realpath
X-B3-TraceId-Primal
X-Accel-Expires
X-ECACHE
SPRequestDuration
SPIisLatency
X-SharePointHealthScore
SPRequestGuid
X-Oneagent-Js-Injection
X-Jurisdiction
X-HP-Webp
X-T
X-Mid
X-MCACHE
X-PressLabs-Stats
X-Content-Security-Policy-Report-Only
X-Kraken-Loop-Name
X-Instrumentation
X-Kraken-Routeconfig-Destination
X-Server-Lifecycle-Phase
X-Forwarded-Proto
X-Shield-Request-Id
X-Correlation-Id
Pinterest-Version
X-Pinterest-Rid
Pinterest-Generated-By
Edge-Cache-Tag
X-Recruiting
Charset
Fastcgi-Cache
X-Amz-Server-Side-Encryption
X-DynaTrace
TP-L2-Cache
TP-Cache
X-Ruxit-Js-Agent
X-ORACLE-DMS-RID
X-Mg-S
X-Content-Digest
Nginx-Cache
X-Cache-Key
X-Id
X-Ezoic-Cdn
Filters
X-Request-Received
X-Request-Processing-Time
X-Release
Front-End-Https
Server-Node
X-Logged-In
Alternate-Protocol
Cache-Tags
X-Forwarded-For
TCN
Content-MD5
X-XRDS-Location
Fusion-Deployment-Id
Fusion-Source
Fusion-Template-Id
Fusion-Content-Source
Fusion-Content-Id
Fusion-Component-Id
X-Amzn-Trace-Id
X-Geo-Country
X-Origin-Upstream-Status
X-Litespeed-Cache
X-Grace
X-Origin-Server
Server-Name
X-Protected-By
X-Www-Served-By
X-Rid
X-F-Cache
Cleartype
X-Amz-Replication-Status
Host
X-Az
X-Activity-Id
X-AppVersion
X-Contextid
X-GUploader-UploadID
X-Goog-Stored-Content-Length
X-Goog-Generation
X-Goog-Storage-Class
X-Goog-Stored-Content-Encoding
X-Hostname
X-Goog-Metageneration
X-HS-Content-Id
X-HS-Hub-Id
X-HS-Cache-Config
X-HS-Combine-CSS
X-RateLimit-Remaining
X-WebKit-CSP-Report-Only
X-Debug-Info
X-LB-Cache
Section-Io-Cache
X-Frontend
X-NWS-LOG-UUID
MicrosoftSharePointTeamServices
X-Erf-Bev-Bev
X-Browser-Type
X-Erf-Bev-Bev-Is-Generated
X-Ser
X-Page-Id
X-Git-Hash
X-Cache-Age
X-VCache
X-Upgrade-Enabled
X-Respond-Thread
X-Content-Options
X-Aspnetmvc-Version
Accept-Charset
X-Daa-Tunnel
X-Hits
X-Source
X-Varnish-Age
X-Tec-Api-Root
X-Tec-Api-Version
X-DIS-Request-ID
X-Tec-Api-Origin
Paypal-Debug-Id
Access-Control-Allow-Method
X-XRDS-LOCATION
X-Mobile-URL
X-Varnish-Backend
ServerID
X-Kong-Upstream-Latency
X-Kong-Proxy-Latency
X-Varnish-Grace
AR-ATIME
AR-CACHE
AR-PoweredBy
AR-Request-ID
X-B-Cache
X-Signature
Ar-Sid
Viewport
X-FB-Debug
X-Flags
X-Aspnet-Duration-Ms
X-Is-Crawler
X-Cache-Action
X-Request-Guid
Payment
Healthy
X-Route-Name
X-Providence-Cookie
X-TT
X-Fastcgi-Cache
X-Whom
X-B3-Sampled
Node
X-AOL-HN
X-CACHE-GROUP
X-App-Environment
X-N
X-Seen-By
Version
X-Type
X-Mobile
X-Load-Cache
Fastcgi-Useragent
DC
DynaTrace
X-Request-Handler-Origin-Region
X-Microsite
MS-CV
X-Yandex-Sdch-Disable
X-Distributor
X-Cache-Expired-At
X-HTML-Minification-Powered-By
SRV
Retry-After
X-Cache-Control
X-Tt-Trace-Tag
X-Tt-Trace-Host
Filterid
X-Ab
Frame-Options
X-User-Agent
X-IPLB-Instance
X-Response-Served-From
X-Original-Request-Id
X-UUID
X-Real-IP
X-Instance
X-Jobs
Refresh
X-Tumblr-Pixel-1
X-Tumblr-User
X-Tumblr-Pixel-0
X-Tumblr-Pixel
X-Varnish-Server
X-ProcessESI
X-IPS-LoggedIn
X-RemovedCookies
X-Proxy
X-Device-Type
X-Debug-IsPreview
X-RTag
X-Region
X-Cluster-Name
X-Proxy-Cache-Status
X-Debug-IsConnected
X-Content-Powered-By
X-Adobe-Content
X-Adobe-Loc
Ms-Operation-Id
Access-Control-Request-Headers
X-Cache-Time
VIX-Pulpo-Upstream-Status
Uber-Trace-Id
NGB
X-B
X-Cacheable-TTL
VIX-Pulpo-Node
X-Page-View
X-Framework
X-G
X-Debug
X-FireWall-Port
X-FW-Server
X-FW-Static
X-FW-Serve
X-FW-Dynamic
X-Vgn-Hpd-Reason
X-FW-Type
X-FW-Hash
X-Zen-Fury
X-Accel-Buffering
X-App-Version
Cache
Countrycode
Section-Io-Origin-Time-Seconds
Section-Io-Origin-Status
X-Time
Section-Origin-Responded
X-Wix-Request-Id
Section-Io-Id
X-RateLimit-Limit
X-NGENIX-Cache
X-CDN-Forward
X-Mg-Request-UUID
X-Azure-Ref
X-Nginx-Cache
Cache-Status
X-Oracle-Dms-Rid
X-Is-Bot
X-Rendered-As
X-Cache-Rule
Surrogate-Key
X-Node-Name
Country
X-Ms-Request-Id
X-Ms-Version
X-Drupal-Cache-Tags
S-Cnection
X-Cache-Hit
Referer-Policy
X-EdgeConnect-Cache-Status
X-App-Server
SD-X-WS
Eomportal-Instance
Liferay-Portal
X-Environment-Context
X-L-Path
Amp-Access-Control-Allow-Source-Origin
X-Cache-Operation
X-TA-CDN-Provider
X-Yottaa-Optimizations
X-Yottaa-Metrics
X-Varnishpool
X-SaId
Selected-Fe
X-Tumblr-Pixel-2
X-JoinUs
Meta-Geo
X-Proxy-Build
X-Timing-Wait
X-UPSTREAM-Address
From-Origin
CF-IPCountry
X-RN-RSRV
X-ES-SERVER
X-Drupal-Cache-Contexts
X-Via-Fastly
X-Cache-Server
X-Backend-Host
Protected
X-Shopify-Stage
X-Sorting-Hat-PodId
X-Sorting-Hat-ShopId
X-ShopId
X-ShardId
X-R9-Blue-Green-Version
X-Storefront-Renderer-Rendered
X-Alternate-Cache-Key
X-Endurance-Cache-Level
X-Varnish-Hostname
X-Cache-TTL-Remaining
X-Pubstack
X-S-Maxage
X-PHP-Backend
X-Varnish-Beresp-Grace
X-Xfnlog-Site
X-TNCMS
X-Loop
X-No-Session
X-Handled-By
X-GG-Cache-Date
X-Request-Time
Fastly-SSL
Azure-InstanceId
Cache-Tv-Group
ServedBy
Property-Id
Azure-Version
Cache-Name
Azure-SiteName
Azure-SlotName
X-AWS-Id
X-LAGOON
X-Human
X-ProxyCache-Key
X-ProxyCache-Status
X-LJ-Flow-ID
X-NYM-Debug-Backend
X-Proto
X-PCL
X-Origin-Hint
X-OCL
X-BYPASS-REASON
X-Be
TWC-Locale-Group
TWC-GeoIP-LatLong
TWC-GeoIP-Country
TWC-Device-Class
TWC-Privacy
Webcakes-App-Name
X-Adobe-Source
Webcakes-Region
Webcakes-App-Version
TWC-Connection-Speed
Azure-RegionName
X-Server-W
X-VWS-Id
Decoy-Debug-Key
X-Origin-Date
Country-Code
X-Section
Decoy-Debug-Status
X-Hl-Ver
X-Backend-Name
X-Format
X-RCS-CacheZone
X-SayCDN-TTL
X-Access
Decoy-Debug-TTL
X-Say-TTL
X-Say-Cacheable
Akamai-GRN
Apigw-Requestid
X-Revision
X-Sql-Count
X-UA-Device-Type
X-Status
X-FB-TRIP-ID
X-PERF
X-Sql-Duration-Ms
X-Labrador-Cache-Channel
Mn-Server-Ip
X-Akamai-Edgescape
Xserver
X-ApacheServer
X-PHP-Host
X-Uri
X-Hosted-By
X-Hyper-Cache
Nel
X-Cache-PHP
X-Redis-Cache
X-Cache-Type
X-Rule
AMP-Access-Control-Allow-Source-Origin
X-Aws-Lambda-Call-Status
X-Web-Node
X-B3-SpanId
X-Ua-Device
X-Trace-Id
X-ATG-Version
X-FW-Version
X-TT-LOGID
X-WA-Info
X-MP-GENERATED-AT
X-ServerID
X-Time-Microsecs
X-Parallel-Accel
X-Content-Age
X-CSRF-Token
X-Tumblr-Pixel-3
X-Cached-By
X-Soup
Count-Hit
X-Dc
X-Cache-Enabled
X-Datadome
Backend
X-Akamai-Transformed
X-Cluster-Node
X-Edge-Location
OT-Force-Account-Verify
X-CS
X-Detected-As
X-Azure-Ref-OriginShield
X-Mode
X-Varnish-Cache-Hits
X-Cache-Host
GEO-INFO
Web-Mar-Node
X-Info
X-Microcachable
Cross-Origin-Opener-Policy
X-Bc-Bl
X-Generation-Time
X-HP-Trace-Id
X-Varnish-Beresp-Status
X-Servername
X-Varnish-Hits
X-Cache-NGX
X-Debug-Cache
X-Amzn-RequestId
X-Amz-Apigw-Id
X-Amzn-Remapped-Content-Length
X-Zipkin-Id
X-Proxied
X-Platform
X-Routing-Service
X-Storage
X-Unique-ID
SID
X-APP-VERSION
X-SRV
X-Extlb
DataCenter
X-Varnish-Beresp-Ttl
Who
X-Origin-CC
X-B3-Traceid
X-Magnolia-Registration
X-Origin-TTL
MD5-Digest
X-S-Cookie
X-ScT
X-Service
X-Session-Fingerprint
S-Rt
X-Ua
M-TraceId
X-Rojux
X-S
X-Locale
X-NAPM-TraceId
Meta-Geo-Continent
X-Air-Source
X-Air-Hostname
X-SRCache-Key
Rendered-Blocks
Req-Svc-Chain
Odigeo-Trace-Id
Mobile-Detection-Method
X-Rewrite-Enabled
X-Location
X-CACHE-KEY
X-Thanos
X-Request-URI
CDN-EdgeStorageId
CDN-PullZone
CDN-CachedAt
CDN-Cache
CDCHOST
CDN-RequestCountryCode
CDN-RequestId
X-Processor
Content-Disposition
DCR-Decision-By
DCR-Processing-Time-Ms
CDN-Uid
Expiry
Cache-Host
X-PBS-Appsvrname
A
X-Ratelimit-Reset
Host-ID
X-PAYTM-SRV-ID
Apple-News-Services-Handled
Apple-News-Services-Host
BehaviorPad-Version
Fastcgi-X-Cache-Version
Fastly-Backend-Name
Apple-News-Services-Request-Url
Apple-News-Services-Parsed-Url
State
X-Air-Trace-Id
X-Cache-NE
X-Cache-Bucket
X-CF-Lambda-Fn
X-CF-Lambda-Version
X-Cms-Context
X-BCube-Filmed-By
X-B-Cookie
X-Aed
X-Aicache-OS
X-Application
X-ARC
X-Connection-Hash
X-NWS-UUID-VERIFY
Server-Info
X-Developer
X-Epic-Correlation-Id
X-External-Request-Id
X-From
X-Destination
X-D
X-Core-Value
X-Geo-Header
X-Generated-On
Ec-Rule-Version
X-A-Wwc
X-Bip
X-A
X-VG-WebCache
Upgrade-Insecure-Requests
X-A-Dam
X-A-Ccd
X-Vdms-Path
X-Vdms-Version
X-VG-WebServer
X-Level-Front-Cache
T-Server
X-Vtex-Processado-Em
X-Vtex-Remote-Cache
Surrogated-Key
X-A-Dcw
X-A-Dgt
Source
X-Cache-Grace
PFcat
X-Developers
X-Envoy-Decorator-Operation
Esi-Enabled
Pagetype
Fastcgi-Cache-TTL
Origin
UCS
X-Is-Gdpr
X-Gamma-Serve
X-Proxy-Upstream
Pics-Label
X-JWT-State
Fastly-SWR
Location
X-Hash
L
Server-Host
X-Backend-State
X-NU-AKA-ACS-Version
X-Origin
X-HN
Kp-EeAlive
X-Branch-Name
Fastly-SIE
X-GoCache-CacheStatus
X-Clientip
Memcached
X-Platform-Server
Gh-Request-Id
X-Cache-Debug
X-Has-Esi
Fastly-Drupal-HTML
Cmstype
X-Served-From
X-Sigma
X-Scheme
X-Cache-Ttl
X-Request-UUID
X-Rocket-Build-Number
Cross-Origin-Window-Policy
X-Sigma-Backend
Path
X-Via-JSL
X-DataDome
X-VG-TLSProxy
X-TrackingId
X-VarnishDD-TTL
X-Rebelmouse-Surrogate-Control
X-Var-Ttl
AKAMAI
Url
CacheControlHeader
Cmsid
X-Rebelmouse-Cache-Control
User-Cache-Control
X-Tb
X-TEC-API-VERSION
X-TEC-API-ROOT
X-AIR-PT
X-TEC-API-ORIGIN
X-Forwarded-Host
X-Generated-In
X-Generated-By
X-WADP-Cache
X-Accel-Expires-Debug
X-Policy
C-Via
X-Date
X-Fmm-Version
Is-Eu
X-Thinkindot-L3
X-Req
Vix-Hermes-Req-Id
Wxu-Next-Commit
Wxu-Next-Hostname
DSUID
Wxu-Next-Region
X-VC-Cache
Cf-Device-Type
X-Cache-Tags
HA-Ipaddr
X-Cache-Info
X-Device-Os
X-EC-Lua
X-Clara-WADP
X-CGP
Thinkindot-Control
Thinkindot-CacheControl-Type
Content-Secure-Policy
X-SVT-ORM-VERSION
X-Fastly-Backend
X-Csrf-Jwt
X-SVT-ORM-RULES
Thinkindot-CacheControl
TDXMobile
NGX
X-Forwarded-Site
X-Micro-Cache
X-Forwarded-Path
NM-Fastcgi-Cache
X-Owner
X-Site-Version
L5d-Success-Class
PB-RID
PB-PID
X-Orig-Expires
X-Fastly-Cache
X-Origin-Expires
X-Shop-Environment
X-Varnish-Ttl
Adler-Geo
Arc-Country
X-Eu-Site
Arc-Version
X-Li-Fabric
X-VHOST
Svr
Platform
Ha-Gx-Prefs
X-Li-Pop
X-Request-Host
True-Client-Country-4JS
X-LI-UUID
X-DPWN-IS-SECURE
X-Loc
X-Sucuri-ID
X-Men
X-Cluster
X-Tenant
X-Amz-Meta-S3cmd-Attrs
X-Variation
X-VServer
X-Gen-Mode
X-Nginx-Cache-Key
X-Skip-Cache
X-User
X-Varnish-Remaining-TTL
X-SIPLIST1
X-Minions-Version
X-Slack-Backend
X-Varnish-CookieHashed-On
X-Varnish-CookieINHashed-On
X-Mvc-Supplant-Cachable
X-Old-Content-Length
X-Qloud-Router
X-RateLimit-Limit-Second
X-RateLimit-Remaining-Second
X-PF-Uncompressing
X-Varnish-Url
X-Irp-Debug
Sever-Int
Server-Hostname
X-Goog-Meta-Goog-Reserved-File-Mtime
X-Fetched-On
X-GeoIP
Server-Ext
Release
X-Hnp-Log
X-Viewer-Country
X-Wikidot-Backend
X-Wikidot-Static-Cache
X-GeoIP-City
X-Gzip
X-Ratelimit-Limit
X-Block-Status
X-Cache-Id
We-Hiring
IsBot
V-Age
Mail-Subject
Locid
X-DefElseHash
Cache-Key
Webserver
NtCoent-Length
X-FC-Vary-Parameters
X-Srv
X-DefHash
X-Esi-Check
CPC-Age
VNS-Age
Cache-Hits
X-Via-NSCOPI
CPC-Cache
X-Planisys-CDN-TTL
X-Ftr-Request-Id
X-Planisys-CDN-Cache
X-CLOUD-TRACE-CONTEXT
X-Planisys-CDN-Rules
VNS-Cache
X-HS-Content-Campaign-Id
My-App
X-Via-Poph
X-Via-Popn
X-Mvc-Supplant-OutputCached
X-Vc
X-Conf
Powered-By-ChinaCache
X-Pass-Why
X-Unique-Id
X-Via-Popv
X-TX-ID
X-Zone
X-BBC-Edge-Cache-Status
X-Ratelimit-Remaining
MIME-Version
X-GEO
Geo-Info
X-PJAX-URL
X-Worker
X-Refresh
X-Ckpd-Fst-Backend
XServer
Time
X-Internal-Host
X-LB-ID
Memory
X-Auto-Login
X-Servedbyhost
X-NC
X-ID
X-V-Cache
X-LSADC-Cache
X-OVcl-Cache
X-NCache
X-OVcl
X-DC
WebServer
X-Rocket-Nginx-Serving-Static
X-ZONE
Cf-Bgj
X-NewRelic-App-Data
X-TraceId
Server-ID
X-Render-Time
X-Backend-TTL
X-TIME
X-Geo
HostName
X-Traceid
X-Webkit-Csp
X-Platform-Cluster
X-M-Reqid
X-M-Log
X-Platform-Router
X-Platform-Processor
X-Qnm-Cache
Magicmarker
DB-Nickname
X-Newrelic-Synthetics
X-Tx-Id
X-Cache-Remote
GeoIp-Country-Code
X-SD-PageType
Geoip-Latitude
X-Wa
Tcn
X-Datadog-Sampling-Priority
Hostname
X-Method
X-Dispatcher-Server
Environment
X-App
X-Datadog-Parent-Id
X-Dynatrace
X-Datadog-Trace-Id
X-Webkit-CSP-Report-Only
X-Gdpr
X-Nyt-Route
X-Tb-Optimization-Total-Bytes-Saved
X-BBC-Origin-Response-Status
X-NodeID
X-API-Version
Resin-Trace
X-Cache-Config
X-Origin-Time
Ssr
X-IP
X-Server-IP
X-VCL-Version
X-Edge-Pop
Cluster
X-Pod-Name
X-Via-Ucdn
X-Correlation-ID
X-Akamai-Pragma-Client-IP
X-Li-Proto
X-Cache-Var-Map
X-Cache-Var
X-Origin-Response-Time
Candidate-Md5Url
Ohc-File-Size
X-Nc
X-CACHE-AGE
X-LI-Proto
X-MSEdge-Features
X-MSEdge-Flight
X-HostName
LB
X-HITS
X-Varnish-Beresp-TTL
X-Vcl-Version
Datacenter
X-ElasticPress-Query
Web-Mar-Region
N-Cache
X-Trv-Group
X-DynaTrace-JS-Agent
Cf-Ipcountry
X-Node-Id
X-NODE
X-APP
X-Via-CDN
X-Content
X-Ua-Browser
X-AB
X-ND-Cache
X-Wix-Viewer-Type
Env
X-ServerName
Onion-Location
GeoIP-Country-Code
GeoIP-Latitude
X-WA
X-Fastly-Request-Id
X-Reqid
X-Varnish-Cacheable
WWW-Authenticate
Proxy-Connection
Servername
Cdn
X-HS-Status
CDN
Server-Id
X-EIG-Tracking-Id
CF-Cached-On
X-Cs
Sid
X-Dynatrace-Js-Agent
WZWS-RAY
Rt-Fastcgi-Cache
Viewtype
VivaBuild
X-MG-S
X-NGINX-Cache
Machine
X-Fastly-Backend-Reqs
X-FTR-Request-ID
X-Lb-Id
X-TIM-N
X-Cdn-Forward
X-Check-Cacheable
Lb
Cteonnt-Length
X-Tid
X-Pjax-Url
X-URL
X-Request-Start
X-Fpc
Redirect-Candidate
X-ServedByHost
X-CSRF-TOKEN
X-Esi
X-Xrds-Location
Ohc-Cache-HIT
Mime-Version
X-Via-PopV
X-Via-PopN
On-Server
X-VC
X-IN-APIGATEWAY
X-Cache-Backend
X-IN-APIGATEWAYSSL
X-Via-PopH
FSS-Cache
Tracecode
X-Up
X-Cache-Date
CountryCode
Server-Ttl
Shield-Pop
URI
X-Swa-Ws
Pramga
X-Amz-Meta-Cb-Modifiedtime
Is-Us
X-SN
X-FTR-Balancer
X-FTR-Backend-Server
X-FTR-Backend
X-Fastly-Cache-Hits
X-FTR-Cache-Status
X-Varnish-Authentication
X-Contensis-Viewer-Groups
X-Cache-ASPX
X-FORWARDED-FOR
Xc-Version
X-LiteSpeed-Cache-Control
X-Oss-Storage-Class
X-Oss-Server-Time
X-Oss-Request-Id
X-FTR-DC
X-Cdn-Origin
X-Sn-Servicetimems
CACHE
X-Oss-Hash-Crc64ecma
X-Oss-Object-Type
X-Country-Code-Real
X-FTR-Realm
X-Swift-Error
X-Air-Pt
X-Provided-By
Content-Style-Type
X-RPS
X-RSL
X-Core-Mission
W
Content-Script-Type
X-RAMCache
X-Acquia-Application-UUID
X-Acquia-Application-Trace
Xet-Cookie
X-Acquia-Purge-Tags
X-Acquia-Site
X-StackifyID
X-RPM
CloudFront-Viewer-Country
X-SB
X-Pf-Uncompressing
X-Webstats-RespID
X-DW
X-Yottaa-OS
X-Dw-Trace-Id
Warning
X-ElasticPress-Search
X-Pad
WP-Super-Cache
X-Action
X-DB
X-DI
X-DSS
ServerName
Vha6-Origin
Ohc-Response-Time
X-CCM
X-CCDN-CacheTTL
X-CCDN-Origin-Time
X-CUA
X-FPC
X-Cdn-Request-ID
X-Snapshot-Date
X-Hcs-Proxy-Type
X-MiniProfiler-Ids
X-Mg-Request-Id
X-TH-Server
X-Tt-Logid
X-FTR-Expires
X-C