Threat Level: green Handler on Duty: Johannes Ullrich

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-Request-Id
CF-RAY
CF-Cache-Status
X-XSS-Protection
Accept-Ranges
Link
Pragma
ETag
Expect-CT
X-Powered-By
Via
Age
X-Cache
Content-Security-Policy
Access-Control-Allow-Origin
Content-Language
P3P
Referrer-Policy
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-Cache-Hits
X-UA-Compatible
Alt-Svc
X-Served-By
X-Timer
X-Download-Options
Access-Control-Allow-Headers
X-Varnish
X-Request-Id
Access-Control-Allow-Methods
Access-Control-Allow-Credentials
X-AspNet-Version
X-Runtime
X-Adblock-Key
Content-Security-Policy-Report-Only
X-Drupal-Cache
X-Permitted-Cross-Domain-Policies
X-Check
X-Xss-Protection
X-Cache-Status
X-Generator
X-Cacheable
X-DNS-Prefetch-Control
X-Request-ID
Timing-Allow-Origin
X-Content-Security-Policy
X-Iinfo
Content-Encoding
X-CDN
X-Ua-Compatible
Feature-Policy
X-AspNetMvc-Version
Status
X-Envoy-Upstream-Service-Time
Access-Control-Expose-Headers
X-Drupal-Dynamic-Cache
Upgrade
X-Via
Access-Control-Max-Age
Keep-Alive
X-Ws-Request-Id
X-Age
X-Robots-Tag
X-AH-Environment
X-Turbo-Charged-By
EagleId
Request-Context
X-Proxy-Cache
X-Cache-Group
Server-Timing
X-Backend
X-Hacker
X-Server
X-Dns-Prefetch-Control
Report-To
Host-Header
X-Server-Powered-By
X-Amz-Request-Id
X-Amz-Id-2
Grace
X-Nginx-Cache-Status
X-UA-Device
X-Rq
X-Varnish-Cache
X-Swift-CacheTime
X-Swift-SaveTime
Ali-Swift-Global-Savetime
X-Page-Speed
X-LiteSpeed-Cache
Cf-Railgun
X-Pingback
X-Styx-Req-Id
X-Pantheon-Styx-Hostname
X-OneAgent-JS-Injection
X-Cache-Spec
X-Amz-Version-Id
NEL
X-Device
X-CST
Allow
X-Vhost
X-Host
X-Backend-Server
Xkey
X-Server-Id
X-WebKit-CSP
EagleEye-TraceId
X-Dispatcher
Surrogate-Control
X-Node
Request-Id
Content-Location
X-Response-Time
X-Akam-SW-Version
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
Accept-Ch
P3p
X-ASPNET-VERSION
X-Ruxit-JS-Agent
X-Application-Context
X-Ac
X-Cache-Lookup
Accept-Ch-Lifetime
X-Country
X-Template
X-Mod-Pagespeed
X-Language
X-Readtime
X-Cloud-Trace-Context
Accept-CH
X-B3-TraceId
MS-Author-Via
Rating
Accept-CH-Lifetime
X-HW
X-Origin-Cache
X-Cnection
X-MS-InvokeApp
X-Url
X-TtlSet
X-PC
X-Vname
Edge-Control
X-Clacks-Overhead
X-GitHub-Request-Id
X-ESI
X-Trace
X-ORACLE-DMS-RID
X-ORACLE-DMS-ECID
X-Sol
Response
Pagespeed
X-Middleton-Display
X-Middleton-Response
Display
X-Varnish-TTL
X-Content-Type
X-D2id
Arr-Disable-Session-Affinity
Verso
X-GoogleNews-Bot
X-Exp-Variant
X-Exp-Id
X-Cdn-Fetch
X-Kinja
X-Use-Magma
X-Kinja-Server
X-Kinja-Build
X-Kinja-Revision
X-Vcap-Request-Id
X-Goog-Hash
X-Country-Code
X-Rack-Cache
X-TTL
X-Powered-By-Plesk
X-Navigation-Version
Service-Worker-Allowed
X-Oneagent-Js-Injection
X-Server-Name
X-VARITI-CCR
X-Buckets
X-Amz-Rid
X-Abt-Application-Version
X-Fastly-Request-ID
X-Webkit-CSP
X-Client-IP
Fastly-Restarts
X-Cache-TTL
X-FastCGI-Cache
X-Cached
X-MSEdge-Ref
X-Release
X-Element-Page-Cache
X-Dw-Request-Base-Id
Pinterest-Generated-By
X-Pinterest-Rid
Pinterest-Version
SPRequestGuid
X-SharePointHealthScore
X-NF-Request-ID
SPRequestDuration
SPIisLatency
MRF-Tech
X-B3-TraceId-Primal
Mrf-Cache-Status
Public-Key-Pins
RTSS
Access-Control-Request-Method
AR-CACHE
AR-Request-ID
Ar-Sid
AR-PoweredBy
AR-ATIME
X-SRCache-Fetch-Status
X-SRCache-Store-Status
X-Edge
X-LLID
X-Powered-CMS
Cache-Tag
X-Ezoic-Cdn
X-Litespeed-Cache
X-Upstream
Content-MD5
X-Origin-Upstream-Status
X-Jurisdiction
X-HP-Webp
X-Version
S
Fusion-Source
Fusion-Template-Id
Fusion-Content-Source
Fusion-Deployment-Id
Fusion-Content-Id
Fusion-Component-Id
X-Px
X-Mid
X-MCACHE
X-ECACHE
X-Recruiting
X-Mg-S
Charset
X-Ruxit-Js-Agent
X-Content-Digest
X-PressLabs-Stats
X-Kinsta-Cache
X-DynaTrace
Fastcgi-Cache
X-T
Cache-Tags
X-Fastcgi-Cache
X-Amz-Server-Side-Encryption
X-Id
X-Logged-In
Filters
X-Accel-Expires
MicrosoftSharePointTeamServices
X-Content-Security-Policy-Report-Only
X-Ttl
Server-Node
X-Forwarded-Proto
Edge-Cache-Tag
Front-End-Https
X-Correlation-Id
TP-Cache
TP-L2-Cache
X-Grace
X-Forwarded-For
Server-Name
X-Debug
Nginx-Cache
X-Hits
X-Amzn-Trace-Id
X-Kong-Proxy-Latency
X-Kong-Upstream-Latency
X-Request-Received
X-Request-Processing-Time
X-XRDS-LOCATION
TCN
X-B3-Sampled
X-Shield-Request-Id
X-Yandex-Sdch-Disable
Surrogate-Key
X-Varnish-Age
X-Microsite
X-Request-Handler-Origin-Region
X-AppVersion
X-Az
X-Activity-Id
X-Ser
X-Amz-Replication-Status
X-HS-Content-Id
X-HS-Cache-Config
X-HS-Hub-Id
X-HS-Combine-CSS
X-F-Cache
X-Origin-Server
X-DIS-Request-ID
X-Goog-Stored-Content-Length
X-GUploader-UploadID
X-Goog-Stored-Content-Encoding
X-Goog-Storage-Class
Alternate-Protocol
X-Goog-Generation
X-Goog-Metageneration
X-Pinterest-Direct
Accept-Charset
Nel
X-Geo-Country
X-XRDS-Location
X-Rid
X-Git-Hash
X-Frontend
Section-Io-Cache
X-Respond-Thread
Host
X-Time
X-NWS-LOG-UUID
X-Cache-Key
X-LB-Cache
X-DataDome
X-Upgrade-Enabled
Cache
X-Mobile-URL
Access-Control-Allow-Method
X-Seen-By
X-VCache
MS-CV
X-Server-ID
X-Cache-Age
X-FTR-Request-ID
ServerID
Paypal-Debug-Id
X-TT
X-IPLB-Instance
X-Type
X-AOL-HN
Healthy
X-Source
X-Content-Options
X-Varnish-Backend
X-App-Environment
X-Hostname
X-Request-Guid
X-Providence-Cookie
X-Is-Crawler
X-Flags
X-Route-Name
X-Aspnet-Duration-Ms
X-Whom
Payment
Cleartype
X-Signature
X-Cache-Action
X-B-Cache
X-Daa-Tunnel
X-Page-Id
Fastcgi-Useragent
X-Jobs
X-Debug-Info
X-RateLimit-Remaining
X-WebKit-CSP-Report-Only
X-N
X-Load-Cache
Powered-By-ChinaCache
X-FB-Debug
X-Webkit-Csp
X-Mobile
Realpath
X-Erf-Bev-Bev
X-Erf-Bev-Bev-Is-Generated
X-Contextid
X-Browser-Type
Node
Refresh
X-TEC-API-ROOT
X-TEC-API-ORIGIN
X-TEC-API-VERSION
X-Rule
X-Via-JSL
X-Original-Request-Id
X-Accel-Buffering
Version
X-Wix-Request-Id
X-Response-Served-From
X-Zen-Fury
X-Drupal-Cache-Tags
X-RTag
X-Proxy
X-Cache-Expired-At
DC
Ms-Operation-Id
X-Framework
X-Cacheable-TTL
Referer-Policy
X-Real-IP
X-B
X-RemovedCookies
X-HTML-Minification-Powered-By
X-Instance
Access-Control-Request-Headers
X-ProcessESI
X-Distributor
X-Cache-Control
X-Cluster-Name
X-Content-Powered-By
X-Tt-Trace-Tag
Eomportal-Instance
X-FW-Server
X-FW-Dynamic
X-Cached-By
X-FW-Hash
X-Tt-Trace-Host
X-Drupal-Cache-Contexts
Viewport
X-FW-Type
X-FW-Static
X-FW-Serve
X-Page-View
X-Cache-Time
X-Akamai-Edgescape
X-Region
X-UUID
VIX-Pulpo-Node
X-Cache-Rule
X-Cache-Operation
X-IPS-LoggedIn
VIX-Pulpo-Upstream-Status
Countrycode
Liferay-Portal
X-Yottaa-Metrics
X-Yottaa-Optimizations
X-Cache-Hit
X-FireWall-Port
X-G
X-Environment-Context
X-Tumblr-Pixel
X-Tumblr-Pixel-0
X-Tumblr-User
X-L-Path
X-Tumblr-Pixel-1
X-Pass-Why
X-App-Server
Server-Info
DynaTrace
Xserver
SRV
CF-IPCountry
Section-Origin-Responded
X-Nginx-Cache
Section-Io-Id
Section-Io-Origin-Status
Section-Io-Origin-Time-Seconds
X-Protected-By
X-User-Agent
X-Debug-IsConnected
Ec-Rule-Version
From-Origin
X-Debug-IsPreview
Webserver
X-Www-Served-By
X-Tumblr-Pixel-2
X-Tec-Api-Version
X-Tec-Api-Origin
X-Tec-Api-Root
X-Ratelimit-Limit
X-Device-Type
X-Mode
X-Endurance-Cache-Level
Meta-Geo
X-Adobe-Content
X-Handled-By
X-Hl-Ver
X-RN-RSRV
X-UPSTREAM-Address
X-Adobe-Loc
X-ES-SERVER
Protected
GEO-INFO
X-MP-GENERATED-AT
X-FB-TRIP-ID
X-Cache-Server
X-Backend-Name
X-Uri
Cache-Tv-Group
TWC-GeoIP-Country
Retry-After
Cache-Status
Webcakes-App-Name
Webcakes-App-Version
X-Labrador-Cache-Channel
X-Varnishpool
X-Locale
Webcakes-Region
X-NYM-Debug-Backend
TWC-Locale-Group
Property-Id
X-Be
X-Varnish-Grace
TWC-Connection-Speed
TWC-Device-Class
TWC-Privacy
TWC-GeoIP-LatLong
X-Node-Name
X-Origin-Hint
X-Site-Version
X-PHP-Host
X-Soup
X-WA-Info
X-OCL
X-Web-Node
X-BYPASS-REASON
X-UA-Device-Type
X-Timing-Wait
Frame-Options
Mn-Server-Ip
Selected-Fe
Country
Cache-Name
X-Via-Fastly
X-AWS-Id
X-PCL
X-FW-Version
X-VWS-Id
X-Format
X-Sql-Count
X-ProxyCache-Status
X-R9-Blue-Green-Version
X-Redis-Cache
X-Pubstack
X-Storage
X-Sql-Duration-Ms
Fastly-SSL
X-Origin-Date
X-Proto
X-Proxy-Build
X-ProxyCache-Key
X-No-Session
X-LJ-Flow-ID
X-Section
X-Human
X-Server-W
Decoy-Debug-Key
Decoy-Debug-TTL
X-Request-Time
X-Access
Decoy-Debug-Status
Azure-Version
Azure-SlotName
X-Cache-TTL-Remaining
X-TNCMS
X-Proxied
X-AIR-PT
X-S-Maxage
X-Routing-Service
Azure-RegionName
X-Say-Cacheable
X-ApacheServer
X-Status
X-Say-TTL
X-SayCDN-TTL
Azure-SiteName
X-Zipkin-Id
X-Loop
X-Xfnlog-Site
X-Hosted-By
X-Hyper-Cache
X-PERF
X-LAGOON
Azure-InstanceId
X-Shopify-Stage
X-Sorting-Hat-PodId
X-Sorting-Hat-ShopId
X-ShopId
X-CCM
AMP-Access-Control-Allow-Source-Origin
X-Storefront-Renderer-Rendered
X-ShardId
X-Alternate-Cache-Key
X-Cluster
X-Cache-Grace
Apigw-Requestid
X-Varnish-Server
X-TT-LOGID
X-Forwarded-Host
X-GG-Cache-Date
X-Is-Bot
X-Revision
X-Rendered-As
X-Info
X-SRV
X-Qloud-Router
X-Dc
S-Cnection
X-Ratelimit-Remaining
X-Microcachable
X-Cache-Enabled
X-TA-CDN-Provider
X-Content-Age
X-Cdn
X-Proxy-Cache-Status
Uber-Trace-Id
X-Via-CDN
X-Platform
Cache-Hits
X-NWS-UUID-VERIFY
X-Azure-Ref
X-FTR-Backend
X-FTR-Cache-Status
X-Country-Code-Real
X-FTR-DC
X-FTR-Backend-Server
X-FTR-Realm
X-FTR-Balancer
X-CSRF-Token
X-Varnish-Ttl
X-App-Version
X-Backend-Host
X-Aspnetmvc-Version
X-Cache-Host
X-Detected-As
X-Amz-Meta-S3cmd-Attrs
X-Amz-Apigw-Id
X-Amzn-RequestId
X-Amzn-Remapped-Content-Length
Akamai-GRN
X-EdgeConnect-Cache-Status
X-FTR-Expires
X-ATG-Version
Amp-Access-Control-Allow-Source-Origin
X-B3-SpanId
SD-X-WS
X-CS
X-Oss-Object-Type
X-Oss-Storage-Class
X-Oss-Hash-Crc64ecma
X-Oss-Server-Time
X-Trace-Id
X-Air-Hostname
Tracecode
X-Oss-Request-Id
X-Debug-Cache
X-RCS-CacheZone
X-Time-Microsecs
HostName
ServedBy
X-Cache-PHP
X-Varnish-Hostname
X-Cache-NGX
X-Backend-TTL
X-DynaTrace-JS-Agent
X-ServerID
X-BCube-Filmed-By
X-Correlation-ID
X-Tb
X-TX-ID
DB-Nickname
X-Akamai-Transformed
X-Cache-Var-Map
X-Cache-Var
Backend
X-Ms-Version
X-Ms-Request-Id
X-NewRelic-App-Data
X-Cache-NE
X-Application
X-ARC
X-External-Request-Id
X-Processor
X-B-Cookie
X-Request-UUID
X-Rewrite-Enabled
Meta-Geo-Continent
X-CF-Lambda-Fn
X-S-Cookie
X-S
X-ScT
X-Rojux
X-PBS-Appsvrname
X-CF-Lambda-Version
BehaviorPad-Version
X-Generation-Time
X-NAPM-TraceId
Odigeo-Trace-Id
X-Location
Mobile-Detection-Method
MD5-Digest
X-Level-Front-Cache
X-Generated-On
Machine
X-Session-Fingerprint
X-Owner
X-Origin-TTL
X-Origin-CC
X-Adobe-Source
X-From
X-PAYTM-SRV-ID
X-Magnolia-Registration
Expiry
X-A
Fastcgi-X-Cache-Version
X-Vtex-Processado-Em
X-A-Dam
X-A-Ccd
DCR-Decision-By
DCR-Processing-Time-Ms
X-VG-WebServer
X-Vdms-Version
X-Vdms-Path
Rendered-Blocks
X-D
X-VG-WebCache
Xc-Version
X-A-Dgt
X-Connection-Hash
X-A-Wwc
X-SRCache-Key
X-Aed
X-A-Dcw
T-Server
X-Cdn-Forward
X-Destination
X-Trv-Group
X-Vtex-Remote-Cache
X-Sucuri-ID
X-Nc
Fastly-Backend-Name
X-GeoIP-City
X-B3-Traceid
X-Has-Esi
X-Core-Value
Wxu-Next-Commit
Magicmarker
Gh-Request-Id
X-Geo-Header
Arc-Version
Host-ID
Cf-Device-Type
X-Developers
X-Device-Os
Instruction
Content-Disposition
CacheControlHeader
X-Fetched-On
AKAMAI
X-FC-Vary-Parameters
X-Fastly-Cache
Locid
X-Varnish-Cache-Hits
X-Thanos
X-Thinkindot-L3
X-EC-Lua
X-TrackingId
Server-Host
Release
X-Azure-Ref-OriginShield
X-Reqid
X-CACHE-KEY
X-Tumblr-Pixel-3
X-Unique-ID
Thinkindot-CacheControl-Type
Thinkindot-Control
UCS
Thinkindot-CacheControl
Wxu-Next-Hostname
Wxu-Next-Region
X-Unique-Id
SR-User-Adfree
X-HS-Content-Campaign-Id
X-Policy
X-Mvc-Supplant-Cachable
On-Server
Pagetype
X-Micro-Cache
X-Cache-Bucket
X-Irp-Debug
X-Is-Gdpr
X-JWT-State
X-Cms-Context
X-Bip
X-OVcl
X-OVcl-Cache
PB-PID
PB-RID
Path
X-Varnish-Beresp-Grace
User-Cache-Control
DSUID
X-Clientip
X-Cache-Info
X-Cache-Debug
X-Backend-State
X-Branch-Name
X-Cache-Tags
X-CGP
X-Clara-WADP
X-Block-Status
X-Cache-Id
X-GoCache-CacheStatus
X-SIPLIST1
X-Scheme
X-Skip-Cache
X-SVT-ORM-RULES
X-SVT-ORM-VERSION
X-Request-Host
X-Rebelmouse-Surrogate-Control
X-Origin-Response-Time
X-Origin-Expires
X-Platform-Server
X-Ratelimit-Reset
X-Rebelmouse-Cache-Control
X-Swa-Ws
X-Var-Ttl
X-Wikidot-Backend
X-WADP-Cache
X-Wikidot-Static-Cache
V-Age
X-Generated-In
X-VServer
X-VarnishDD-TTL
X-Variation
X-Varnish-CookieHashed-On
X-Varnish-CookieINHashed-On
X-Varnish-Remaining-TTL
X-Origin
X-Old-Content-Length
X-Esi-Check
X-Envoy-Decorator-Operation
X-Eu-Site
X-Fastly-Backend
X-Fmm-Version
X-DPWN-IS-SECURE
X-Dispatcher-Server
X-CUA
X-DefElseHash
X-DefHash
X-Developer
X-Gen-Mode
X-Generated-By
X-Method
X-LI-UUID
X-Nginx-Cache-Key
X-Node-Id
X-NU-AKA-ACS-Version
X-Li-Pop
X-Li-Fabric
X-GeoIP
X-Gzip
X-Hnp-Log
X-IP
X-Csrf-Jwt
X-HN
Fastly-SWR
Fastly-SIE
Cf-Bgj
CDN-Uid
Ha-Gx-Prefs
HA-Ipaddr
Location
L5d-Success-Class
IsBot
Is-Eu
CDN-RequestId
CDN-RequestCountryCode
Adler-Geo
Web-Mar-Node
Geo-Info
X-GEO
C-Via
Cache-Host
CDN-EdgeStorageId
CDN-CachedAt
CDN-Cache
CDCHOST
NGX
CDN-PullZone
Server-Hostname
Server-Ext
PFcat
Sever-Int
Ssr
Platform
NM-Fastcgi-Cache
X-Cache-Backend
X-ID
X-Varnish-Beresp-Ttl
True-Client-Country-4JS
Esi-Enabled
Apple-News-Services-Request-Url
X-Gamma-Serve
Vix-Hermes-Req-Id
X-Request-URI
Rt-Fastcgi-Cache
Apple-News-Services-Host
Apple-News-Services-Handled
X-Matched-Rule
X-Slack-Backend
Who
X-LB-ID
X-Varnish-Beresp-Status
X-Hash
X-Varnish-Hits
X-User
Apple-News-Services-Parsed-Url
Origin
L
X-VG-TLSProxy
Lfy
X-CLOUD-TRACE-CONTEXT
Country-Code
X-Aicache-OS
CloudFront-Viewer-Country
Fastly-Drupal-HTML
X-Loc
X-Goog-Meta-Goog-Reserved-File-Mtime
X-Mvc-Supplant-OutputCached
X-APP-VERSION
Sid
X-RateLimit-Limit
X-Varnish-Url
X-Via-Poph
X-Via-Popv
X-NCache
X-PF-Uncompressing
X-Via-Popn
Pics-Label
Tcn
X-Cache-Expires
X-Sn-Servicetimems
Pramga
X-Cdn-Origin
X-Epic-Correlation-Id
X-Cache-Date
X-Core-Mission
Filterid
X-Planisys-CDN-TTL
X-Servername
X-Planisys-CDN-Rules
X-Planisys-CDN-Cache
X-Refresh
Url
X-Request-Start
X-Tb-Optimization-Total-Bytes-Saved
X-TraceId
Cmsid
X-FireWall-Protection
Req-Svc-Chain
Cmstype
X-Error
X-Served-From
Kp-EeAlive
X-Varnish-Cacheable
Svr
Source
MIME-Version
A
VivaBuild
Cache-Key
X-Response-By
Viewtype
NGB
X-Erf-Stays-Bingo-Pdp-Web
X-NC
X-Webkit-CSP-Report-Only
X-Proxy-Cachei7
GeoIp-Country-Code
M-TraceId
Geoip-Latitude
Xkeyi7
X-Srv
X-DC
X-Cache-Remote
Server-ID
Arc-Country
Cross-Origin-Opener-Policy
S-Rt
X-Vcl-Version
X-BBXSRF
N-Cache
Server-Ttl
X-HS-Status
X-Air-Source
Content-Secure-Policy
HitType
X-URL
X-Vgn-Hpd-Reason
X-Wa
X-Servedbyhost
X-Cache-2
X-HostName
X-B3-Spanid
TDXMobile
X-Geo
NtCoent-Length
X-Varnish-Authentication
X-Contensis-Viewer-Groups
X-Li-Proto
X-Cc-Req-Id
X-LiteSpeed-Cache-Control
X-Esi
D-Cc-Upstream
X-Cc-Via
X-Vc
Resin-Trace
X-Cache-ASPX
DataCenter
CACHE
X-SaId
X-CDN-Forward
X-JoinUs
Ohc-File-Size
X-Host-Name
X-Sucuri-Cache
X-PHP-Backend
SID
X-NGENIX-Cache
Cteonnt-Length
Cross-Origin-Window-Policy
X-Edge-Location
X-Svr
X-Service
X-LI-Proto
X-RAMCache
X-Internal-Host
X-HOST
X-CCDN-CacheTTL
X-Hcs-Proxy-Type
X-CCDN-Origin-Time
X-WA
Request-ID
X-Server-IP
X-ServedByHost
X-UA
X-Extlb
X-VCL-Version
X-TIM-N
X-DB
X-Newrelic-Synthetics
X-Cache-Config
X-Gdpr
X-Forwarded-Site
FSS-Cache
X-DI
X-FPC
X-Nyt-Route
X-Viewer-Country
X-DSS
X-RSL
X-RPM
X-RPS
X-Origin-Time
X-DW
X-API-Version
Hostname
X-Bc-Bl
X-Check-Cacheable
GeoIP-Latitude
Cache-Provider
CF-Cached-On
GeoIP-Country-Code
X-Cs
X-SN
X-Dynatrace
X-Via-NSCOPI
X-VC
Ohc-Cache-HIT
XServer
We-Hiring
X-Action
X-Accel-Expires-Debug
Server-Id
Memcached
LB
Mail-Subject
ProcessTime
X-SB
Surrogated-Key
X-Req
X-ZONE
X-Webstats-RespID
X-Proxy-Upstream
X-VC-Cache
X-App
X-NodeID
X-PJAX-URL
X-Date
Env
X-RateLimit-Limit-Second
X-SD-PageType
X-Region-Sid
Mime-Version
X-RateLimit-Remaining-Second
X-APP
X-CF-Powered-By
X-Oss-Cdn-Auth
X-Fpc
X-Swift-Error
X-Provided-By
X-Dynatrace-Js-Agent
X-Air-Trace-Id
X-FORWARDED-FOR
X-Men
X-Render-Time
W
X-Depends-On
Upgrade-Insecure-Requests
X-Sigma-Backend
X-BBC-Edge-Cache-Status
X-Sigma
X-Rocket-Build-Number
Srv
X-Cdn-Request-ID
X-NGINX-Cache
X-UnsetCookies
X-TIME
VNS-Age
VNS-Cache
X-MSEdge-Flight
X-CSRF-TOKEN
Memory
X-BACKEND-TTL
X-Ftr-Cache-Host
X-Dw-Trace-Id
EpKe-Alive
Time
CPC-Age
CPC-Cache
CDN
X-MSEdge-Features
Cdn
X-FTR-Cache-Host
X-Client-Ip
X-CACHE-AGE
X-Hello
X-ABtesting
X-Flog
X-Cache-Tag
X-Worker
X-Fastly-Backend-Reqs
X-Fastly-Request-Id
X-Server-Lifecycle-Phase
X-Kraken-Loop-Name
X-Kraken-Routeconfig-Destination
X-Instrumentation
Dnion-Transfer-Encoding
Processtime
X-Auto-Login
X-Parent-Response-Time
X-Akamai-Pragma-Client-IP
X-Ua
X-ServerName
X-Acquia-Application-UUID
X-Zone
X-Pf-Uncompressing
X-Cluster-Node
X-Pad
Media-Length
X-Presslabs-Stats
Proxy-Connection
X-BBC-Origin-Response-Status
X-Acquia-Site
X-Acquia-Purge-Tags
X-Acquia-Application-Trace
Vha6-Origin
X-Oracle-DMS-ECID
X-Edge-Location-Klb
PICS-Label
X-IN-APIGATEWAY
State
My-App
Fastcgi-Cache-TTL
X-IN-APIGATEWAYSSL
X-LiteSpeed-Tag
Datacenter
X-Via-PopH
X-Snapshot-Date
X-Via-PopV
X-Via-PopN
Epwk-X-Cache
Cf-Ipcountry
X-Akamai-ERPolicy
X-Request-URL
X-Vcache
X-Ms-Meta-Originalurl
X-ElasticPress-Query
X-Ms-Meta-Staticbatchstarttime
X-Varnish-URL
X-Lb-Id
Xet-Cookie
X-Akamai-ERRuleID
X-Minions-Version
X-MiniProfiler-Ids
X-Varnish-Beresp-TTL
X-ElasticPress-Search
CountryCode
X-Apw-Access-Token
X-Apw-Hits
X-Litespeed-Cache-Control
X-Mg-Request-Id
X-Cache-Status-Check
X-Apw-Access-Action
X-B3-Parentspanid
URI
Content-Style-Type
Content-Script-Type
X-Apw-Access-Object
X-Redis-Duration-Ms
X-Debug-Cache-Store
NnCoection
X-Debug-Cache-Fetch
Ohc-Response-Time
X-Traceid
X-Storefront-Renderer-Verified
Environment
X-C
X-Tid
X-Amz-Meta-Cb-Modifiedtime
OT-Force-Account-Verify
X-Redis-Count
Phost
Inserted-Into-Cache-At
X-Request-Url