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
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-Cache-Status
Link
Accept-Ranges
CF-RAY
ETag
Expect-CT
Pragma
X-Powered-By
X-XSS-Protection
Via
X-Cache
Age
Content-Security-Policy
Access-Control-Allow-Origin
Content-Language
Referrer-Policy
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-Cache-Hits
P3P
Alt-Svc
X-UA-Compatible
X-Served-By
X-Xss-Protection
X-Download-Options
X-Request-Id
X-Timer
Access-Control-Allow-Headers
X-Varnish
Access-Control-Allow-Methods
Access-Control-Allow-Credentials
X-AspNet-Version
X-Runtime
X-Adblock-Key
X-Permitted-Cross-Domain-Policies
Content-Security-Policy-Report-Only
X-DNS-Prefetch-Control
X-Drupal-Cache
X-Cache-Status
X-Check
X-Generator
X-Cacheable
Timing-Allow-Origin
X-Content-Security-Policy
X-Iinfo
Feature-Policy
Status
X-Envoy-Upstream-Service-Time
Content-Encoding
Access-Control-Expose-Headers
P3p
X-Drupal-Dynamic-Cache
X-AspNetMvc-Version
X-CDN
Upgrade
X-Via
CF-Ray
X-Ws-Request-Id
Access-Control-Max-Age
X-Request-ID
Server-Timing
EagleId
X-Cache-Group
X-Turbo-Charged-By
Report-To
Keep-Alive
X-UA-Device
Request-Context
X-Age
X-Backend
X-Proxy-Cache
X-Server-Powered-By
X-AH-Environment
X-Robots-Tag
X-Hacker
X-Amz-Request-Id
X-Server
Host-Header
X-Amz-Id-2
Grace
X-Rq
X-LiteSpeed-Cache
X-Swift-CacheTime
X-Swift-SaveTime
X-Varnish-Cache
X-Nginx-Cache-Status
Ali-Swift-Global-Savetime
NEL
X-WebKit-CSP
X-Page-Speed
X-Vhost
EagleEye-TraceId
X-Ua-Compatible
X-Amz-Version-Id
X-OneAgent-JS-Injection
X-Pingback
X-Dispatcher
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Device
X-Cache-Spec
X-Host
Accept-CH
X-Dns-Prefetch-Control
Cf-Railgun
X-Server-Id
X-Node
X-Backend-Server
X-Readtime
Surrogate-Control
X-Akam-SW-Version
Request-Id
X-Response-Time
X-HW
Xkey
X-Application-Context
Content-Location
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
Rating
Accept-Ch-Lifetime
X-Ruxit-JS-Agent
X-Country
X-B3-TraceId
X-Cloud-Trace-Context
X-Cache-Lookup
Accept-CH-Lifetime
X-Trace
X-Url
Allow
X-Ac
X-Content-Type
X-TtlSet
X-Vname
X-PC
X-Varnish-TTL
X-Aws-Lambda-Call-Status
X-Clacks-Overhead
Edge-Control
X-Server-Name
X-Mod-Pagespeed
X-ESI
Fastly-Restarts
Cache-Tag
X-Rack-Cache
Service-Worker-Allowed
X-VARITI-CCR
X-FastCGI-Cache
Verso
X-Element-Page-Cache
MS-Author-Via
X-Upstream
X-Vcap-Request-Id
X-MS-InvokeApp
X-Amz-Rid
Public-Key-Pins
X-GitHub-Request-Id
X-Dw-Request-Base-Id
X-Cached
X-Client-IP
X-D2id
X-Abt-Application-Version
X-Cache-TTL
X-Cnection
X-Px
RTSS
X-GoogleNews-Bot
X-Cdn-Fetch
X-Kinja-Server
X-Kinja-Build
X-Exp-Id
X-Exp-Variant
X-Kinja-Revision
X-Use-Magma
X-Kinja
X-Navigation-Version
Arr-Disable-Session-Affinity
Access-Control-Request-Method
X-Country-Code
X-Powered-By-Plesk
X-NF-Request-ID
X-Goog-Hash
X-ORACLE-DMS-ECID
X-ORACLE-DMS-RID
X-Kraken-Loop-Name
X-Server-Lifecycle-Phase
X-Instrumentation
X-TTL
AR-Request-ID
AR-CACHE
AR-SID
X-Powered-CMS
AR-PoweredBy
AR-ATIME
Pagespeed
X-Sol
Display
X-Middleton-Display
X-Version
X-Origin-Cache
X-Middleton-Response
Response
X-LLID
X-MSEdge-Ref
X-Amz-Server-Side-Encryption
Nginx-Cache
TCN
X-Edge-Location-Klb
X-Kinsta-Cache
X-RateLimit-Remaining
X-Edge
Mrf-Cache-Status
X-B3-TraceId-Primal
MRF-Tech
X-Protected-By
X-CST
X-SRCache-Store-Status
X-SRCache-Fetch-Status
X-T
X-Jurisdiction
X-HP-Trace-Id
X-HP-Webp
X-Forwarded-For
X-Content-Security-Policy-Report-Only
Accept-Ch
X-Shield-Request-Id
X-Aspnetmvc-Version
X-Id
S
Edge-Cache-Tag
Content-MD5
X-Language
X-Mg-S
SPIisLatency
SPRequestDuration
Fastcgi-Cache
Front-End-Https
X-Mid
Realpath
X-Request-Processing-Time
Server-Node
X-Request-Received
Pinterest-Generated-By
Pinterest-Version
Filters
X-Pinterest-Rid
X-Recruiting
X-DynaTrace
X-Frontend
Server-Name
X-Ab
X-Content
X-Ua-Browser
X-MCACHE
X-Cache-Key
X-Ser
X-Correlation-Id
X-Ruxit-Js-Agent
X-HS-Hub-Id
X-NWS-LOG-UUID
X-HS-Cache-Config
X-HS-Content-Id
X-Yandex-Sdch-Disable
X-Template
X-HS-Combine-CSS
X-Ezoic-Cdn
X-ECACHE
X-SharePointHealthScore
SPRequestGuid
X-Hits
X-Parallel-Accel
X-Server-ID
X-Ttl
X-Kong-Proxy-Latency
X-Kong-Upstream-Latency
X-Tt-Trace-Tag
X-Tt-Trace-Host
MicrosoftSharePointTeamServices
Cache-Tags
Charset
Cleartype
Host
X-Page-Id
X-B3-Sampled
Alternate-Protocol
X-Www-Served-By
X-Git-Hash
X-Geo-Country
X-Content-Options
X-Debug-Info
X-Daa-Tunnel
X-DIS-Request-ID
Fusion-Template-Id
Fusion-Source
Fusion-Component-Id
Fusion-Content-Id
Fusion-Content-Source
Fusion-Deployment-Id
X-Hostname
X-Amzn-Trace-Id
X-Content-Digest
X-Amz-Replication-Status
Cross-Origin-Opener-Policy
X-Varnish-Age
X-Ratelimit-Limit
Filterid
X-AppVersion
X-FB-Debug
X-Az
X-Activity-Id
X-Grace
ServerID
X-F-Cache
X-VCache
X-Upgrade-Enabled
X-N
X-Nginx-Upstream-Cache-Status
X-Accel-Expires
X-Rid
X-Forwarded-Proto
X-Origin-Server
X-Mobile-URL
Access-Control-Allow-Method
X-Providence-Cookie
X-Aspnet-Duration-Ms
X-Is-Crawler
X-Fastly-Request-ID
X-Flags
X-Route-Name
X-Request-Guid
X-Type
X-DataDome
X-TT
X-LB-Cache
X-Whom
X-Seen-By
Viewport
X-Varnish-Grace
X-App-Environment
X-GUploader-UploadID
Payment
X-Goog-Stored-Content-Length
X-Goog-Stored-Content-Encoding
X-Goog-Metageneration
X-Goog-Generation
X-Goog-Storage-Class
X-WebKit-CSP-Report-Only
X-FW-Serve
X-FW-Server
X-User-Agent
X-FW-Dynamic
Node
X-FW-Static
X-FW-Hash
X-Tb
X-FW-Type
Paypal-Debug-Id
TP-Cache
X-Distributor
TP-L2-Cache
DC
X-XRDS-LOCATION
X-App-Server
Country
X-Wix-Request-Id
X-Fastly-Request-Id
Fastcgi-Useragent
Accept-Charset
X-Litespeed-Cache
X-Cache-Rule
X-Cache-Control
X-NGENIX-Cache
X-Tec-Api-Origin
X-Tec-Api-Root
X-Tec-Api-Version
X-Fastcgi-Cache
X-Webkit-Csp
X-Webkit-CSP
Version
X-Ratelimit-Reset
X-Drupal-Cache-Tags
X-Via-JSL
X-Cluster-Name
X-Origin-Upstream-Status
X-Request-Handler-Origin-Region
X-Microsite
X-Buckets
Referer-Policy
X-Oracle-Dms-Ecid
X-Cache-Age
X-Oracle-Dms-Rid
X-Contextid
Amp-Access-Control-Allow-Source-Origin
X-B-Cache
X-Signature
X-Logged-In
Cache-Status
X-Node-Name
X-Erf-Bev-Bev
X-Browser-Type
Refresh
X-Erf-Bev-Bev-Is-Generated
X-Mobile
X-Original-Request-Id
VIX-Pulpo-Upstream-Status
SD-X-WS
X-Response-Served-From
VIX-Pulpo-Node
X-Cache-Expired-At
X-Varnish-Backend
X-Page-View
X-Load-Cache
X-Vgn-Hpd-Reason
X-Real-IP
X-Cacheable-TTL
X-Debug
X-Rendered-As
Access-Control-Request-Headers
NGB
X-Is-Bot
X-Revision
X-Proxy-Cache-Status
X-IPLB-Instance
X-B
X-Jobs
X-ProcessESI
X-Instance
X-Device-Type
X-Rule
X-Yottaa-Metrics
X-RemovedCookies
X-Yottaa-Optimizations
X-Proxy
X-UUID
X-Cache-Action
X-Drupal-Cache-Contexts
X-Framework
X-Cache-Time
Akamai-GRN
X-Debug-IsConnected
Surrogate-Key
X-Debug-IsPreview
X-FW-Version
X-G
CF-IPCountry
SID
X-Accel-Buffering
GEO-INFO
X-Air-Trace-Id
X-Air-Source
X-Air-Hostname
DynaTrace
X-PressLabs-Stats
X-Oneagent-Js-Injection
X-Cache-NGX
Count-Hit
X-Nginx-Cache
X-Azure-Ref
Uber-Trace-Id
X-Cache-Operation
X-Presslabs-Stats
X-Source
X-Ms-Request-Id
X-Ms-Version
Liferay-Portal
X-RateLimit-Limit
X-XRDS-Location
X-Zen-Fury
Frame-Options
X-APP-VERSION
X-EdgeConnect-Cache-Status
X-CDN-Forward
X-TEC-API-ROOT
X-TEC-API-VERSION
X-TEC-API-ORIGIN
Ms-Operation-Id
MS-CV
Protected
X-RTag
X-Cache-Hit
Healthy
X-Backend-Name
X-Mode
X-Environment-Context
X-L-Path
Xserver
Ec-Rule-Version
X-IPS-LoggedIn
Cross-Origin-Window-Policy
Countrycode
X-Hyper-Cache
X-Tumblr-Pixel
X-Cache-TTL-Remaining
X-Tumblr-Pixel-0
X-Tumblr-User
X-Varnish-Server
X-Servername
X-Tumblr-Pixel-1
WPO-Cache-Status
WPO-Cache-Message
X-Trace-Id
X-Ratelimit-Remaining
Backend
X-Adobe-Content
X-Adobe-Loc
LB
X-SaId
X-RN-RSRV
X-UPSTREAM-Address
X-Detected-As
Content-Disposition
X-Tid
X-Rewrite-Enabled
X-JoinUs
X-Region
X-Content-Age
Meta-Geo
X-Debug-Cache
X-ShardId
X-Shopify-Stage
X-Sorting-Hat-PodId
X-Proxied
X-ShopId
X-Extlb
X-Redis-Cache
X-Format
X-Forwarded-Host
Decoy-Debug-Status
X-Hosted-By
X-Cache-Grace
X-Routing-Service
X-Generation-Time
X-Sorting-Hat-ShopId
Decoy-Debug-Key
X-Zipkin-Id
Decoy-Debug-TTL
Eomportal-Instance
X-Uri
X-Alternate-Cache-Key
X-Sql-Count
X-Sql-Duration-Ms
Apigw-Requestid
X-Cache-Server
Country-Code
Mn-Server-Ip
X-No-Session
CDN-Uid
X-Microcachable
X-NCache
X-Human
CDN-EdgeStorageId
X-Access
X-ApacheServer
X-OCL
CDN-Cache
CDN-CachedAt
CDN-RequestCountryCode
CDN-PullZone
Fastly-SSL
CDN-RequestId
X-PHP-Backend
X-ServerID
X-Origin-Date
X-FB-TRIP-ID
X-Via-Fastly
Url
X-Site-Version
X-Varnish-Beresp-Grace
X-PCL
X-PERF
Cache-Name
X-Section
TWC-Privacy
Webcakes-Region
Webcakes-App-Version
Webcakes-App-Name
Cache-Tv-Group
X-UA-Device-Type
X-Akamai-Edgescape
X-Say-TTL
X-SayCDN-TTL
Section-Io-Cache
X-Say-Cacheable
X-NYM-Debug-Backend
TWC-GeoIP-Country
TWC-Locale-Group
X-Web-Node
X-BYPASS-REASON
X-ProxyCache-Status
X-Pubstack
TWC-Connection-Speed
Selected-Fe
X-ProxyCache-Key
X-Origin-Hint
Property-Id
X-Proxy-Build
X-Server-W
X-Content-Powered-By
X-Cache-Host
TWC-GeoIP-LatLong
X-Timing-Wait
X-Storage
X-Cache-Type
X-Generated-By
X-Status
X-Cluster-Node
TWC-Device-Class
X-Varnishpool
X-R9-Blue-Green-Version
X-Soup
X-Be
X-Hl-Ver
Content-Secure-Policy
X-Ua
X-LSADC-Cache
Azure-SiteName
Azure-RegionName
Azure-InstanceId
Retry-After
Azure-Version
Azure-SlotName
DB-Nickname
X-NewRelic-App-Data
X-TIME
X-Nginx-Cache-Key
OT-Force-Account-Verify
X-Cache-Remote
X-Azure-Ref-OriginShield
X-Cached-By
X-Unique-Id
X-Bc-Bl
X-TT-LOGID
Source
X-Platform-Server
X-Auto-Login
X-Dc
X-Akamai-Transformed
Cache
SRV
X-Xfnlog-Site
X-GEO
X-LAGOON
Upgrade-Insecure-Requests
X-Cache-Tags
X-Cdn
ServedBy
HostName
X-Origin-TTL
X-Origin-CC
Mime-Version
X-Varnish-Cache-Hits
From-Origin
X-Varnish-Hits
Cache-Hits
X-HTML-Minification-Powered-By
X-App-Version
X-Varnish-Hostname
X-EC-Lua
X-CSRF-Token
X-TNCMS
X-Loop
X-Request-Time
X-Time
X-S-Maxage
X-AOL-HN
Onion-Location
Xet-Cookie
X-Request-Host
X-SRV
X-NWS-UUID-VERIFY
WP-Super-Cache
X-Xrds-Location
X-Tumblr-Pixel-2
Webserver
X-ECache
X-Tumblr-Pixel-3
Web-Mar-Node
N-Cache
X-Cache-Enabled
X-Proto
X-Handled-By
X-B3-SpanId
X-Amz-Meta-S3cmd-Attrs
X-FireWall-Port
X-Endurance-Cache-Level
Nel
X-Tenant
X-Correlation-ID
X-AWS-Id
X-LJ-Flow-ID
X-VWS-Id
X-Origin-Response-Time
Surrogated-Key
Rendered-Blocks
DCR-Decision-By
Redirect-Candidate
X-NAPM-TraceId
X-ND-Cache
Pramga
X-Ftr-Request-Id
X-Developer
Sslversion
X-SD-PageType
X-V-Cache
X-PAYTM-SRV-ID
A
X-Processor
X-Forwarded-Path
DCR-Processing-Time-Ms
X-Epic-Correlation-Id
S-Rt
X-GG-Cache-Date
Fastcgi-X-Cache-Version
X-Reqid
X-S-Cookie
X-ScT
X-Adobe-Source
Expiry
X-TIM-N
X-Shop-Environment
X-Slack-Backend
Meta-Geo-Continent
Odigeo-Trace-Id
X-Session-Fingerprint
X-Rojux
X-Destination
X-S
X-SRCache-Key
X-Gen-Mode
Mobile-Detection-Method
X-RCS-CacheZone
X-External-Request-Id
X-Vdms-Path
X-A-Wwc
X-Application
X-ARC
X-B-Cookie
X-A-Dgt
X-Planisys-CDN-TTL
X-Time-Microsecs
X-A
X-A-Ccd
X-A-Dam
X-A-Dcw
X-Backend-TTL
X-Block-Status
X-Orig-Expires
X-VG-WebCache
X-Ig-Push-State
X-Vtex-Remote-Cache
X-Vtex-Processado-Em
X-Planisys-CDN-Cache
Xc-Version
X-PBS-Appsvrname
X-Vdms-Version
X-Planisys-CDN-Rules
X-Cache-NE
BehaviorPad-Version
X-Aed
User-Cache-Control
V-Age
X-Ckpd-Fst-Backend
X-Conf
X-Hnp-Log
X-D
X-Connection-Hash
Vix-Hermes-Req-Id
X-Cluster
X-CF-Lambda-Version
X-CF-Lambda-Fn
X-MP-GENERATED-AT
X-Mg-Request-UUID
X-Magnolia-Registration
X-Edge-Location
State
DSUID
X-Li-Fabric
X-Server-IP
Origin
X-Cache-Info
X-Cache-Date
Cmstype
Cmsid
CDCHOST
X-Cdn-Srv
Svr
CacheControlHeader
X-Li-Pop
X-Gdpr
True-Client-Country-4JS
X-Rocket-Nginx-Serving-Static
Gh-Request-Id
Wxu-Next-Commit
Host-ID
X-Aicache-OS
X-Request-URI
X-Geo-Header
X-GeoIP-Country-Code
X-Scheme
X-Hash
X-Fastly-Cache
X-Cache-Bucket
Wxu-Next-Hostname
Wxu-Next-Region
X-GeoIP-Region-Code
X-Forwarded-Site
Fastcgi-Cache-TTL
X-LI-UUID
X-Nyt-Route
X-Policy
X-Sucuri-ID
X-SVT-ORM-RULES
X-NodeID
X-Sucuri-Cache
X-Men
X-Proxy-Upstream
X-Mvc-Supplant-Cachable
Arc-Country
X-Origin-Expires
X-Http-Reason
X-Origin
X-Origin-Time
X-Akamai-Request-ID2
X-VG-TLSProxy
X-Old-Content-Length
X-Webstats-RespID
X-Viewer-Country
X-Location
X-SVT-ORM-VERSION
Apple-News-Services-Handled
Apple-News-Services-Request-Url
AKAMAI
Apple-News-Services-Host
Apple-News-Services-Parsed-Url
X-PHP-Host
X-Locale
X-Via-NSCOPI
Environment
X-Cache-Var-Map
CloudFront-Viewer-Country
Server-Info
X-Amzn-RequestId
X-Cache-Var
X-Labrador-Cache-Channel
X-Amz-Apigw-Id
X-Served-From
X-Cache-Id
X-Cache-Debug
X-Branch-Name
X-Irp-Debug
X-Req
Ha-Gx-Prefs
X-Accel-Expires-Debug
Traceparent
Origin-EX
Origin-CC
X-Fastly-Backend
X-BBC-Edge-Cache-Status
X-Backend-State
Locid
X-Cdn-Origin
X-UnsetCookies
X-Eu-Site
X-Esi-Check
X-Varnish-Beresp-Status
X-Gamma-Serve
X-TrackingId
X-HN
X-Gzip
X-Owner
X-Generated-On
X-Envoy-Decorator-Operation
X-Region-Sid
X-Csrf-Jwt
X-Core-Value
X-Platform
X-VServer
X-Datadog-Parent-Id
X-Datadog-Sampling-Priority
X-Developers
X-VarnishDD-TTL
X-Date
X-Datadog-Trace-Id
X-CGP
X-Level-Front-Cache
Ssr
X-Storefront-Renderer-Rendered
X-Rocket-Build-Number
X-GeoIP-City
X-GeoIP
X-Skip-Cache
X-Sigma-Backend
Fastly-GeoIP-CountryCode
Server-Host
Release
Req-Svc-Chain
X-Core-Mission
X-Sigma
Fastly-Drupal-Html
PFcat
X-Fetched-On
X-Sn-Servicetimems
Web-Mar-Region
L5d-Success-Class
L
HA-Ipaddr
Machine
X-Device-Os
Magicmarker
X-Varnish-Beresp-Ttl
X-RateLimit-Remaining-Second
X-Restarts
Fastly-SIE
X-Worker
Fastly-SWR
Memcached
X-Rebelmouse-Surrogate-Control
Platform
Is-Eu
X-Tx-Id
NM-Fastcgi-Cache
X-HS-Content-Campaign-Id
Mail-Subject
X-RateLimit-Limit-Second
NGX
X-Response-By
Adler-Geo
X-Varnish-CookieHashed-On
X-Pod-Name
X-Is-Gdpr
X-Rebelmouse-Cache-Control
Thinkindot-CacheControl
X-DPWN-IS-SECURE
X-Has-Esi
X-Variation
TDXMobile
X-Varnish-CookieINHashed-On
We-Hiring
X-FC-Vary-Parameters
X-Thinkindot-L3
Thinkindot-CacheControl-Type
X-NU-AKA-ACS-Version
X-DefElseHash
X-TH-Server
X-Qloud-Router
X-Loc
X-Varnish-Remaining-TTL
X-JWT-State
Cf-Device-Type
X-DefHash
Thinkindot-Control
X-Amzn-Remapped-Content-Length
X-Ua-Device
X-Node-Id
X-ATG-Version
Kp-EeAlive
X-VC-Cache
X-CS
AMP-Access-Control-Allow-Source-Origin
X-Request-Start
X-Zone
X-M-Reqid
X-M-Log
X-Qnm-Cache
X-RSL
X-DW
X-RPM
Edge-Cache
X-Cache-Backend
CDN
X-Mvc-Supplant-OutputCached
X-Up
X-Wix-Viewer-Type
X-Thanos
X-DSS
X-RPS
X-LB-ID
X-DI
X-Action
X-Bip
X-DB
X-Srv
Accept-Language
X-NC
X-LB-NoCache
X-Trace-ID
Ms-Author-Via
X-API-Version
X-Generated-In
X-TraceId
Pics-Label
X-Cache-Config
X-Optimistic-Header
Env
X-Minions-Version
Memory
Time
X-CacheTTL
X-Tb-Optimization-Total-Bytes-Saved
X-Varnish-Ttl
WebServer
X-Via-Popn
X-Via-Poph
X-DC
X-Via-Popv
X-Edge-Pop
X-Refresh
X-Urbn-Site-Id
Locale
X-Urbn-Context-Path
X-Tt-Logid
X-HA-Backend
Candidate-Md5Url
GeoIp-Country-Code
Datacenter
NtCoent-Length
X-CACHE-KEY
X-ZONE
X-Datadome
X-Esi
X-Ec-Fail
X-User
X-TA-CDN-Provider
X-Ec-GeoHdr
Server-ID
X-Servedbyhost
X-DynaTrace-JS-Agent
X-Parent-Response-Time
X-MSEdge-Flight
X-Vc
WWW-Authenticate
X-MSEdge-Features
On-Server
X-CLOUD-TRACE-CONTEXT
X-Cs
Esi-Enabled
X-TX-ID
X-VCL-Version
X-Webkit-CSP-Report-Only
X-AK-Request-ID
Cdncip
X-Varnish-Beresp-TTL
Cdnsip
X-Unique-ID
X-Cache-Ttl
X-WADP-Cache
Cluster
My-App
X-Cache-PHP
X-Fpc
X-Fmm-Version
X-Clara-WADP
C-Via
X-Traceid
X-App
X-Service
X-LI-Proto
X-URL
X-CUA
X-Newrelic-Synthetics
Tracecode
X-Li-Proto
Geoip-Latitude
X-Dynatrace
X-Webkit-Csp-Report-Only
X-Var-Ttl
DataCenter
X-Pass-Why
Test
X-From
T-Server
Lfy
X-FPC
X-B3-Spanid
Proxy-Connection
X-NODE
Cf-Int-Pingora-Origin-Digest
Lang
X-Fragments
Fastly-Drupal-HTML
X-Render-Time
X-Cache-Status-Check
X-VC
X-Vcl-Version
X-Mcache
X-LiteSpeed-Cache-Control
Geo-Info
Resin-Trace
Target-Params
M-TraceId
Server-Id
X-WP-CF-Super-Cache-Cache-Control
X-WP-CF-Super-Cache
X-CSRF-TOKEN
X-Ha-Backend
X-Provided-By
X-RAMCache
GeoIP-Country-Code
X-ID
MIME-Version
Hostname
X-Httpd
X-Proxy-Cache-Info
X-ServedByHost
Hit
Permissions-Policy
X-Api-Version
X-Clientip
X-Geo
X-Dynatrace-Js-Agent
X-Via-PopN
X-Via-PopV
X-Cdn-Forward
WZWS-RAY
X-Via-PopH
X-Edge-POP
X-Oss-Storage-Class
X-Oss-Server-Time
X-LiteSpeed-Tag
X-Oss-Request-Id
Producers
UCS
HIT
X-Oss-Object-Type
X-Oss-Hash-Crc64ecma
Servername
X-Pad
X-RateLimit-Reset
Cache-Host
X-AIR-PT
X-Info
X-Fastly-Backend-Reqs
X-SB
FSS-Cache
Section-Io-Origin-Status
Section-Io-Id
X-Edge-Cache
X-NGINX-Cache
ENV
Section-Io-Origin-Time-Seconds
S-Cnection
Section-Origin-Responded
X-Udemy-Cache-App-Namespace
X-Check-Cacheable
X-ElasticPress-Query
X-Ucs
Ohc-File-Size
X-Platform-Cluster
X-Pool
X-Platform-Processor
X-Platform-Router
X-BBC-Origin-Response-Status
X-Acquia-Purge-Tags
X-Scale
X-Acquia-Site
X-Acquia-Application-UUID
X-UP
X-Nc
X-Micro-Cache
Fastly-Backend-Name
URI
X-Acquia-Application-Trace
X-HS-Status
User-Agent
X-Cache-CFC
PICS-Label
X-Lb-Nocache
X-Ec-Custom-Error
Uri
X-GoCache-CacheStatus
ServerName
X-MG-S
X-Srcache-Store-Status
X-Srcache-Fetch-Status
X-Dispatcher-Number
Cteonnt-Length
X-SIPLIST1
Server-Ext
Cneonction
IsBot
X-Release
MD5-Digest
Server-Ttl
Sever-Int
Server-Hostname
X-Cache-Expires
X-Swift-Error
X-Cdn-Request-ID
Load-Balancing
X-Backend-Host
X-ServerName
X-Lb-Id
X-Fastly-Cache-Hits
Tcn
X-Dw-Trace-Id
X-Snapshot-Date
Shield-Pop
X-Akamai-ERRuleID
Vha6-Origin
CF-Cached-On
X-APP
X-BCube-Filmed-By
X-B3-ParentSpanId
X-Cache-ASPX
X-Via-Ucdn
X-Yottaa-OS
X-Akamai-ERPolicy
X-Contensis-Viewer-Groups
X-Newrelic-App-Data
Cf-Ipcountry
X-TRACE-ID
Wpo-Cache-Message
X-Vcache
EpKe-Alive
Wpo-Cache-Status
X-HostName
Cdn
X-Cache-Ngx
X-Air-Pt
Sid
X-Shopify-Generated-Cart-Token
X-Fetch-By
X-Cms-Context
X-Litespeed-Cache-Control
X-IN-APIGATEWAYSSL
X-IN-APIGATEWAY
Ohc-Cache-HIT
Path
X-B3-Parentspanid
GeoIP-Latitude
X-Varnish-Authentication
CountryCode
X-Http-Count
X-Http-Duration-Ms
X-Apw-Hits
X-Sentry-ID
Ngx
X-Apw-Access-Object
X-Apw-Access-Action
X-Te-Count
X-Te-Duration-Ms
X-UA
X-CacheKey
X-Akamai-Request-ID
X-Apw-Access-Token
X-Akamai-Pragma-Client-IP
Req-ID
X-Last-Modified
X-Logging-Id