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