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