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