Threat Level: green Handler on Duty: Rob VandenBrink

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