Threat Level: green Handler on Duty: Russ McRee

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