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