Threat Level: green Handler on Duty: Yee Ching Tok

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
X-Frame-Options
Expires
Strict-Transport-Security
Content-Length
X-Content-Type-Options
Link
Accept-CH
Last-Modified
X-XSS-Protection
CF-Cache-Status
ETag
Expect-CT
Accept-Ranges
CF-RAY
Pragma
X-Powered-By
X-Cache
Via
Age
Content-Security-Policy
Alt-Svc
Report-To
NEL
Referrer-Policy
Access-Control-Allow-Origin
Content-Language
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-Cache-Hits
P3P
X-UA-Compatible
X-Served-By
X-Download-Options
X-Timer
X-Request-Id
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Varnish
X-Adblock-Key
X-Permitted-Cross-Domain-Policies
X-Xss-Protection
Cf-Request-Id
Access-Control-Allow-Credentials
CF-Ray
Accept-CH-Lifetime
X-DNS-Prefetch-Control
Content-Security-Policy-Report-Only
X-AspNet-Version
X-Runtime
Permissions-Policy
Server-Timing
X-Drupal-Cache
X-Generator
X-Envoy-Upstream-Service-Time
X-Cache-Status
X-Ua-Compatible
X-Cacheable
X-Iinfo
X-FRAME-OPTIONS
X-Drupal-Dynamic-Cache
Timing-Allow-Origin
Feature-Policy
X-Content-Security-Policy
X-CONTENT-TYPE-OPTIONS
Xkey
Upgrade
X-CDN
Access-Control-Expose-Headers
Content-Encoding
Status
X-XSS-PROTECTION
X-AspNetMvc-Version
Access-Control-Max-Age
Accept-Ch
X-Request-ID
Host-Header
X-Amz-Request-Id
X-Age
X-Amz-Id-2
Request-Context
Cf-Edge-Cache
X-Backend
X-Robots-Tag
X-Hacker
X-Via
Cf-Apo-Via
Keep-Alive
X-Turbo-Charged-By
X-Amz-Version-Id
X-AH-Environment
X-Rq
X-Cache-Group
X-Vhost
X-Dispatcher
X-Server
X-Proxy-Cache
EagleId
X-Ws-Request-Id
X-UA-Device
CONTENT-SECURITY-POLICY
X-Varnish-Cache
Pantheon-Trace-Id
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-OneAgent-JS-Injection
Grace
X-Server-Powered-By
X-Pingback
Allow
X-Page-Speed
X-WebKit-CSP
X-Litespeed-Cache
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-Swift-SaveTime
X-Swift-CacheTime
Ali-Swift-Global-Savetime
X-Dns-Prefetch-Control
X-FTR-Request-ID
X-Node
X-Device
EagleEye-TraceId
X-Server-Id
X-Cache-Lookup
X-Host
X-Country-Code
X-Backend-Server
Surrogate-Control
X-LiteSpeed-Cache
X-Cloud-Trace-Context
X-Readtime
X-Akam-SW-Version
Cf-Railgun
X-HW
X-Ruxit-JS-Agent
X-Response-Time
Cache-Tag
X-Amz-Server-Side-Encryption
Content-Location
P3p
Cross-Origin-Opener-Policy
X-Rack-Cache
X-Nginx-Upstream-Cache-Status
X-Trace
Service-Worker-Allowed
X-Nginx-Cache-Status
X-Ua-Device
Request-Id
X-TraceId
Fastly-Restarts
X-Application-Context
X-Content-Type
X-Clacks-Overhead
Rating
X-Times
X-PC
X-Vname
X-TtlSet
X-Cnection
X-Country
X-ESI
X-Country-Code-Real
X-Edge
X-Mcache
X-Midtier
X-FTR-Backend-Server
X-FTR-Backend
X-FTR-Cache-Status
X-FTR-Balancer
X-Browser-Type
X-Cache-TTL
X-FTR-Expires
Edge-Control
X-Vcap-Request-Id
Origin-Trial
Surrogate-Key
X-Nf-Request-Id
X-Powered-By-Plesk
X-Ac
Accept-Ch-Lifetime
X-FastCGI-Cache
X-Abt-Application-Version
X-Exp-Id
X-Element-Page-Cache
X-Cdn-Fetch
X-GoogleNews-Bot
X-Kinja-Server
X-Kinja-Revision
X-Kinja-Build
X-Kinja
X-Exp-Variant
X-NWS-LOG-UUID
X-D2id
Verso
X-Oneagent-Js-Injection
X-B3-TraceId
X-Upstream
X-ECACHE
X-Mod-Pagespeed
X-ORACLE-DMS-RID
X-Amz-Rid
X-Navigation-Version
Nginx-Cache
X-Pinterest-Rid
Pinterest-Generated-By
Pinterest-Version
Display
Pagespeed
X-Middleton-Display
Akamai-GRN
X-Sol
X-Language
X-GitHub-Request-Id
X-Envoy-Decorator-Operation
X-Middleton-Response
X-PDP-UNCACHING-HASH
X-Server-Lifecycle-Phase
Response
X-Erf-Bev-Bev
X-Erf-Bev-Bev-Is-Generated
X-Kraken-Loop-Name
X-Instrumentation
S
AR-PoweredBy
AR-Request-ID
AR-ATIME
Edge-Cache-Tag
X-Url
X-Ratelimit-Limit
X-MS-InvokeApp
X-Goog-Hash
X-Client-IP
X-Resp-Is-Stale
X-Kinsta-Cache
X-Edge-Location-Klb
X-ARC
X-Distributor
X-Ser
X-Ruxit-Js-Agent
X-SharePointHealthScore
SPRequestDuration
SPRequestGuid
SPIisLatency
X-NGENIX-Cache
X-Ttl
X-Content-Digest
Access-Control-Request-Method
Front-End-Https
X-Shield-Request-Id
X-Ezoic-Cdn
X-Dw-Request-Base-Id
X-Recruiting
RTSS
X-Cache-Key
X-Amzn-Trace-Id
X-Varnish-TTL
X-Version
Cache-Status
X-Powered-CMS
X-Mg-S
Public-Key-Pins
X-T
X-MSEdge-Ref
TP-Cache
Fastcgi-Cache
X-Accel-Expires
X-HS-Cache-Config
X-HS-Hub-Id
X-HS-Content-Id
Arr-Disable-Session-Affinity
X-Daa-Tunnel
Realpath
X-Ismobilevalue
Cache-Tags
X-Cluster-Name
X-Correlation-Id
AR-CACHE
X-Id
X-Fastly-Request-ID
X-Cached
X-Forwarded-For
X-Content-Security-Policy-Report-Only
X-HS-Combine-CSS
X-Newrelic-App-Data
X-Request-Received
X-Request-Processing-Time
Content-MD5
X-DIS-Request-ID
X-Kong-Upstream-Latency
Payment
X-Kong-Proxy-Latency
X-Ua-Browser
X-GUploader-UploadID
X-HS-CF-Cache-Status
X-HS-Prerendered
X-Azure-Ref
X-HP-Trace-Id
X-Jurisdiction
X-HP-Webp
X-Cambria-Cache-Control
X-RateLimit-Remaining
X-Ratelimit-Remaining
Content-Disposition
YJS-ID
X-Amz-Replication-Status
Count-Hit
X-Server-Name
X-Xrds-Location
X-CST
Ar-SID
X-SERVER-NAME
X-Webkit-Csp
X-Px
X-Unique-Id
X-Page-Id
X-SRCache-Fetch-Status
X-SRCache-Store-Status
Accept-Charset
Cleartype
X-Origin-Server
Cross-Origin-Resource-Policy
Cross-Origin-Embedder-Policy
X-Ratelimit-Reset
X-TTL
X-VARITI-CCR
X-Proxy
X-FB-Debug
X-Logged-In
X-Microsite
X-Request-Handler-Origin-Region
X-Protected-By
X-Activity-Id
X-AppVersion
X-Az
X-Rid
X-Git-Hash
X-Www-Served-By
X-LLID
X-Goog-Metageneration
X-ORACLE-DMS-ECID
X-Amz-Meta-S3cmd-Attrs
X-COUNTRY
X-Load-Cache
MicrosoftSharePointTeamServices
X-Request-Device-Id
X-Template
Version
X-Varnish-Backend
X-TEC-API-VERSION
X-TEC-API-ORIGIN
X-TEC-API-ROOT
X-Forwarded-Proto
X-Amz-Apigw-Id
X-Amzn-RequestId
X-Geo-Country
Server-Node
X-Upgrade-Enabled
Server-Name
X-PressLabs-Stats
X-Hits
X-Hostname
X-B3-Sampled
X-Meli-Trace-Site
X-Content-Options
X-Meli-Trace-Bu
X-Meli-Trace-Platform
X-Frontend
Section-Io-Cache
Viewport
X-App-Server
X-TT
X-Varnish-Grace
MRF-Tech
X-Grace
Mrf-Cache-Status
X-B3-TraceId-Primal
X-Varnish-Server
X-Device-Type
Fastly-SWR
Fastly-SIE
Alternate-Protocol
X-B
X-Fb-Rlafr
Access-Control-Allow-Method
X-Status
X-URL
Healthy
TCN
X-Goog-Stored-Content-Encoding
X-Goog-Storage-Class
X-Goog-Stored-Content-Length
X-Goog-Generation
X-Request-Guid
X-WebKit-CSP-Report-Only
Upgrade-Insecure-Requests
DC
Host
X-Magnolia-Registration
X-CSRF-Token
Amp-Access-Control-Allow-Source-Origin
X-EdgeConnect-Cache-Status
X-Tt-Trace-Tag
X-Tt-Trace-Host
X-Contextid
Retry-After
X-Amzn-Remapped-Content-Length
X-Buckets
X-Cache-Control
X-Debug
MS-Author-Via
X-Varnish-Ttl
X-Cache-Age
AKAMAI-GRN
X-Revision
X-Type
X-App-Version
X-Origin-CC
X-Oracle-Dms-Ecid
X-Origin-TTL
X-Original-Request-Id
X-Vcl-Version
X-Response-Served-From
X-Instance
X-N
X-Yottaa-Metrics
X-WP-CF-Super-Cache
X-Yottaa-Optimizations
X-WP-CF-Super-Cache-Cache-Control
X-Seen-By
X-Adobe-Content
Frame-Options
X-Is-Bot
X-Akamai-Edgescape
X-Rendered-As
X-NYM-Debug-Backend
X-Adobe-Loc
X-Lambda-Id
X-Backend-Name
Cross-Origin-Embedder-Policy-Report-Only
Cross-Origin-Opener-Policy-Report-Only
SD-X-WS
X-G
X-Akamai-Request-ID2
Section-Io-Id
Access-Control-Request-Headers
X-INCAP-ABP
X-Tumblr-Pixel-1
X-Tumblr-Pixel
X-RM-Cache-TTL
X-Debug-IsPreview
X-Tumblr-User
X-Hl-Ver
X-Debug-IsConnected
X-Server-W
X-Tumblr-Pixel-0
X-Trace-Id
X-ServerID
X-UUID
X-Mg-Request-UUID
X-Content-Powered-By
Charset
X-AB
X-Storage
X-Framework
NGB
X-DataDome
X-Dc
MS-CV
X-Cache-Status-Check
X-RemovedCookies
X-RTag
X-ProcessESI
Ms-Operation-Id
VIX-Pulpo-Upstream-Status
VIX-Pulpo-Node
X-Requestid
X-Mobile
X-B3-SpanId
Filterid
X-Request-Site
X-Cache-Hit
Accept-Language
X-Request-Platform
X-Request-Bu
X-Cache-Time
Cache
Webserver
Refresh
X-Tec-Api-Origin
X-HITS
X-Tec-Api-Version
X-Tec-Api-Root
X-NF-Request-ID
SRV
X-Time
X-Fastcgi-Cache
X-Server-ID
X-Region
AR-SID
Paypal-Debug-Id
X-Ms-Request-Id
X-Ms-Version
X-Real-IP
X-Wormhole-Sdk
X-Node-Name
X-VC-Cache
Onion-Location
CDN-RequestId
X-User-Agent
X-F-Cache
X-Hcs-Proxy-Type
X-CCDN-Origin-Time
X-CCDN-CacheTTL
Protected
Liferay-Portal
Cross-Origin-Window-Policy
X-IPS-LoggedIn
Priority
X-Cache-Expired-At
X-Rocket-Nginx-Serving-Static
X-Pass-Why
X-HTML-Minification-Powered-By
X-LB-Cache
X-Whom
Xet-Cookie
X-Environment-Context
X-Yandex-Req-Id
X-L-Path
GEO-INFO
X-XRDS-Location
X-Datadog-Sampled
X-Datadog-Trace-Id
X-Mode
X-Datadog-Parent-Id
X-Datadog-Sampling-Priority
Backend
X-Service
X-Drupal-Cache-Tags
OT-Force-Account-Verify
X-Tb
X-WP-CF-Super-Cache-Active
Country
X-Proxy-Cache-Info
X-Handled-By
X-App-Environment
YJS-CacheStatus
X-Is-Desktop
X-Is-Mobile
X-Tcp-Rtt
Filters
Meta-Geo
TWC-Connection-Speed
Property-Id
X-Servername
X-Tncms
X-Is-Tablet
LB
X-Loop
X-JoinUs
ServerID
X-UPSTREAM-Address
TWC-Device-Class
X-Rn-Rsrv
X-Vcache
TWC-GeoIP-City
X-Browser-Name
X-Geo-Region
X-Adobe-Source
Webcakes-Region
X-Cloudmap
X-Detected-As
X-SaId
X-FB-TRIP-ID
X-Extlb
Webcakes-App-Version
Webcakes-App-Name
TWC-GeoIP-LatLong
TWC-GeoIP-DMA
TWC-GeoIP-Country
TWC-GeoIP-Region
TWC-Locale-Group
Web-Mar-Node
Url
TWC-Privacy
X-MP-GENERATED-AT
X-Is-Supported-Browser
X-Zipkin-Id
X-Rewrite-Enabled
X-Proxied
X-Routing-Service
X-Origin-Hint
X-Origin-Date
X-Logging-Id
X-Shopify-Stage
X-Director
X-Storefront-Renderer-Rendered
X-Hit
X-Wix-Request-Id
ServedBy
X-Httpd
DB-Nickname
X-Cacheable-TTL
X-Varnish-Beresp-Grace
X-Cache-Host
X-Alternate-Cache-Key
Mn-Server-Ip
X-Hosted-By
X-Fetched-On
X-Cache-Action
Atl-Traceid
X-Forwarded-Host
X-IPLB-Request-ID
X-Format
X-Web-Node
X-Restarts
X-IPLB-Instance
X-FW-Serve
X-Urbn-Context-Path
X-Skip-Cache
X-FW-Static
X-Cdn-Origin
X-Cluster-Node
X-Say-Cacheable
X-FW-Version
X-Cms-Context
Locale
X-FW-Type
X-FW-Dynamic
Uber-Trace-Id
X-Urbn-Site-Id
X-Soup
X-FW-Server
X-Say-TTL
X-ProxyCache-Key
Environment
X-Locale
X-Cluster
X-Rule
X-Redis-Cache
X-Generation-Time
Apigw-Requestid
X-SayCDN-TTL
X-ProxyCache-Status
X-Edge-Location
X-BYPASS-REASON
X-FW-Hash
X-Scope-Id
X-Is-Modern-Browser
X-RateLimit-Remaining-Second
X-RateLimit-Limit-Second
X-Labrador-Cache-Channel
X-RCS-CacheZone
X-Drupal-Cache-Contexts
X-S
X-Endurance-Cache-Level
X-Debug-Info
X-PHP-Host
X-Auth-Group-Type
X-Origin
X-Connection-Hash
Selected-Fe
X-Tumblr-Pixel-3
Cache-Hits
X-Origin-Cache
Expiry
X-Served-From
X-Timing-Wait
X-Tumblr-Pixel-2
X-Proxy-Build
X-ECache
X-VCT
X-Mly-Id
X-Cache-Debug
Fastcgi-Useragent
X-GEO
X-ShardId
X-ShopId
X-Sorting-Hat-PodId
X-Sorting-Hat-ShopId
X-Provided-By
X-VC
X-UA
X-R9-Blue-Green-Version
X-Is-Mobile-Only
Front
X-No-Session
X-NewRelic-App-Data
Node
X-Varnish-Cache-Hits
X-CDN-Forward
X-Presslabs-Stats
Xserver
X-Lagoon
X-Platform
Cache-Tv-Group
X-Varnish-Age
X-Varnish-Beresp-Ttl
X-WP-CF-Super-Cache-Cookies-Bypass
X-CLOUD-TRACE-CONTEXT
X-Generated-By
WPO-Cache-Status
X-CDN-Cache-Status
X-Api-Version
X-CACHE-AGE
Countrycode
X-SRV
X-Webstats-RespID
X-B-Cache
Referer-Policy
X-Tt-Logid
X-Signature
From-Origin
Cache-Provider
X-Site-Version
X-Optimistic-Header
X-NWS-UUID-VERIFY
X-B3-Traceid
X-Azure-Ref-OriginShield
X-TA-CDN-Provider
X-Source
X-Accel-Version
X-Cache-Rule
X-Cache-Operation
X-PHP-Backend
X-VC-TTL
Request-ID
X-Ua
X-Tx-Id
X-IsAdmin
CF-IPCountry
X-Sucuri-Cache
X-Worker
Location
X-Xfnlog-Site
X-Auto-Login
X-Tb-Optimization-Total-Bytes-Saved
CDN-EdgeStorageId
CDN-RequestPullCode
CDN-RequestPullSuccess
CDN-RequestCountryCode
CDN-PullZone
AMP-Access-Control-Allow-Source-Origin
CDN-CachedAt
CDN-Uid
CDN-Cache
WPO-Cache-Message
Wxu-Next-Region
X-A
X-A-Ccd
X-BCube-Filmed-By
Wxu-Next-Hostname
Wxu-Next-Commit
RNT-Time
Sslversion
Web-Mar-Region
X-A-Dam
RNT-Machine
X-A-Dcw
X-Application
X-ApacheServer
X-AK-Request-ID
X-Aed
X-B-Cookie
Rendered-Blocks
X-A-Dgt
X-A-Wwc
X-Access
X-Action
N-Cache
DCR-Decision-By
DCR-Processing-Time-Ms
Expect-Staple
Fastly-SSL
Cdnsip
Cdncip
Apple-News-Services-Host
Apple-News-Services-Parsed-Url
Apple-News-Services-Request-Url
Candidate-Md5Url
Fl-Custom-Application
Host-ID
X-Bl-Debug
Ngx.Var.Host
Odigeo-Trace-Id
Origin
Meta-Geo-Continent
MD5-Digest
IsBot
Lang
Log-Origin
Redirect-Candidate
X-Content-Age
X-ScT
X-Section
X-Sigma
X-Sigma-Backend
X-S-Cookie
X-Rojux
X-Origin-Expires
X-PERF
X-Request-URI
X-Rocket-Build-Number
X-SIPLIST1
X-Slack-Backend
X-VG-TLSProxy
X-VG-WebCache
X-Vtex-Remote-Cache
Xc-Version
X-Vdms-Version
X-Varnish-Director
X-Slack-Shared-Secret-Outcome
X-SRCache-Key
X-V-Cache
X-Varnish-Authentication
X-Old-Content-Length
X-Micro-Cache
X-Developer
X-Ec-Fail
X-Ec-GeoHdr
X-External-Request-Id
X-Depends
X-D
X-Cache-NE
X-Conf
X-Contensis-Viewer-Groups
Apple-News-Services-Handled
X-Fmm-Version
X-Forwarded-Site
X-HS-Content-Campaign-Id
X-Ig-Origin-Region
X-Ig-Push-State
X-Loc
X-Hash
X-GeoIP-City
X-From
X-GeoCode
X-GeoCountry
X-Cache-Aspx
X-Destination
X-Fastly-Request-Id
X-AWS-Id
Origin-Agent-Cluster
X-VWS-Id
X-LJ-Flow-ID
X-Reqid
X-Sucuri-ID
X-Varnish-CookieHashed-On
X-Varnish-Hostname
X-Varnish-CookieINHashed-On
X-Bc-Bl
X-Backend-Instance
X-BBC-Edge-Cache-Status
X-Block-Status
X-Clientip
X-Cms-Device
X-Content-Length
X-UA-Device-Type
X-Up
X-App-Name
X-Uri
X-Core-Value
X-Aicache-OS
X-Viewer-Country
Store-Cloud-Cache
ServerName
X-We-Are-Hiring
Release
Req-Svc-Chain
Time-Cloud-Cache
User-Cache-Control
X-CUA
X-Akamai-Device-Characteristics
X-Acquia-Purge-Cdn-Unconfigured
X-Vary-Devices
V-Age
X-PAYTM-SRV-ID
X-Varnish-Remaining-TTL
X-DefElseHash
X-Internal-TTL
X-Save-Cache
X-Level-Front-Cache
X-Human
X-SD-PageType
X-GoCache-CacheStatus
X-Hnp-Log
X-Men
X-Req
X-Node-Id
X-Org
X-Path
X-NMSegId
X-Moov-Xdn-Version
X-Moov-T
X-Moov-Xdn-Caching-Status
X-GeoIP-Region-Code
X-GeoIP-Country-Code
X-Ee-Generated-By
X-Ee-Origin
X-Ee-Request-Date
X-Ec-Custom-Error
X-LSADC-Cache
Origin-Site
X-DefHash
X-Ee-Request-Id
X-Epic-Correlation-Id
X-Generated-On
X-Sn-Servicetimems
X-Gen-Mode
X-Gamma-Serve
X-Air-Pt
X-Fastly-Backend
X-Date
X-Accel-Expires-Debug
Cmstype
L
Pragrma
Cmsid
Cluster
L5d-Success-Class
X-CGP
Country-Code
S-Rt
Ha-Gx-Prefs
X-Csrf-Jwt
Gh-Request-Id
X-Pubstack
X-Eu-Site
X-FC-Vary-Parameters
X-Varnish-Beresp-Status
Azure-InstanceId
Origin-EX
NM-Fastcgi-Cache
X-Frame-Option
Gannett-Cam-Experience-Id
Origin-CC
Azure-Version
Azure-SiteName
Azure-SlotName
X-Policy
DSUID
Azure-RegionName
X-Bug-Bounty
CDCHOST
Source
X-Litespeed-Cache-Control
X-Thinkindot-L1
X-CacheTTL
X-Cache-Date
We-Hiring
Content-Script-Type
X-Cache-FS-Status
Content-Style-Type
X-Thinkindot-L3
X-Op-Id-All
X-Cache-Id
X-DPWN-IS-SECURE
Cache-Contol
CacheControlHeader
X-Gdpr
X-Region-Sid
C-Via
X-Nyt-Route
X-Gzip
X-Server-IP
X-Shield-Cache-Expires
X-SVT-ORM-RULES
Cdn-Host
X-Edge-Server
X-SVT-ORM-VERSION
X-Dispatcher-Server
X-Debug-Cache-Store
Click-Count-Error
Click-Count-Action-Start
Cdn-Request-Time
X-Esi-Check
X-Mvc-Supplant-Cachable
X-Debug-Cache-Fetch
Fastly-Backend-Name
X-Origin-Time
X-Via-Fastly
Powered-By
RewriteTestHook
X-Vercel-Id
RewriteTeamHook
Machine
X-Vercel-Cache
XM
Tube-Return
Thinkindot-CacheControl-Type
Nord-Request-ID
TDXMobile
X-Vmg-Version
Tube-Get-Contents
Tube-Got-Results
Server-Host
Tube-Got-Eval
Thinkindot-CacheControl
X-AB-Test
X-Ion-Healthy
X-Ion-Hop
X-SB
X-B3-Trace-ID
Platform
PFcat
Mail-Subject
Producers
X-Jungle-Id
X-VarnishDD-TTL
X-Wikidot-Backend
X-Wikidot-Static-Cache
X-HN
X-Render-Time
Fastly-GeoIP-CountryCode
X-Amz-Storage-Class
X-Client-Ip
X-NGINX-Cache
X-Parent-Response-Time
Fastly-Drupal-HTML
X-Cs
X-Proto
X-FORWARDED-FOR
Canary
X-Origin-Response-Time
X-Bip
X-Mvc-Supplant-OutputCached
X-Location
X-Proxied-Request
X-TT-LOGID
X-Thanos
Vix-Hermes-Req-Id
X-Upstream-Ct
X-Upstream-Ht
X-ND-Cache
X-ElasticPress-Query
Pics-Label
CloudFront-Viewer-Country
X-Pad
Sid
NGX
X-Refresh
X-Nananana
X-ZONE
Debug
X-Via-Popn
X-Via-Poph
X-APP
X-Via-Popv
X-Cached-By
X-Servedbyhost
Product
Mime-Version
GeoIP-Latitude
X-HA-Backend
X-Varnish-Hits
X-TH-Server
X-Srv
X-Litespeed-Tag
GeoIp-Country-Code
Server-ID
Cookie
X-Amz-Meta-Cb-Modifiedtime
HA-Ipaddr
X-AIR-PT
MIME-Version
X-DynaTrace-JS-Agent
X-Datadome
X-Cache-VC
X-Zone
X-User
X-Wa
X-Nginx-Cache-Key
X-Nc
X-Debug-Service
X-Fpc
Edge-Cache
X-GeoIP
SID
X-Cdn-Forward
Load-Balancing
X-Webkit-CSP
X-LB-ID
Sever-Int
True-Client-Country-4JS
Server-Ext
Server-Hostname
X-B3-Parentspanid
Cdn
HostName
WZWS-RAY
Show-Do-Not-Sell-Link
X-Nginx-Cache
X-Vc
Akamai-Mon-Iucid-Del
X-Cache-Backend
Resin-Trace
X-Unity-Cache
X-LB-NoCache
DataCenter
Traceparent
Fastly-Drupal-Html
X-Newrelic-Synthetics
X-Request-Start
X-Scheme
Surrogated-Key
Tcn
X-Ez-Minify-Html
X-Lsadc-Cache
X-VCL-Version
X-Pool
Wsr-Cache
X-Service-Response-Time
Lb
X-CS
Sm-Log-Id
X-B3-Spanid
Serverhost
X-CDN-Provider
Yjs-Id
X-Request-Host
X-NodeID
X-LiteSpeed-Cache-Control
X-RequestId
Hostname
N1-Cache
X-API-Version
X-Vgn-Hpd-Reason
XkeyR9
Xkey-La3
X-Proxy-Cache-La3
Xkeylog
X-TX-ID
X-Cache-Grace
X-Datacenter
NtCoent-Length
X-Proxy-CacheR9
X-HOST
CountryCode
Datacenter
A
X-RateLimit-Limit
X-LiteSpeed-Tag
X-DataCenter
X-DynaTrace
Yak-Timeinfo
X-HubSpot-Correlation-Id
Edge-Copy-Time
Cdn-Requestid
X-Udemy-Cache-App-Namespace
X-Lb-Id
X-Via-SSL
X-Via-Edge
X-Via-CDN
X-Akamai-Pragma-Client-IP
CDN
X-Dynatrace-Js-Agent
X-WA
Uri
X-Air-Hostname
X-Air-Trace-Id
Cs
X-Air-Source
X-Geolocation
X-Fastly-Backend-Reqs
X-NC
X-FPC
X-Stale
X-Jobs
Esi-Enabled
X-ID
X-Zen-Fury
X-Html-Minification-Powered-By
Req-ID
Server-Id
X-Via-JSL
True-Client-IP
GeoIP-Country-Code
WP-Super-Cache
T-Server
X-Srcache-Fetch-Status
X-Cdn-Srv
X-Ez-Minify-Js
Cr
On-Server
X-HA-Application-Name
Proxy-Firewall
X-TimeS
X-Srcache-Store-Status
X-VC-Age
X-HA-Bot-Classification
X-Styx-Origin-Id
X-Styx-Info
X-AC
X-HA-Device-Type
Geoip-Latitude
RATING
Pramga
Srv
From-Cache
X-Lb-Nocache
X-ServedByHost
X-Webkit-Csp-Report-Only
X-Varnish-Beresp-TTL
X-Swift-Error
X-Powered-By-VTEX-Cache
ServerHost
X-VTEX-Cache-Time
Content-Secure-Policy
X-VTEX-Cache-Server
X-Var-Ttl
X-TIM-N
X-Oracle-DMS-ECID
X-MSEdge-Flight
X-MSEdge-Features
Cloudfront-Viewer-Country
X-CSRF-TOKEN
X-App
X-Ha-Backend
W
X-CACHE-KEY
X-LAGOON
X-Wp-Cf-Super-Cache
X-Wp-Cf-Super-Cache-Cache-Control
X-Proxy-Cache-LA2
Cl-Cache
X-Ramcache
X-Elasticpress-Query
X-Ssense-Shipping-Surcharge-Enabled
FSS-Cache
X-Ssense-Gql
X-Via-PopN
Coldstone-Viewer-Country-Region-Name
Coldstone-Viewer-Country
X-Via-PopH
Coldstone-Viewer-Currency
Ngx
X-Correlation-ID
X-WA-Info
X-Via-PopV
X-Fastly-Cache
WebServer
X-Wp-Cf-Super-Cache-Active
X-Wp-Cf-Super-Cache-Cookies-Bypass
X-Sorting-Hat-Shopid
X-Shopid
X-Cdn-Cache-Status
X-Geo
X-Shardid
X-Sorting-Hat-Podid
X-Web-Server
CF-Cached-On
X-Check-Cacheable
X-Request-Url
X-Sucuri-Id
X-Th-Server
X-ATG-Version
Ohc-Cache-HIT
X-Serial
X-DC
BehaviorPad-Version
X-Key
X-VServer
Akamai-X-True-TTL
Ohc-File-Size
Cf-Ipcountry
X-Cache-TTL-Remaining
Warning
Xkey-G-Jp
FSS-Proxy
X-Request-Time
X-Fastly-Cache-Hits
X-Env
X-Fastly-Cache-Status
Cneonction
X-Mg-Cache
Host-Name
User-Agent