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
CF-RAY
Expect-CT
Accept-Ranges
X-XSS-Protection
Pragma
X-Powered-By
X-Cache
Via
Age
Content-Security-Policy
Report-To
NEL
Alt-Svc
Referrer-Policy
Access-Control-Allow-Origin
Content-Language
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-Cache-Hits
P3P
X-Xss-Protection
X-UA-Compatible
X-Served-By
X-Download-Options
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Request-Id
X-Varnish
X-Adblock-Key
X-Permitted-Cross-Domain-Policies
Access-Control-Allow-Credentials
X-DNS-Prefetch-Control
Content-Security-Policy-Report-Only
Accept-CH
X-Runtime
Accept-CH-Lifetime
X-AspNet-Version
X-Drupal-Cache
X-Check
X-Generator
X-Cache-Status
X-Ua-Compatible
Server-Timing
X-Cacheable
X-Request-ID
Timing-Allow-Origin
X-Envoy-Upstream-Service-Time
X-FRAME-OPTIONS
X-Iinfo
X-Drupal-Dynamic-Cache
X-Content-Security-Policy
Feature-Policy
Access-Control-Expose-Headers
Content-Encoding
X-CDN
Upgrade
Status
X-AspNetMvc-Version
CF-Ray
Access-Control-Max-Age
X-Amz-Request-Id
Cf-Edge-Cache
X-Amz-Id-2
X-Via
Host-Header
EagleId
Permissions-Policy
Keep-Alive
Request-Context
X-Cache-Group
X-Backend
X-Robots-Tag
X-UA-Device
X-AH-Environment
X-Hacker
X-Server
X-Proxy-Cache
X-Turbo-Charged-By
X-Rq
X-Age
X-Ws-Request-Id
Xkey
X-Vhost
Cf-Apo-Via
X-Amz-Version-Id
X-Dispatcher
X-Swift-CacheTime
X-Swift-SaveTime
X-LiteSpeed-Cache
Grace
X-Server-Powered-By
Allow
Ali-Swift-Global-Savetime
X-Varnish-Cache
X-OneAgent-JS-Injection
P3p
X-Page-Speed
X-Pingback
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Cache-Lookup
X-Device
X-WebKit-CSP
EagleEye-TraceId
X-Host
Cf-Railgun
X-Backend-Server
X-Server-Id
X-EdgeConnect-MidMile-RTT
X-EdgeConnect-Origin-MEX-Latency
X-Dns-Prefetch-Control
X-Response-Time
X-Readtime
X-Ruxit-JS-Agent
Surrogate-Control
X-Akam-SW-Version
X-HW
X-Cloud-Trace-Context
Request-Id
X-Node
Content-Location
X-Country
X-Nginx-Cache-Status
X-Application-Context
X-Nginx-Upstream-Cache-Status
Accept-Ch-Lifetime
X-NWS-LOG-UUID
X-Country-Code
Service-Worker-Allowed
X-ASPNET-VERSION
X-Content-Type
X-Trace
X-Clacks-Overhead
Cache-Tag
X-Url
X-Litespeed-Cache
Rating
X-Amz-Server-Side-Encryption
X-Rack-Cache
X-Times
X-PC
X-Vname
X-TtlSet
Cross-Origin-Opener-Policy
X-Edge
X-Mcache
X-Midtier
X-Daa-Tunnel
X-FTR-Request-ID
X-Browser-Type
Nginx-Cache
X-Server-Name
X-Powered-By-Plesk
AR-Request-ID
AR-ATIME
AR-PoweredBy
AR-SID
X-CST
X-Cnection
X-Cache-TTL
Accept-Ch
X-ESI
X-GitHub-Request-Id
X-Ac
X-Element-Page-Cache
Edge-Control
X-D2id
X-Cdn-Fetch
X-Kinja-Build
X-Kinja-Revision
X-Kinja-Server
Verso
X-Kinja
X-Exp-Id
X-Exp-Variant
X-GoogleNews-Bot
X-MS-InvokeApp
X-Ser
AR-CACHE
X-Vcap-Request-Id
X-Abt-Application-Version
X-Upstream
X-ECACHE
X-FastCGI-Cache
X-B3-TraceId
X-Dw-Request-Base-Id
X-Navigation-Version
Fastly-Restarts
SPRequestDuration
SPIisLatency
X-Webkit-Csp
X-Mod-Pagespeed
X-Amz-Rid
X-Server-Lifecycle-Phase
SPRequestGuid
X-SharePointHealthScore
X-Erf-Bev-Bev
X-Kraken-Loop-Name
X-Instrumentation
X-Erf-Bev-Bev-Is-Generated
X-PDP-UNCACHING-HASH
X-Kinsta-Cache
X-Edge-Location-Klb
X-Goog-Hash
X-Client-IP
X-ARC
X-Ratelimit-Limit
X-Middleton-Display
Pagespeed
X-Powered-CMS
X-Mg-S
X-Sol
Display
X-NF-Request-ID
S
X-Oneagent-Js-Injection
Edge-Cache-Tag
X-Amzn-Trace-Id
Cache-Status
X-Version
Access-Control-Request-Method
X-Middleton-Response
Response
X-VARITI-CCR
RTSS
X-Ratelimit-Remaining
X-TTL
X-Varnish-TTL
X-Fastly-Request-ID
X-Forwarded-For
X-Cache-Key
X-T
X-Content-Digest
Realpath
Cross-Origin-Resource-Policy
X-Recruiting
X-TraceId
X-Correlation-Id
Fastcgi-Cache
X-ORACLE-DMS-RID
X-Cached
X-MSEdge-Ref
X-Shield-Request-Id
Front-End-Https
MicrosoftSharePointTeamServices
X-RateLimit-Remaining
X-Ua-Browser
X-Forwarded-Proto
X-Request-Received
X-Request-Processing-Time
MS-Author-Via
Payment
X-LLID
X-Frontend
X-Protected-By
TP-Cache
Arr-Disable-Session-Affinity
X-PressLabs-Stats
Server-Node
X-HS-Content-Id
X-HS-Hub-Id
X-HS-Cache-Config
Public-Key-Pins
Content-MD5
X-SRCache-Store-Status
X-SRCache-Fetch-Status
X-Ruxit-Js-Agent
Count-Hit
X-TEC-API-ORIGIN
X-TEC-API-VERSION
X-TEC-API-ROOT
X-Accel-Expires
X-GUploader-UploadID
X-HS-Combine-CSS
X-Distributor
X-LB-Cache
X-FTR-Backend
X-Country-Code-Real
X-FTR-Backend-Server
X-FTR-Cache-Status
X-FTR-Balancer
X-Origin-Server
X-Kong-Upstream-Latency
X-Kong-Proxy-Latency
X-Server-ID
X-NODE
X-Ezoic-Cdn
X-FTR-Expires
X-Jurisdiction
X-HP-Webp
X-HP-Trace-Id
X-Request-Handler-Origin-Region
X-Microsite
X-Www-Served-By
X-Newrelic-App-Data
X-App-Server
X-Content-Security-Policy-Report-Only
X-AppVersion
Host
Accept-Charset
X-Az
X-Varnish-Server
X-Activity-Id
X-B3-TraceId-Primal
X-Cluster-Name
Cache-Tags
Mrf-Cache-Status
MRF-Tech
X-ORACLE-DMS-ECID
Retry-After
X-Amz-Meta-S3cmd-Attrs
Cleartype
X-Varnish-Backend
X-Goog-Metageneration
X-Ua-Device
Filterid
Server-Name
X-Unique-Id
X-Ttl
Surrogate-Key
X-Git-Hash
Access-Control-Allow-Method
X-Debug
X-Hits
X-Envoy-Decorator-Operation
X-Upgrade-Enabled
X-Load-Cache
X-NGENIX-Cache
X-Azure-Ref
X-Logged-In
X-CSRF-Token
X-Geo-Country
X-Hostname
X-FB-Debug
TCN
X-Id
TP-L2-Cache
X-Proxy
X-Tt-Trace-Tag
X-Tt-Trace-Host
X-Amz-Apigw-Id
X-Seen-By
X-Amzn-RequestId
Section-Io-Cache
X-TT
X-B
X-Grace
X-Cache-Control
X-Pinterest-Rid
Pinterest-Version
X-Request-Guid
DC
Pinterest-Generated-By
X-Revision
X-B3-Sampled
X-Fb-Rlafr
X-CCDN-CacheTTL
X-CCDN-Origin-Time
Viewport
X-Hcs-Proxy-Type
X-Contextid
X-Type
X-F-Cache
X-Trace-Id
Healthy
X-Time
Referer-Policy
X-Mobile
X-Goog-Generation
X-N
X-Goog-Storage-Class
X-Goog-Stored-Content-Encoding
X-Goog-Stored-Content-Length
Fastly-SIE
Fastly-SWR
X-XRDS-LOCATION
Paypal-Debug-Id
X-DIS-Request-ID
Content-Disposition
X-WP-CF-Super-Cache-Cache-Control
X-WP-CF-Super-Cache
X-Page-Id
X-Debug-Info
X-Varnish-Grace
X-Px
X-Magnolia-Registration
X-Via-JSL
X-Origin-Cache
Version
X-Webkit-CSP
X-Amz-Replication-Status
X-Ratelimit-Reset
X-Whom
X-Aws-Lambda-Call-Status
X-Datadog-Sampling-Priority
X-Datadog-Trace-Id
X-Datadog-Parent-Id
X-Content-Options
X-ProcessESI
X-UUID
X-G
X-RemovedCookies
X-Oracle-Dms-Ecid
X-Adobe-Content
X-App-Environment
X-Debug-IsPreview
X-Debug-IsConnected
X-Adobe-Loc
X-Template
X-Tumblr-Pixel-0
X-Tumblr-User
X-Tumblr-Pixel-1
X-Tumblr-Pixel
X-Rule
X-Node-Name
VIX-Pulpo-Upstream-Status
VIX-Pulpo-Node
X-Storage
X-Hl-Ver
X-RTag
X-Datadog-Sampled
SD-X-WS
NGB
X-Source
X-Yottaa-Metrics
MS-CV
X-Wix-Request-Id
X-Wormhole-Sdk
Charset
Ms-Operation-Id
X-Yottaa-Optimizations
X-Varnish-Ttl
X-User-Agent
X-B-Cache
X-Signature
X-Instance
X-Is-Bot
X-NYM-Debug-Backend
X-Device-Type
X-Region
X-Backend-Name
X-Rendered-As
X-Cacheable-TTL
X-FW-Static
X-FW-Type
X-FW-Version
GEO-INFO
Cross-Origin-Window-Policy
X-FW-Serve
X-Environment-Context
X-ServerID
X-FW-Dynamic
X-FW-Hash
X-Proxy-Cache-Info
X-Status
X-FW-Server
X-L-Path
X-Rid
Amp-Access-Control-Allow-Source-Origin
Country
Countrycode
ServerID
X-IPS-LoggedIn
X-Cache-Grace
X-Real-IP
X-EdgeConnect-Cache-Status
X-NWS-UUID-VERIFY
X-URL
Akamai-GRN
X-Cache-Age
X-RM-Cache-TTL
Front
X-Cache-Hit
SRV
Liferay-Portal
X-Amzn-Remapped-Content-Length
X-WP-CF-Super-Cache-Active
X-Framework
X-B3-SpanId
X-Language
X-Ismobilevalue
X-AB
X-Air-Pt
X-WebKit-CSP-Report-Only
X-Sucuri-Cache
OT-Force-Account-Verify
X-Sucuri-ID
X-Akamai-Request-ID2
X-Nf-Request-Id
X-Content-Powered-By
X-Oracle-Dms-Rid
X-Servername
X-UA
X-Air-Hostname
X-Air-Trace-Id
X-VC-Cache
From-Origin
X-Air-Source
Backend
Xet-Cookie
X-Mode
X-SRV
X-DataDome
X-VC
Accept-Language
Refresh
X-Api-Version
Upgrade-Insecure-Requests
X-Xrds-Location
X-Cache-Time
X-Handled-By
Access-Control-Request-Headers
X-Cache-Status-Check
LB
X-Tt-Logid
X-UPSTREAM-Address
X-RCS-CacheZone
Cache
X-RID
X-Rewrite-Enabled
X-Rn-Rsrv
X-HTML-Minification-Powered-By
Filters
X-JoinUs
X-SaId
Meta-Geo
ServedBy
TWC-Connection-Speed
TWC-GeoIP-LatLong
X-Git-Commit
Property-Id
X-Cms-Context
X-Hosted-By
X-Tumblr-Pixel-2
TWC-GeoIP-Country
X-Container-Uri
TWC-Locale-Group
X-Cache-Rule
X-Cache-Operation
TWC-Device-Class
TWC-Privacy
X-Provided-By
X-PHP-Host
Webcakes-App-Version
Webcakes-App-Name
X-Adobe-Source
X-Labrador-Cache-Channel
X-Origin-Hint
Webcakes-Region
X-Generated-By
X-R9-Blue-Green-Version
X-Webstats-RespID
X-ECache
X-Xfnlog-Site
X-S
X-Nginx-Cache
X-Varnish-Age
X-ProxyCache-Key
X-Served-From
X-Scope-Id
Url
X-Origin-Date
X-Akamai-Edgescape
X-Fastly-Request-Id
X-Skip-Cache
Web-Mar-Node
X-Accel-Version
Section-Io-Id
X-Is-Tablet
X-Lambda-Id
X-Is-Supported-Browser
X-Is-Mobile
X-Is-Desktop
X-Geo-Region
X-Locale
Webserver
X-ProxyCache-Status
Atl-Traceid
X-Loop
X-Logging-Id
X-Site-Version
X-Web-Node
X-Fetched-On
X-Tb
X-Tncms
X-Forwarded-Host
X-Redis-Cache
X-Cache-Debug
X-BYPASS-REASON
X-Browser-Name
X-Endurance-Cache-Level
X-Tcp-Rtt
X-No-Session
X-Ms-Version
Apigw-Requestid
X-Ms-Request-Id
X-Timing-Wait
X-Upstream-Ct
Mn-Server-Ip
X-Upstream-Ht
X-IPLB-Request-ID
X-IPLB-Instance
X-Format
X-Varnish-Beresp-Grace
X-Request-URI
X-Shopify-Stage
X-Reqid
X-Varnish-Cache-Hits
Selected-Fe
X-Cache-Host
X-Frame-Option
X-Cluster
X-Httpd
X-Proxy-Build
X-Alternate-Cache-Key
X-Edge-Location
X-INCAP-ABP
X-Director
X-Detected-As
X-Say-TTL
X-Optimistic-Header
X-Soup
X-Say-Cacheable
X-Restarts
X-Origin
X-SayCDN-TTL
X-Storefront-Renderer-Rendered
X-AWS-Id
X-Cloudmap
X-Extlb
X-LJ-Flow-ID
X-RateLimit-Limit
X-Mg-Request-UUID
X-Proxied
X-Zipkin-Id
X-VWS-Id
X-Routing-Service
X-VCT
Xserver
Frame-Options
X-ShardId
X-ShopId
X-Sorting-Hat-PodId
X-Sorting-Hat-ShopId
X-Azure-Ref-OriginShield
X-GeoCode
X-GeoCountry
X-Vcl-Version
Onion-Location
Expiry
X-Connection-Hash
X-Lagoon
WPO-Cache-Message
X-Vcache
WPO-Cache-Status
Source
X-CDN-Forward
X-CMSURLCustom
Protected
X-Thinkindot-L3
X-Generation-Time
X-Shield-Cache-Expires
Thinkindot-CacheControl-Type
Thinkindot-Control
Thinkindot-CacheControl
X-WP-CF-Super-Cache-Cookies-Bypass
X-Cache-Expired-At
TDXMobile
Cdn-Requestid
X-Drupal-Cache-Tags
X-ID
X-Drupal-Cache-Contexts
X-Origin-CC
X-Cdn-Origin
Fastcgi-Useragent
X-Origin-TTL
Environment
X-Cache-Action
X-Proxy-Cache-Status
X-XRDS-Location
Priority
X-Pass-Why
X-PHP-Backend
X-Vercel-Cache
X-Vercel-Id
X-Worker
X-GEO
Cache-Hits
X-Rocket-Nginx-Serving-Static
Uber-Trace-Id
Azure-Version
Azure-InstanceId
Azure-RegionName
Azure-SlotName
Azure-SiteName
Node
X-App-Version
X-TA-CDN-Provider
X-Client-Ip
Sid
X-Urbn-Context-Path
Locale
X-Urbn-Site-Id
X-Buckets
X-Cluster-Node
CF-IPCountry
CDN-Uid
CDN-RequestCountryCode
CDN-RequestPullSuccess
Cross-Origin-Embedder-Policy
X-Aspnetmvc-Version
CDN-CachedAt
CDN-EdgeStorageId
CDN-PullZone
CDN-RequestPullCode
CDN-Cache
X-Tumblr-Pixel-3
X-FB-TRIP-ID
Cache-Tv-Group
X-Auth-Group-Type
X-RateLimit-Reset
X-Fastcgi-Cache
X-Cache-Server
AMP-Access-Control-Allow-Source-Origin
X-B3-Traceid
X-HITS
Alternate-Protocol
DB-Nickname
X-Server-W
X-Tx-Id
X-Pad
X-A
Content-Secure-Policy
Cdn-Request-Time
DCR-Decision-By
Gannett-Cam-Experience-Id
X-Fastly-Backend
Cdn-Host
DCR-Processing-Time-Ms
X-ND-Cache
X-Ig-Origin-Region
X-Level-Front-Cache
X-Esi-Check
X-Service
X-Gzip
A
X-Generated-On
X-Op-Id-All
X-GeoIP-City
Candidate-Md5Url
Odigeo-Trace-Id
X-Cache-Id
Wxu-Next-Commit
Wxu-Next-Hostname
X-Cache-NE
X-Cache-TTL-Remaining
Sslversion
Surrogated-Key
T-Server
Wxu-Next-Region
X-A-Ccd
X-Aed
X-BCube-Filmed-By
X-Bc-Bl
X-Bl-Debug
X-A-Wwc
X-A-Dam
X-A-Dcw
X-A-Dgt
X-Conf
Rendered-Blocks
X-Dispatcher-Server
MD5-Digest
Meta-Geo-Continent
Magicmarker
Lang
X-Edge-Server
X-Ec-GeoHdr
X-Ec-Fail
X-Developer
Ngx.Var.Host
X-Custom-Header
X-Core-Value
X-Content-Age
X-D
Origin-Agent-Cluster
X-DefHash
X-Org
X-DefElseHash
X-Epic-Correlation-Id
X-Ig-Push-State
X-V-Cache
X-Req
X-Vtex-Remote-Cache
X-TIM-N
X-Varnish-CookieHashed-On
X-Via-Fastly
X-Varnish-CookieINHashed-On
X-Viewer-Country
X-Origin-Cache-Key
X-ScT
X-Vdms-Version
X-Rojux
User-Cache-Control
X-Varnish-Remaining-TTL
X-Origin-Expires
X-SRCache-Key
Mime-Version
X-DC
PFcat
X-VarnishDD-TTL
X-Dc
X-Varnish-Director
Powered-By
Platform
Producers
X-Varnish-Hostname
X-Debug-Cache-Store
X-Tb-Optimization-Total-Bytes-Saved
X-Test
Is-Eu
Host-ID
X-SVT-ORM-RULES
X-SVT-ORM-VERSION
X-DPWN-IS-SECURE
X-Thanos
Req-ID
X-Debug-Cache-Fetch
NM-Fastcgi-Cache
X-UA-Device-Type
X-LiteSpeed-Cache-Control
Origin
X-Cdn-Srv
HostName
XM
X-Wikidot-Static-Cache
X-Wikidot-Backend
X-VTEX-Cache-Server
X-VTEX-Cache-Time
X-Bip
X-Acquia-Purge-Cdn-Unconfigured
X-App-Name
X-Backend-Instance
X-Amz-Storage-Class
X-AK-Request-ID
X-Ad-Load-Variation
X-Aicache-OS
X-Block-Status
X-Cache-Bucket
Ssr
X-VG-TLSProxy
X-Sn-Servicetimems
X-Clientip
RNT-Time
Server-Host
X-VG-WebCache
Tube-Get-Contents
V-Age
Vix-Hermes-Req-Id
X-Cache-Info
Tube-Return
Tube-Got-Eval
Tube-Got-Results
RNT-Machine
X-NGINX-Cache
X-RateLimit-Remaining-Second
X-Region-Sid
X-HS-Content-Campaign-Id
X-B3-Trace-ID
X-Jobs
X-Loc
X-RateLimit-Limit-Second
X-Hnp-Log
X-HN
X-GeoIP-Region-Code
X-GeoIP-Country-Code
X-GoCache-CacheStatus
AKAMAI
Fastly-SSL
Adler-Geo
X-LSADC-Cache
X-Men
X-NMSegId
X-Origin-Time
X-PAYTM-SRV-ID
X-Node-Id
X-NodeID
X-Origin-Response-Time
X-Nyt-Route
X-Platform
X-Policy
X-Mly-Id
X-Micro-Cache
X-Pubstack
X-Mvc-Supplant-Cachable
X-Powered-By-VTEX-Cache
X-Proto
X-GeoIP
X-Request-Time
Click-Count-Action-Start
Click-Count-Error
X-Gdpr
X-Fastly-Cache
Cdncip
X-Server-IP
X-Forwarded-Site
Content-Style-Type
Country-Code
X-FC-Vary-Parameters
Content-Script-Type
X-Fmm-Version
Edge-Cache
Cdnsip
X-Scheme
X-SB
Cache-Provider
X-Geo-Header
X-SD-PageType
X-Gen-Mode
Fastly-Backend-Name
Esi-Enabled
Yak-Timeinfo
X-Pool
X-WA-Info
X-Eu-Site
X-We-Are-Hiring
X-Slack-Shared-Secret-Outcome
X-BBC-Edge-Cache-Status
X-Slack-Backend
X-Cache-FS-Status
X-Ec-Custom-Error
X-Mvc-Supplant-OutputCached
X-Nginx-Cache-Key
X-Depends
X-Request-Start
X-Hash
X-CGP
X-Varnishpool
X-Date
X-Csrf-Jwt
X-Contensis-Viewer-Groups
X-Request-Host
X-Human
X-CUA
X-Cache-Aspx
X-Section
X-Location
X-Var-Ttl
X-Varnish-Beresp-Status
X-Varnish-Authentication
X-Proxied-Request
X-CacheTTL
Release
Fastly-GeoIP-CountryCode
Proxy-Firewall
Req-Svc-Chain
Server-Ext
Sever-Int
DSUID
Server-Hostname
Pramga
Gh-Request-Id
L
L5d-Success-Class
Machine
HA-Ipaddr
On-Server
Origin-EX
Ha-Gx-Prefs
Origin-CC
Cluster
CDCHOST
X-Access
X-Accel-Expires-Debug
Web-Mar-Region
Fusion-Component-Id
Fusion-Template-Id
Fusion-Source
Fusion-Content-Id
Fusion-Deployment-Id
Apple-News-Services-Handled
Cache-Key
Fusion-Content-Source
True-Client-Country-4JS
C-Via
Apple-News-Services-Request-Url
Apple-News-Services-Host
Apple-News-Services-Parsed-Url
X-Auto-Login
X-Varnish-Beresp-Ttl
Mail-Subject
Canary
X-Device-Os
We-Hiring
NGX
W
X-AIR-PT
Server-Info
X-Varnish-Hits
X-Cs
X-Zone
Redirect-Candidate
BehaviorPad-Version
X-LB-ID
Debug
X-Up
X-From
X-NCache
CDN-RequestId
X-Akamai-Transformed
X-MP-GENERATED-AT
X-Jungle-Id
X-APP
X-Refresh
X-Tec-Api-Root
X-Tec-Api-Origin
X-Tec-Api-Version
X-CACHE-AGE
SID
X-Vdms-Path
Pics-Label
CloudFront-Viewer-Country
Fastly-Drupal-HTML
X-Via-Popn
X-HA-Backend
X-Cache-Backend
X-Via-Popv
X-Via-Poph
WP-Super-Cache
X-Parent-Response-Time
X-VHOST
X-B3-Parentspanid
GeoIP-Latitude
X-Servedbyhost
X-Content-Length
X-Uri
X-Datadome
X-CDN-Cache-Status
Fastly-Drupal-Html
X-Litespeed-Tag
X-SERVER-NAME
X-PERF
X-Render-Time
X-Nananana
X-Newrelic-Synthetics
X-VC-TTL
X-LB-NoCache
X-Nc
X-M-Log
X-M-Reqid
X-ApacheServer
X-LiteSpeed-Tag
X-Cached-By
X-NewRelic-App-Data
Datacenter
X-CACHE-KEY
X-CS
X-DynaTrace-JS-Agent
Vc-Max-Age
X-RequestId
X-Dispatcher-Number
X-Wa
NtCoent-Length
Server-ID
GeoIp-Country-Code
Resin-Trace
X-ZONE
Cdn
X-Amz-Meta-Cb-Modifiedtime
Locid
X-B3-Spanid
X-Varnish-Beresp-TTL
X-Original-Request-Id
X-Response-Served-From
X-VCache
Product
X-IAuth-Set-Uid
True-Client-IP
X-Fpc
FSS-Cache
X-Ckpd-Fst-Backend
X-TT-LOGID
Srv
X-TIME
X-Old-Content-Length
Serverhost
X-Esi
X-Bug-Bounty
Uri
X-TX-ID
S-Rt
Cf-Ipcountry
X-HostName
True-Client-Ip
Ngx-Var-Key
X-Nf-Ats-Version
ServerName
CDN
X-Nf-Country
X-Nf-Language
X-HubSpot-Correlation-Id
X-Vgn-Hpd-Reason
X-Vc
Tcn
X-Dynatrace-Js-Agent
X-FPC
X-Srv
X-Cdn-Forward
X-Oracle-DMS-ECID
X-Moov-Xdn-Version
X-Platform-Cluster
X-Moov-T
X-Platform-Processor
X-TH-Server
X-Platform-Router
GeoIP-Country-Code
X-WA
Request-ID
X-Akamai-Device-Characteristics
X-Vmg-Version
CacheControlHeader
X-Dispatch
Server-Id
X-Cdn-Cache-Status
User-Agent
X-APP-VERSION
Hostname
X-Info
Cf-Device-Type
ServerHost
X-Gamma-Serve
X-NC
X-COUNTRY
X-FL-QIT-DEBUG
Srvid
Geoip-Latitude
X-Application
Xc-Version
X-Lb-Nocache
Cross-Origin-Embedder-Policy-Report-Only
X-External-Request-Id
X-Webkit-Csp-Report-Only
X-S-Cookie
X-B-Cookie
X-Destination
X-User
X-Presslabs-Stats
X-Hit
X-Zen-Fury
Expect-Staple
X-Geo
X-ServedByHost
X-Instance-Name
Ohc-File-Size
X-Sigma-Backend
X-Sigma
X-Cache-Date
X-Via-PopN
Cloudfront-Viewer-Country
Cneonction
X-Ha-Backend
X-Amz-Meta-Opti
PICS-Label
X-Via-PopV
Origin-Trial
X-Via-PopH
X-Rocket-Build-Number
X-VCL-Version
X-API-Version
X-Segment-20210421
X-VServer
Epwk-X-Cache
X-V
X-Rollout
X-Ua
X-Eligible
WZWS-RAY
X-App
X-Branch-Name
X-Limited
X-Akamai-Pragma-Client-IP
X-Platform-Server
X-Correlation-ID
Permission-Policy
N-Cache
X-New
X-Srcache-Store-Status
X-Srcache-Fetch-Status
Rtss
X-MiniProfiler-Ids
X-Lb-Id
X-Check-Cacheable
X-Sqd-Stime
XkeyRZ
X-Sqd-Ctime
X-Erf-Stays-Pdp-Viaduct-Migration-Web-V2
X-Proxy-CacheRZ
X-Serial
X-Wp-Cf-Super-Cache
Lb
X-Wp-Cf-Super-Cache-Cache-Control
Cmstype
X-Acquia-Purge-Tags
Cmsid
X-Acquia-Site
X-Web-Server
X-Acquia-Application-UUID
X-Fastly-Backend-Reqs
Timeexpire
X-Internal-TTL
WebServer
X-MSEdge-Features
X-MSEdge-Flight
Ohc-Cache-HIT
X-Datacenter
Ngx
Sm-Log-Id
X-Service-Response-Time
X-Acquia-Application-Trace
X-Ftr-Request-Id
X-DataCenter
X-ElasticPress-Query
DataCenter
X-Litespeed-Cache-Control
X-LAGOON
Servername
X-CSRF-TOKEN
CountryCode
Load-Balancing
X-Via-CDN
Edge-Copy-Time
X-Traceid
X-Via-SSL
Wpo-Cache-Status
X-VTEX-Cache-Backend-Connect-Time
X-VTEX-Cache-Backend-Header-Time
Fl-Custom-Application
X-Via-Edge
X-Requestid
X-Snapshot-Date
Warning
X-Amz-Meta-S3b-Last-Modified
X-Ramcache
X-Th-Server
X-DynaTrace
Type
X-RAMCache
X-Amz-Meta-Sha256
X-Udemy-Cache-App-Namespace
X-Shopid
X-Sorting-Hat-Podid
X-Sorting-Hat-Shopid
X-Shardid
X-Origin-Upstream-Status
X-Dw-Trace-Id
X-IN-APIGATEWAY
X-IN-APIGATEWAYSSL
Wpo-Cache-Message