Threat Level: green Handler on Duty: Didier Stevens

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