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
Expect-CT
Accept-Ranges
X-Powered-By
Pragma
X-XSS-Protection
X-Cache
CF-RAY
Via
Age
Content-Security-Policy
Report-To
NEL
Referrer-Policy
Access-Control-Allow-Origin
Content-Language
X-Amz-Cf-Pop
X-Amz-Cf-Id
Alt-Svc
P3P
X-Cache-Hits
X-UA-Compatible
X-Xss-Protection
CF-Ray
X-Served-By
X-Download-Options
X-Request-Id
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Varnish
X-Adblock-Key
Access-Control-Allow-Credentials
X-Permitted-Cross-Domain-Policies
Content-Security-Policy-Report-Only
X-AspNet-Version
X-Runtime
X-Drupal-Cache
X-Cache-Status
X-Generator
X-Check
X-Cacheable
X-DNS-Prefetch-Control
X-FRAME-OPTIONS
X-Envoy-Upstream-Service-Time
Timing-Allow-Origin
X-Iinfo
X-Drupal-Dynamic-Cache
Feature-Policy
X-Content-Security-Policy
X-Dns-Prefetch-Control
Server-Timing
X-XSS-PROTECTION
Content-Encoding
Access-Control-Expose-Headers
Upgrade
X-CDN
Status
X-AspNetMvc-Version
Access-Control-Max-Age
X-Amz-Request-Id
X-Request-ID
Request-Context
X-Amz-Id-2
X-Via
X-Turbo-Charged-By
X-Backend
X-Cache-Group
X-AH-Environment
X-Robots-Tag
Cf-Edge-Cache
Keep-Alive
Host-Header
X-Hacker
X-Proxy-Cache
X-UA-Device
X-Vhost
X-Server
X-Rq
X-Server-Powered-By
Allow
X-Age
X-Ws-Request-Id
X-Varnish-Cache
X-Dispatcher
EagleId
X-Amz-Version-Id
P3p
Nel
Grace
X-LiteSpeed-Cache
Cf-Apo-Via
X-Styx-Req-Id
X-Pantheon-Styx-Hostname
Cf-Railgun
X-Page-Speed
X-Device
EagleEye-TraceId
X-OneAgent-JS-Injection
X-Aws-Lambda-Call-Status
X-Swift-CacheTime
X-Swift-SaveTime
X-Pingback
Ali-Swift-Global-Savetime
X-Host
X-Node
Accept-CH
X-WebKit-CSP
X-CST
X-Backend-Server
X-Cache-Lookup
Surrogate-Control
X-Server-Id
X-Readtime
X-Nginx-Cache-Status
Permissions-Policy
Accept-CH-Lifetime
X-Nginx-Upstream-Cache-Status
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-Akam-SW-Version
Request-Id
X-Application-Context
X-Content-Security-Policy-Report-Only
X-Cloud-Trace-Context
X-Ua-Compatible
X-Response-Time
X-HW
X-Trace
X-Edge
Xkey
X-Ruxit-JS-Agent
Content-Location
X-Clacks-Overhead
X-Mod-Pagespeed
Rating
X-Midtier
X-ESI
X-Url
X-Amz-Server-Side-Encryption
X-ECACHE
X-Mcache
X-Litespeed-Cache
Accept-Ch
Cache-Tag
X-Upstream
X-Country
X-Vcap-Request-Id
X-MS-InvokeApp
X-D2id
X-Rack-Cache
Verso
X-Use-Magma
X-Exp-Id
X-GoogleNews-Bot
X-Kinja-Revision
X-Powered-By-Plesk
X-Cdn-Fetch
X-Element-Page-Cache
X-Kinja-Server
X-Exp-Variant
X-Kinja-Build
X-Kinja
Edge-Control
Accept-Ch-Lifetime
X-PC
X-Vname
X-TtlSet
RTSS
X-Ac
Service-Worker-Allowed
X-Country-Code
Fastly-Restarts
Origin-Trial
X-VARITI-CCR
X-WebKit-CSP-Report-Only
X-Navigation-Version
X-Abt-Application-Version
X-Goog-Hash
X-Cache-TTL
X-Ruxit-Js-Agent
X-Varnish-TTL
X-Cached
X-GitHub-Request-Id
X-Aspnetmvc-Version
X-Browser-Type
X-Amz-Rid
X-Oneagent-Js-Injection
X-Webkit-CSP
Pagespeed
Display
X-Middleton-Display
X-Sol
Cross-Origin-Opener-Policy
X-Kinja-CCPA
X-Dw-Request-Base-Id
X-Server-Name
X-SharePointHealthScore
SPRequestGuid
X-Amzn-Trace-Id
X-Ttl
X-NWS-LOG-UUID
X-ORACLE-DMS-ECID
X-ORACLE-DMS-RID
X-Powered-CMS
X-Mg-S
X-Content-Type
SPIisLatency
SPRequestDuration
X-Erf-Bev-Bev
X-Instrumentation
X-Erf-Bev-Bev-Is-Generated
X-Kraken-Loop-Name
X-Server-Lifecycle-Phase
AR-Request-ID
AR-ATIME
AR-PoweredBy
AR-SID
X-Middleton-Response
X-Cache-Key
Response
Arr-Disable-Session-Affinity
X-Times
Pinterest-Version
X-Pinterest-Rid
Pinterest-Generated-By
X-B3-TraceId
X-FastCGI-Cache
X-Version
X-Server-ID
X-HP-Trace-Id
X-Jurisdiction
X-HP-Webp
X-Cnection
X-SRCache-Store-Status
X-SRCache-Fetch-Status
X-Fastly-Request-ID
AR-CACHE
X-T
X-NF-Request-ID
Cache-Tags
X-Accel-Expires
X-B3-Traceid
Nginx-Cache
X-Ser
X-Client-IP
Cache-Status
Edge-Cache-Tag
Front-End-Https
X-MSEdge-Ref
X-Hits
X-Px
Public-Key-Pins
X-RateLimit-Remaining
X-Recruiting
Payment
X-B3-TraceId-Primal
MRF-Tech
Mrf-Cache-Status
X-Request-Received
X-LLID
X-Frontend
X-Request-Processing-Time
Server-Node
X-Ua-Browser
S
X-Shield-Request-Id
X-RateLimit-Limit
X-DIS-Request-ID
X-GUploader-UploadID
X-Goog-Metageneration
Content-MD5
MicrosoftSharePointTeamServices
X-Amzn-RequestId
X-Amz-Apigw-Id
TP-Cache
Access-Control-Request-Method
X-Content-Digest
X-TTL
X-HS-Hub-Id
X-HS-Cache-Config
X-PressLabs-Stats
X-Protected-By
X-HS-Content-Id
X-HS-Combine-CSS
X-Erf-Stays-Pdp-Viaduct-Migration-Web
X-Distributor
X-Microsite
Realpath
X-Request-Handler-Origin-Region
Fastcgi-Cache
X-Daa-Tunnel
Access-Control-Allow-Method
X-FB-Debug
X-LB-Cache
X-Cluster-Name
X-Page-Id
X-Ratelimit-Remaining
X-Forwarded-For
Accept-Charset
X-Rid
X-Fastcgi-Cache
X-Geo-Country
TP-L2-Cache
X-Ezoic-Cdn
X-Hostname
X-Aspnet-Version
X-Ua-Device
X-B3-Sampled
X-Seen-By
X-Goog-Generation
X-Goog-Storage-Class
X-Goog-Stored-Content-Encoding
X-Goog-Stored-Content-Length
Cross-Origin-Resource-Policy
Cleartype
X-Correlation-Id
X-Ratelimit-Limit
X-Newrelic-App-Data
Count-Hit
TCN
Referer-Policy
X-Mobile
DC
X-App-Server
X-Content-Options
X-Varnish-Backend
X-Logged-In
X-Origin-Cache
X-Hosted-By
X-Edge-Location-Klb
X-Kinsta-Cache
X-Debug-Info
X-Git-Hash
X-Contextid
X-Envoy-Decorator-Operation
X-Grace
X-IPS-LoggedIn
X-Flags
X-Fb-Rlafr
X-Amz-Replication-Status
X-Aspnet-Duration-Ms
X-Is-Crawler
X-Providence-Cookie
X-Request-Guid
X-Route-Name
X-Varnish-Grace
X-Revision
Surrogate-Key
Frame-Options
X-TT
X-App-Environment
X-Amz-Meta-S3cmd-Attrs
X-Azure-Ref
X-Id
Retry-After
X-TEC-API-ORIGIN
X-TEC-API-ROOT
X-Forwarded-Proto
X-TEC-API-VERSION
X-Webkit-CSP-Report-Only
X-F-Cache
X-Origin-Server
X-Xrds-Location
X-Wix-Request-Id
X-Magnolia-Registration
X-Whom
Section-Io-Cache
X-Client-Ip
Healthy
Alternate-Protocol
Charset
X-RateLimit-Reset
X-Akamai-Edgescape
X-COUNTRY
X-Backend-Name
MS-Author-Via
WPO-Cache-Status
Viewport
WPO-Cache-Message
X-Proxy-Cache-Info
X-App-Version
X-Webkit-Csp
Paypal-Debug-Id
X-B
X-Az
X-Www-Served-By
SRV
X-AppVersion
X-Activity-Id
X-Language
Amp-Access-Control-Allow-Source-Origin
X-Instance
X-Response-Served-From
ServerID
X-DataDome
VIX-Pulpo-Upstream-Status
Filterid
X-Http-Reason
SD-X-WS
Host
X-ARC
X-Varnish-Server
X-Cache-Rule
VIX-Pulpo-Node
X-Original-Request-Id
Akamai-GRN
X-User-Agent
Country
X-Akamai-Request-ID2
X-UUID
X-Varnish-Age
X-Datadog-Trace-Id
X-Datadog-Sampling-Priority
Front
X-Datadog-Parent-Id
X-N
X-Edge-Location
Protected
X-Cache-Grace
X-Rule
X-Cacheable-TTL
X-FW-Type
From-Origin
X-FW-Version
X-L-Path
X-EdgeConnect-Cache-Status
X-Status
X-Jobs
X-Region
X-Unique-Id
X-Environment-Context
Server-Name
X-FW-Dynamic
X-Page-View
X-FW-Hash
X-FW-Server
X-FW-Static
X-FW-Serve
X-Is-Bot
X-Framework
X-Load-Cache
X-Cache-Time
X-Rendered-As
X-Rocket-Nginx-Serving-Static
X-Tumblr-Pixel-0
X-Adobe-Content
Fastly-SWR
X-Adobe-Loc
X-Tumblr-Pixel
X-Type
X-Tumblr-User
Fastly-SIE
X-Tumblr-Pixel-1
X-Kong-Upstream-Latency
X-Trace-Id
X-Time
X-ProcessESI
X-G
X-Kong-Proxy-Latency
X-RemovedCookies
Access-Control-Request-Headers
X-Proxy
X-Yottaa-Optimizations
X-Vcache
X-Yottaa-Metrics
X-Datadog-Sampled
X-Mg-Request-UUID
X-XRDS-Location
X-Cache-Control
X-Amzn-Remapped-Content-Length
X-Signature
Content-Disposition
X-Debug-IsConnected
X-B-Cache
X-Debug-IsPreview
X-ECache
X-Cache-Age
X-CDN-Forward
X-Tec-Api-Origin
X-Tec-Api-Root
X-Tec-Api-Version
X-Nf-Request-Id
Refresh
X-Erf-Web-Scheduler
Backend
X-Drupal-Cache-Tags
X-DynaTrace
Xet-Cookie
Accept-Language
X-WP-CF-Super-Cache-Cache-Control
X-WP-CF-Super-Cache
X-Source
Countrycode
X-Generated-By
CF-IPCountry
X-Servername
X-HTML-Minification-Powered-By
X-Httpd
X-DynaTrace-JS-Agent
X-Nginx-Cache
Url
Webserver
X-Tt-Trace-Tag
X-Tt-Trace-Host
Version
X-Mode
X-Device-Type
Xserver
X-NYM-Debug-Backend
X-Template
X-Content-Powered-By
X-Storage
GEO-INFO
X-Content-Age
X-UPSTREAM-Address
X-XRDS-LOCATION
X-GeoCountry
X-Urbn-Context-Path
X-LAGOON
X-JoinUs
X-GeoCode
X-Cache-Operation
Onion-Location
Meta-Geo
Locale
Load-Balancing
S-Rt
X-Urbn-Site-Id
X-ServerID
X-Director
X-Cache-Action
OT-Force-Account-Verify
Filters
X-SayCDN-TTL
X-Say-TTL
X-Say-Cacheable
X-SaId
X-Rewrite-Enabled
X-URL
X-Rn-Rsrv
X-Varnish-Cache-Hits
X-Container-Uri
X-Cluster-Node
Azure-InstanceId
X-Proto
X-MCACHE
X-Generation-Time
Azure-Version
X-Soup
X-Git-Commit
X-Varnish-Hostname
Azure-RegionName
Azure-SlotName
Azure-SiteName
X-Forwarded-Host
X-Ms-Version
X-Cache-Server
X-RM-Cache-TTL
X-PHP-Host
X-Lambda-Id
X-Labrador-Cache-Channel
Web-Mar-Node
X-Adobe-Source
X-Served-From
X-Tt-Logid
X-Ms-Request-Id
X-VCT
X-Tb
X-Detected-As
X-Sql-Duration-Ms
X-Sql-Count
X-VC-Cache
Property-Id
X-Format
X-Proxied
X-R9-Blue-Green-Version
X-Tumblr-Pixel-3
X-Logging-Id
X-RCS-CacheZone
X-Zipkin-Id
Mn-Server-Ip
X-Origin-Hint
Node
TWC-GeoIP-Country
Webcakes-App-Name
X-FB-TRIP-ID
X-Tumblr-Pixel-2
X-Skip-Cache
Webcakes-App-Version
Webcakes-Region
X-Extlb
Uber-Trace-Id
TWC-Privacy
X-Debug
TWC-Device-Class
X-Tncms
X-Routing-Service
X-Loop
TWC-Locale-Group
TWC-Connection-Speed
TWC-GeoIP-LatLong
DB-Nickname
X-Proxy-Build
X-CCDN-Origin-Time
Selected-Fe
X-LSADC-Cache
X-Fetched-On
X-Hcs-Proxy-Type
X-Timing-Wait
X-CCDN-CacheTTL
X-Uri
X-Zen-Fury
Fastcgi-Useragent
X-Cache-Hit
X-Endurance-Cache-Level
Cross-Origin-Window-Policy
X-Sucuri-Cache
X-Ua
X-Upgrade-Enabled
X-Sucuri-ID
Source
X-Redis-Cache
X-Drupal-Cache-Contexts
CDN-RequestId
X-Oracle-Dms-Rid
X-Oracle-Dms-Ecid
X-B3-SpanId
X-Srv
X-Ratelimit-Reset
Section-Origin-Responded
Section-Io-Origin-Time-Seconds
Section-Io-Origin-Status
X-Origin-Date
Section-Io-Id
X-TimeS
X-MP-GENERATED-AT
X-Newrelic-Synthetics
Liferay-Portal
X-Pass-Why
X-S
Fastly-Drupal-HTML
X-ID
X-Varnish-Hits
X-Cache-Expired-At
X-Origin-CC
X-Akamai-Transformed
Upgrade-Insecure-Requests
X-NGENIX-Cache
X-Origin-TTL
X-Real-IP
X-CACHE-AGE
X-UA-Device-Type
X-Handled-By
X-Cache-TTL-Remaining
NGB
X-Fastly-Request-Id
X-GEO
X-Node-Name
X-Pubstack
X-Via-JSL
X-Hl-Ver
X-Varnish-Ttl
CDN-CachedAt
X-Reqid
X-Restarts
X-Xfnlog-Site
X-Optimistic-Header
X-Cms-Context
Apigw-Requestid
X-Cache-Type
CDN-Uid
CDN-RequestPullSuccess
CDN-PullZone
CDN-EdgeStorageId
Content-Secure-Policy
CDN-RequestCountryCode
CDN-Cache
CDN-RequestPullCode
X-Server-W
MS-CV
ServedBy
Ms-Operation-Id
X-FTR-Request-ID
X-CSRF-Token
X-RTag
X-ProxyCache-Status
X-Tx-Id
X-Cache-Host
X-Parent-Response-Time
X-ProxyCache-Key
WP-Super-Cache
X-No-Session
X-BYPASS-REASON
MD5-Digest
Meta-Geo-Continent
Ha-Gx-Prefs
HA-Ipaddr
Magicmarker
L
X-Request-Host
L5d-Success-Class
Lang
Redirect-Candidate
Ngx.Var.Host
Odigeo-Trace-Id
X-Nyt-Route
N-Cache
X-Orig-Expires
X-Gdpr
Origin-Agent-Cluster
Gh-Request-Id
X-Origin-Time
Candidate-Md5Url
X-SD-PageType
X-ScT
X-S-Cookie
X-IPLB-Request-ID
X-IPLB-Instance
X-Slack-Shared-Secret-Outcome
X-Slack-Backend
X-Shop-Environment
X-Rojux
X-SRCache-Key
DCR-Processing-Time-Ms
Fastly-SSL
X-Vdms-Path
DCR-Decision-By
X-Forwarded-Path
BehaviorPad-Version
X-Tenant
Canary
Gannett-Cam-Experience-Id
X-External-Request-Id
X-Debug-Cache-Fetch
X-D
X-Application
X-Csrf-Jwt
X-Vdms-Version
X-Aed
X-A-Dgt
X-A-Wwc
X-Destination
X-Debug-Cache-Store
X-B-Cookie
X-Bc-Bl
X-Conf
X-CGP
X-CF-Lambda-Fn
X-Viewer-Country
X-CacheTTL
X-Cache-NE
X-BCube-Filmed-By
X-We-Are-Hiring
X-Bl-Debug
X-Vtex-Remote-Cache
X-Worker
X-Developer
Server-Host
Sslversion
Surrogated-Key
X-Ec-Fail
Rendered-Blocks
X-Ec-GeoHdr
X-Fastly-Backend
X-CF-Lambda-Version
X-Eu-Site
X-Epic-Correlation-Id
T-Server
True-Client-Country-4JS
X-Dispatcher-Number
X-A-Ccd
X-A-Dam
X-A-Dcw
X-Ec-Custom-Error
Xc-Version
Vix-Hermes-Req-Id
W
Web-Mar-Region
X-A
X-FC-Vary-Parameters
X-App
X-Vcl-Version
X-LJ-Flow-ID
X-TIME
X-Cluster
X-VWS-Id
X-AWS-Id
X-Level-Front-Cache
X-Request-Time
Thinkindot-Control
Thinkindot-CacheControl
Thinkindot-CacheControl-Type
X-Loc
X-Refresh
X-Qloud-Router
X-Pool
X-Policy
X-RateLimit-Limit-Second
X-RateLimit-Remaining-Second
VNS-Cache
TDXMobile
We-Hiring
VNS-Age
X-Server-IP
X-Sn-Servicetimems
X-Shopify-Stage
Origin
X-Sorting-Hat-PodId
X-Sorting-Hat-ShopId
Mail-Subject
X-Storefront-Renderer-Rendered
X-Irp-Debug
X-ShopId
X-Accel-Buffering
X-GeoIP-Region-Code
Req-Svc-Chain
Release
X-ShardId
Producers
X-S-Maxage
X-DPWN-IS-SECURE
X-Clientip
X-CMSURLCustom
X-Nitro-Cache
X-Node-Id
X-NodeID
X-Cdn-Diag
X-Cdn-Origin
X-Core-Mission
X-Core-Value
X-DefHash
X-Mly-Id
X-DefElseHash
X-Mvc-Supplant-Cachable
X-Nananana
X-Date
X-Old-Content-Length
X-Correlation-ID
X-Platform
X-PERF
X-Auto-Login
X-ApacheServer
X-Alternate-Cache-Key
X-Mid
X-SVT-ORM-RULES
X-PAYTM-SRV-ID
X-Owner
X-Cache-Debug
X-Cache-Info
X-Cache-Bucket
X-Org
X-BBC-Edge-Cache-Status
X-Bip
X-Accel-Expires-Debug
Platform
X-Var-Ttl
Cf-Device-Type
X-Variation
Cache-Provider
X-Varnish-CookieINHashed-On
X-Varnish-CookieHashed-On
Cmsid
Cmstype
X-Thinkindot-L3
X-Thanos
X-Hash
Datacenter
CPC-Age
CPC-Cache
X-Varnish-Remaining-TTL
AKAMAI
X-Wix-Viewer-Type
X-Wikidot-Static-Cache
X-Generated-On
X-Geo-Header
X-GeoIP-Country-Code
X-App-Name
X-Wikidot-Backend
X-VServer
X-Varnishpool
Adler-Geo
X-VG-TLSProxy
X-VG-WebCache
X-Vmg-Version
Environment
X-Up
Fastly-Backend-Name
Expect-Staple
X-Test
Fastly-GeoIP-CountryCode
X-Human
Host-ID
X-SVT-ORM-VERSION
Is-Eu
X-INCAP-ABP
Cache-Name
User-Cache-Control
X-Proxy-Cache-Status
Apple-News-Services-Request-Url
X-Cache-Status-Check
X-Block-Status
X-Dispatcher-Server
Apple-News-Services-Host
NM-Fastcgi-Cache
X-Origin-Response-Time
Apple-News-Services-Handled
X-Forwarded-Site
X-Origin
X-WA-Info
X-Mvc-Supplant-OutputCached
X-Fmm-Version
X-GeoIP
X-Gzip
Machine
X-Nginx-Cache-Key
X-Clara-WADP
X-Akamai-Device-Characteristics
X-Datadome
X-Gen-Mode
X-Cdn-Srv
X-WADP-Cache
X-Cache-Id
Apple-News-Services-Parsed-Url
Server-Hostname
CDCHOST
X-AIR-PT
DSUID
Server-Ext
CloudFront-Viewer-Country
Country-Code
X-Esi-Check
X-Device-Os
Esi-Enabled
X-From
X-Hnp-Log
Sever-Int
X-Micro-Cache
X-B3-Spanid
X-AB
X-Section
NGX
X-LB-NoCache
C-Via
X-NCache
Ssr
Memcached
X-JWT-State
X-Instance-Name
Wxu-Next-Region
X-Has-Esi
Pics-Label
Server-Info
X-Amz-Meta-Cb-Modifiedtime
X-Is-Gdpr
X-Access
X-Op-Id-All
Wxu-Next-Hostname
Wxu-Next-Commit
X-Cache-Enabled
X-API-Version
X-Presslabs-Stats
AMP-Access-Control-Allow-Source-Origin
X-CACHE-GROUP
X-Via-Fastly
X-Dc
X-Geo-Region
X-Vgn-Hpd-Reason
Server-ID
Hostname
Cache-Hits
X-HA-Backend
X-Scale
Origin-CC
Memory
Origin-EX
Time
X-PHP-Backend
X-TraceId
X-Accel-Version
X-Wp-Cf-Super-Cache-Active
X-ZONE
X-Varnish-Beresp-Ttl
X-Varnish-Beresp-Grace
X-TIM-N
X-Buckets
Cdn-Requestid
IsBot
X-SIPLIST1
X-Platform-Router
X-Platform-Processor
X-Platform-Cluster
Location
X-Is-Desktop
X-Air-Hostname
X-Air-Source
X-Air-Trace-Id
X-Browser-Name
X-Is-Mobile
X-Tcp-Rtt
X-Is-Tablet
X-Is-Supported-Browser
X-Tb-Optimization-Total-Bytes-Saved
X-Internal-Host
Sid
YJS-ID
X-B3-Parentspanid
X-Azure-Ref-OriginShield
Resin-Trace
CF-Ctrl
X-Backend-Instance
X-Fpc
X-Cs
X-Webkit-Csp-Report-Only
X-WP-CF-Super-Cache-Active
X-Zone
X-Cached-By
GeoIP-Latitude
X-DC
X-Origin-Expires
X-DataCenter
X-TA-CDN-Provider
Cache-Host
X-Microcachable
X-Web-Node
Epwk-X-Cache
Uri
XM
X-Hyper-Cache
X-Info
X-LiteSpeed-Cache-Control
X-Frame-Option
X-VarnishDD-TTL
X-Pod-Name
PFcat
X-Nitro-Cache-From
X-NGINX-Cache
X-Nitro-Rev
X-HN
X-Locale
True-Client-Ip
X-Site-Version
X-Service
GeoIP-Country-Code
X-Ad-Defer-Variation
X-Webstats-RespID
User-Agent
GeoIp-Country-Code
X-VC
X-VCache
X-Origin-Cache-Key
X-CS
X-Cache-Ttl
Srvid
X-Via-CDN
X-Via-Edge
X-Via-SSL
X-FL-EDGE
A
Locid
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Cdn
XServer
X-FL-QIT-DEBUG
X-CSRF-TOKEN
LB
X-NewRelic-App-Data
X-FTR-Cache-Status
X-Datacenter
X-FTR-Balancer
X-Country-Code-Real
True-Client-IP
X-FTR-Expires
X-FTR-Backend-Server
X-FTR-Backend
X-Github-Request-Id
X-Geo
SID
X-Moov-T
NtCoent-Length
X-Cache-ASPX
X-TRACE-ID
X-FireWall-Port
X-Contensis-Viewer-Groups
X-Varnish-Authentication
X-SRV
X-ATG-Version
Cdn-Host
X-Edge-Server
X-Moov-Xdn-Version
Cdn-Request-Time
X-Vercel-Id
X-FPC
X-MSEdge-Flight
Req-ID
Cache-Key
X-Pad
X-NMSegId
X-MSEdge-Features
M-TraceId
X-Vercel-Cache
WZWS-RAY
Fastly-Drupal-Html
Tcn
X-HostName
WebServer
Path
X-Ad-Load-Variation
X-LiteSpeed-Tag
Cluster
X-APP-VERSION
X-Cdn-Request-ID
Cf-Ipcountry
CountryCode
X-Api-Version
X-Air-Pt
Content-Style-Type
X-Amz-Meta-Opti
Cdncip
Pramga
X-Request-Start
X-Scope-Id
X-M-Reqid
X-M-Log
Cdnsip
X-AK-Request-ID
X-Esi
Content-Script-Type
X-Shield-Cache-Expires
X-Varnish-Beresp-Status
X-Wp-Cf-Super-Cache-Cache-Control
X-NWS-UUID-VERIFY
X-HS-Content-Campaign-Id
X-Qnm-Cache
X-Branch-Name
X-Upstream-Ct
X-Platform-Server
X-Planisys-CDN-TTL
X-Wp-Cf-Super-Cache
X-Planisys-CDN-Cache
X-Planisys-CDN-Rules
State
X-Upstream-Ht
X-Request-URI
X-Wp-Cf-Super-Cache-Cookies-Bypass
Edge-Cache
X-Proxy-CacheRZ
X-Release
X-Cache-Date
XkeyRZ
X-WP-CF-Super-Cache-Cookies-Bypass
Yak-Timeinfo
X-Fastly-Cache
X-Vgn-Hpd-Cached
X-Vgn-Hpd-Variations-Key
X-Vgn-Hpd-Ssi
X-CACHE-KEY
CDN
X-Rebelmouse-Cache-Control
X-Rebelmouse-Surrogate-Control
HostName
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X-TH-Server
X-Akamai-Pragma-Client-IP
X-Sigma
X-Rocket-Build-Number
X-Tim-N
Srv
Ohc-File-Size
X-Sigma-Backend
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Lb
X-Cache-Remote
Proxy-Connection
X-HS-Status
X-Lb-Cache
Cache-Tv-Group
Tube-Got-Eval
Tube-Got-Results
X-Dw-Trace-Id
X-LB-ID
X-Cache-FS-Status
Tube-Return
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X-Acquia-Purge-Cdn-Unconfigured
X-Nc
Cache
X-B3-Trace-ID
Click-Count-Error
X-Req
X-Wa
Tube-Get-Contents
Click-Count-Action-Start
X-User
X-Ha-Backend
CF-Cached-On
X-Via-Popn
X-Via-Popv
Server-Id
X-Servedbyhost
X-SB
X-V-Cache
X-UA
X-Via-Poph
X-TT-LOGID
X-GoCache-CacheStatus
X-CUA
X-Fastly-Backend-Reqs
X-Men
X-Vary
On-Server
Ohc-Cache-HIT
MIME-Version
V-Age
Wpo-Cache-Status
X-Acquia-Purge-Tags
X-Acquia-Application-UUID
X-Lb-Nocache
X-Acquia-Site
Wpo-Cache-Message
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PICS-Label
X-Gamma-Serve
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X-Acquia-Application-Trace
X-EC-Lua
X-Via-Ucdn
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X-Provided-By
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Yjs-Id
X-VCL-Version
X-Cached-Since
Ngx-Var-Key
X-ElasticPress-Query
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Log-Origin
X-Miniprofiler-Ids
Ngx
CACHE-MISS-TO-ORIGIN
X-Udemy-Cache-App-Namespace
X-CF-Cache-Header-Vary
X-CF-Cache-Header-Cache-Control
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X-Fastly-Cache-Hits
X-Cdn-Cache-Status
Vha6-Origin
X-Vc
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X-Snapshot-Date
X-RAMCache