Threat Level: green Handler on Duty: Brad Duncan

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
X-XSS-Protection
Accept-Ranges
Expect-CT
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-Served-By
CF-Ray
X-Download-Options
X-Xss-Protection
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Varnish
X-Request-Id
X-Adblock-Key
Access-Control-Allow-Credentials
X-FRAME-OPTIONS
X-Permitted-Cross-Domain-Policies
X-Request-ID
X-AspNet-Version
Alt-Svc
X-Runtime
Content-Security-Policy-Report-Only
X-Drupal-Cache
X-DNS-Prefetch-Control
X-Generator
X-Check
X-Cache-Status
X-Cacheable
Timing-Allow-Origin
X-Envoy-Upstream-Service-Time
X-Iinfo
X-Content-Security-Policy
X-Drupal-Dynamic-Cache
Feature-Policy
Content-Encoding
Access-Control-Expose-Headers
Status
Upgrade
X-CDN
X-AspNetMvc-Version
P3p
Access-Control-Max-Age
X-Via
Server-Timing
Request-Context
X-Robots-Tag
X-Turbo-Charged-By
X-UA-Device
X-Amz-Request-Id
X-Cache-Group
X-Dns-Prefetch-Control
X-Amz-Id-2
EagleId
X-Backend
X-AH-Environment
X-Proxy-Cache
Keep-Alive
X-Server
X-Ws-Request-Id
X-Ua-Compatible
X-Age
Cf-Edge-Cache
Host-Header
X-Hacker
X-Vhost
X-Server-Powered-By
X-Rq
X-Varnish-Cache
X-Dispatcher
X-Amz-Version-Id
Grace
Allow
X-Swift-CacheTime
X-Swift-SaveTime
X-OneAgent-JS-Injection
Ali-Swift-Global-Savetime
X-LiteSpeed-Cache
X-WebKit-CSP
X-Page-Speed
X-Styx-Req-Id
X-Pantheon-Styx-Hostname
Cf-Apo-Via
X-Device
Cf-Railgun
Accept-CH
X-Aws-Lambda-Call-Status
X-Pingback
X-Node
X-Server-Id
X-Host
X-Ruxit-JS-Agent
EagleEye-TraceId
Surrogate-Control
X-Nginx-Cache-Status
X-Akam-SW-Version
X-Readtime
Request-Id
X-Backend-Server
X-Content-Security-Policy-Report-Only
X-HW
X-Cache-Lookup
X-Cache-Spec
Accept-Ch-Lifetime
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-Trace
X-Response-Time
X-Application-Context
X-Cloud-Trace-Context
Permissions-Policy
X-Nginx-Upstream-Cache-Status
Fastly-Restarts
X-Edge
X-WebKit-CSP-Report-Only
X-Mod-Pagespeed
Content-Location
X-Mcache
Accept-CH-Lifetime
X-MS-InvokeApp
X-Content-Type
X-Country
X-Url
X-Litespeed-Cache
X-Clacks-Overhead
X-Vname
X-TtlSet
X-PC
X-CST
X-Midtier
X-Amz-Server-Side-Encryption
Rating
RTSS
Cache-Tag
X-ESI
X-Vcap-Request-Id
X-D2id
X-Rack-Cache
X-Element-Page-Cache
X-Kinja-Server
X-Kinja-Revision
X-Cdn-Fetch
X-GoogleNews-Bot
X-Kinja
X-Exp-Variant
X-Exp-Id
X-Use-Magma
X-Kinja-Build
Origin-Trial
Verso
X-VARITI-CCR
X-Server-Name
X-GitHub-Request-Id
X-ECACHE
X-Ac
Service-Worker-Allowed
X-Powered-By-Plesk
X-Cnection
X-Amz-Rid
X-SharePointHealthScore
SPRequestGuid
X-Client-IP
X-Navigation-Version
X-Ttl
Xkey
X-Abt-Application-Version
Edge-Control
SPRequestDuration
SPIisLatency
X-Upstream
X-Cache-TTL
X-B3-TraceId
Arr-Disable-Session-Affinity
X-Cached
X-Mg-S
X-Erf-Bev-Bev
X-Dw-Request-Base-Id
X-Server-Lifecycle-Phase
X-Kraken-Loop-Name
X-Browser-Type
X-Instrumentation
X-Erf-Bev-Bev-Is-Generated
X-NWS-LOG-UUID
X-Varnish-TTL
X-FastCGI-Cache
X-Px
X-Middleton-Display
X-Sol
Display
Pagespeed
Accept-Ch
X-NF-Request-ID
X-SRCache-Fetch-Status
X-SRCache-Store-Status
Access-Control-Request-Method
X-Forwarded-For
Edge-Cache-Tag
X-Cache-Key
X-Country-Code
X-Correlation-Id
X-Goog-Hash
X-Powered-CMS
X-Ser
X-Id
Content-MD5
X-Ratelimit-Limit
Front-End-Https
AR-SID
AR-CACHE
X-Webkit-Csp
AR-Request-ID
AR-ATIME
AR-PoweredBy
Public-Key-Pins
TCN
X-Version
X-Jurisdiction
X-HP-Webp
X-HP-Trace-Id
X-Amzn-Trace-Id
X-Content-Digest
X-MSEdge-Ref
X-Recruiting
X-T
X-RateLimit-Remaining
X-Middleton-Response
Response
X-Accel-Expires
TP-Cache
TP-L2-Cache
X-Shield-Request-Id
MicrosoftSharePointTeamServices
S
Cache-Status
Nginx-Cache
X-XRDS-Location
X-Daa-Tunnel
X-Request-Received
X-Request-Processing-Time
X-HS-Hub-Id
X-HS-Cache-Config
X-HS-Combine-CSS
X-HS-Content-Id
Server-Node
Cache-Tags
Cross-Origin-Opener-Policy
X-B3-TraceId-Primal
MRF-Tech
X-Fastly-Request-ID
Mrf-Cache-Status
X-Distributor
X-Hits
X-Ratelimit-Remaining
X-Edge-Location-Klb
X-LB-Cache
X-Kinsta-Cache
X-Fastcgi-Cache
X-Origin-Server
X-Ua-Browser
X-PressLabs-Stats
X-Ratelimit-Reset
X-TEC-API-VERSION
X-TEC-API-ROOT
X-Ezoic-Cdn
X-TEC-API-ORIGIN
Alternate-Protocol
Fastcgi-Cache
Filterid
X-ORACLE-DMS-RID
X-ORACLE-DMS-ECID
X-Grace
X-LLID
X-Frontend
X-Microsite
X-Request-Handler-Origin-Region
X-Rid
X-DIS-Request-ID
Server-Name
X-Geo-Country
Healthy
X-FB-Debug
X-Logged-In
X-Hostname
X-Varnish-Backend
X-Git-Hash
X-NGENIX-Cache
Realpath
Cleartype
X-Www-Served-By
X-Debug-Info
X-Load-Cache
Payment
X-Page-Id
X-Cluster-Name
DC
X-Forwarded-Proto
X-Protected-By
MS-Author-Via
Access-Control-Allow-Method
Content-Disposition
X-ASPNET-VERSION
X-Origin-Cache
X-ECache
X-DataDome
X-B3-Sampled
Charset
X-Goog-Metageneration
X-GUploader-UploadID
X-Upgrade-Enabled
X-TTL
X-Activity-Id
X-AppVersion
X-Az
X-Kong-Upstream-Latency
X-Kong-Proxy-Latency
X-Proxy
X-Seen-By
Count-Hit
X-F-Cache
X-Times
X-Amz-Meta-S3cmd-Attrs
X-Amz-Replication-Status
X-Fb-Rlafr
Paypal-Debug-Id
Cross-Origin-Resource-Policy
X-Azure-Ref
X-Revision
X-Whom
X-Contextid
X-Type
X-B
X-Request-Guid
X-Akamai-Edgescape
X-Route-Name
Viewport
Surrogate-Key
X-App-Environment
X-Aspnet-Duration-Ms
X-Flags
X-Providence-Cookie
X-Is-Crawler
X-Cache-Age
Retry-After
Accept-Charset
X-B3-Traceid
X-Wix-Request-Id
X-TT
X-Varnish-Server
X-Hosted-By
X-Aspnetmvc-Version
X-Signature
X-B-Cache
X-DynaTrace
X-Language
X-Cache-Control
X-Envoy-Decorator-Operation
X-App-Server
X-Source
X-Mobile
Amp-Access-Control-Allow-Source-Origin
X-Oracle-Dms-Ecid
X-Varnish-Grace
X-Magnolia-Registration
X-Oracle-Dms-Rid
X-VCache
X-Goog-Generation
X-Goog-Storage-Class
X-Goog-Stored-Content-Encoding
X-Goog-Stored-Content-Length
Host
WPO-Cache-Status
WPO-Cache-Message
Version
Referer-Policy
X-N
X-XRDS-LOCATION
Refresh
X-Server-ID
X-HTML-Minification-Powered-By
X-Cache-Rule
X-Tumblr-User
X-Cache-Time
X-Tumblr-Pixel-1
X-Tumblr-Pixel
Access-Control-Request-Headers
X-Response-Served-From
X-Amzn-RequestId
X-Original-Request-Id
X-Tumblr-Pixel-0
X-Amz-Apigw-Id
X-EdgeConnect-Cache-Status
X-Varnish-Age
X-Rule
X-Cache-Status-Check
X-Cacheable-TTL
X-UUID
X-Cache-Grace
X-Framework
Ms-Operation-Id
Protected
X-G
SD-X-WS
X-Content-Powered-By
MS-CV
X-RTag
X-Trace-Id
X-Jobs
Section-Io-Cache
From-Origin
X-Environment-Context
X-FW-Type
X-FW-Static
X-FW-Server
X-L-Path
X-ProcessESI
X-User-Agent
X-RemovedCookies
X-FW-Serve
X-FW-Version
X-Backend-Name
X-FW-Hash
X-Device-Type
X-FW-Dynamic
GEO-INFO
X-Page-View
NGB
X-Status
X-Tt-Trace-Tag
VIX-Pulpo-Node
VIX-Pulpo-Upstream-Status
Akamai-GRN
CDN-RequestId
X-Tt-Trace-Host
X-Rendered-As
X-Drupal-Cache-Contexts
X-Akamai-Request-ID2
X-Adobe-Content
X-Drupal-Cache-Tags
X-Http-Reason
X-Instance
X-NYM-Debug-Backend
X-Is-Bot
X-Adobe-Loc
X-Cache-Expired-At
X-Varnish-Ttl
Front
X-Region
X-Servername
X-Nginx-Cache
Url
X-Unique-Id
X-COUNTRY
X-Fastly-Request-Id
Pinterest-Version
Pinterest-Generated-By
X-Pinterest-Rid
Accept-Language
Liferay-Portal
SRV
X-Content-Options
Fastly-SIE
Fastly-SWR
X-Debug-IsConnected
X-Debug-IsPreview
X-Template
X-Zen-Fury
X-CDN-Forward
Backend
X-Cache-Hit
X-Yottaa-Metrics
X-Air-Trace-Id
X-Yottaa-Optimizations
X-Air-Hostname
X-Air-Source
X-RateLimit-Limit
X-Time
X-Newrelic-App-Data
X-DynaTrace-JS-Agent
Country
X-Mode
X-Rocket-Nginx-Serving-Static
Content-Secure-Policy
X-Cache-Operation
Node
X-Cache-Server
Webserver
X-Edge-Location
X-IPS-LoggedIn
Onion-Location
X-Content-Age
X-Generation-Time
X-Uri
X-Amzn-Remapped-Content-Length
X-RN-RSRV
S-Rt
X-Tumblr-Pixel-2
X-Rewrite-Enabled
X-UPSTREAM-Address
Filters
Meta-Geo
X-Proxy-Cache-Info
Selected-Fe
X-Tb
X-ARC
X-Timing-Wait
X-Locale
CF-IPCountry
Uber-Trace-Id
X-Tumblr-Pixel-3
Azure-SlotName
Azure-SiteName
Azure-RegionName
Azure-InstanceId
Cache-Hits
X-Web-Node
X-PHP-Backend
Azure-Version
X-Proxy-Build
X-Ms-Request-Id
X-Labrador-Cache-Channel
Countrycode
X-BYPASS-REASON
X-Cache-Action
X-Cms-Context
WP-Super-Cache
Cache-Name
X-Origin-Date
X-Ms-Version
X-Soup
X-PHP-Host
X-Skip-Cache
X-Sucuri-Cache
X-Sucuri-ID
X-ProxyCache-Status
X-Ua
X-Via-Fastly
X-Say-Cacheable
X-Proto
X-ProxyCache-Key
X-Say-TTL
X-Site-Version
X-SayCDN-TTL
X-Server-W
X-Origin-Hint
TWC-Device-Class
X-Sql-Count
Webcakes-App-Name
Webcakes-App-Version
X-Access
Webcakes-Region
X-Zipkin-Id
X-Sql-Duration-Ms
TWC-Privacy
TWC-Locale-Group
TWC-GeoIP-LatLong
X-VC-Cache
Property-Id
X-Handled-By
X-Proxy-Cache-Status
TWC-Connection-Speed
X-Reqid
X-Extlb
X-Debug
X-Varnish-Beresp-Grace
X-UA-Device-Type
X-Forwarded-Host
X-Format
X-Section
X-Cluster-Node
X-Routing-Service
TWC-GeoIP-Country
X-Proxied
X-Real-IP
ServerID
X-Cache-Host
X-Optimistic-Header
X-R9-Blue-Green-Version
ServedBy
X-IPLB-Request-ID
X-VWS-Id
X-FB-TRIP-ID
X-SaId
X-JoinUs
X-LAGOON
X-LJ-Flow-ID
X-IPLB-Instance
X-Adobe-Source
X-AWS-Id
Cache-Tv-Group
Web-Mar-Node
DB-Nickname
Cross-Origin-Window-Policy
X-App-Version
X-Cache-TTL-Remaining
X-No-Session
X-Detected-As
X-Urbn-Site-Id
Mn-Server-Ip
X-Urbn-Context-Path
X-Cluster
Apigw-Requestid
Locale
X-GeoCode
X-GeoCountry
Fastcgi-Useragent
X-LSADC-Cache
X-WP-CF-Super-Cache-Cache-Control
X-WP-CF-Super-Cache
X-Node-Name
X-Ruxit-Js-Agent
X-Xfnlog-Site
X-Director
Mime-Version
X-Tec-Api-Origin
Source
X-Tec-Api-Root
X-Tec-Api-Version
Upgrade-Insecure-Requests
X-Tt-Logid
Frame-Options
X-Varnish-Hits
X-TIME
X-Oneagent-Js-Injection
X-GEO
CDN-Uid
CDN-Cache
CDN-CachedAt
CDN-RequestCountryCode
CDN-EdgeStorageId
X-Hl-Ver
CDN-PullZone
X-Generated-By
X-Buckets
Fastly-Drupal-HTML
X-Request-Time
X-Varnish-Cache-Hits
X-Mg-Request-UUID
X-FireWall-Port
Load-Balancing
Xet-Cookie
X-Redis-Cache
X-Varnish-Hostname
X-ServerID
X-RM-Cache-TTL
X-SRV
X-Origin-CC
X-Origin-TTL
X-Loop
X-Api-Version
X-Datadog-Parent-Id
X-Datadog-Sampled
X-Datadog-Sampling-Priority
X-Datadog-Trace-Id
X-TA-CDN-Provider
X-Cache-Debug
X-URL
CF-Cached-On
X-Akamai-Transformed
X-Sorting-Hat-ShopId
X-Storefront-Renderer-Rendered
X-Tx-Id
X-Served-From
X-Sorting-Hat-PodId
X-Alternate-Cache-Key
X-ShardId
X-Shopify-Stage
X-ShopId
X-Pubstack
X-Storage
X-Pass-Why
X-Endurance-Cache-Level
X-Newrelic-Synthetics
Xserver
X-Request-Host
X-Restarts
X-Service
X-Location
X-Provided-By
Server-Info
X-External-Request-Id
X-Ec-Fail
X-Ec-GeoHdr
BehaviorPad-Version
X-A-Dam
A
X-Epic-Correlation-Id
Surrogated-Key
T-Server
X-Httpd
Thinkindot-Control
X-INCAP-ABP
X-A
X-Level-Front-Cache
WWW-Authenticate
Thinkindot-CacheControl-Type
Thinkindot-CacheControl
X-A-Ccd
X-Generated-On
X-Hash
Cache-Host
TDXMobile
X-Gdpr
X-Developer
MD5-Digest
Memcached
X-Cache-Date
Meta-Geo-Continent
Lang
X-Cache-Info
X-Cache-NE
Release
Redirect-Candidate
X-Bip
Ngx.Var.Host
X-Application
X-B-Cookie
Origin
X-Bc-Bl
X-BCube-Filmed-By
X-Akamai-Device-Characteristics
NM-Fastcgi-Cache
Odigeo-Trace-Id
Host-ID
X-Cdn-Origin
X-A-Wwc
Server-Host
DCR-Processing-Time-Ms
X-A-Dgt
DCR-Decision-By
Candidate-Md5Url
X-Destination
Sslversion
X-D
X-CUA
X-Conf
X-CMSURLCustom
Gannett-Cam-Experience-Id
X-Core-Mission
Rendered-Blocks
X-Aed
DSUID
Edge-Cache
X-A-Dcw
X-Men
X-S-Maxage
X-Nyt-Route
X-S-Cookie
X-S
X-Thinkindot-L3
X-Sigma-Backend
X-ScT
X-Thanos
X-TIM-N
X-Origin
X-Test
X-Sigma
X-Vdms-Path
X-Processor
X-Vdms-Version
X-Sn-Servicetimems
X-Loc
Xc-Version
X-Origin-Time
X-Mid
X-We-Are-Hiring
X-CSRF-Token
X-Mobile-URL
X-Rojux
X-Rocket-Build-Number
X-SRCache-Key
X-WP-CF-Super-Cache-Active
X-TNCMS
Mail-Subject
X-Cache-Id
Magicmarker
X-Correlation-ID
X-Date
X-DefElseHash
X-DefHash
Cmstype
Fastly-Backend-Name
Fastly-GeoIP-CountryCode
X-SD-PageType
Gh-Request-Id
X-Scale
Is-Eu
X-SVT-ORM-VERSION
X-Varnishpool
X-Accel-Expires-Debug
X-Ad-Defer-Variation
X-Varnish-Remaining-TTL
Req-Svc-Chain
X-Vmg-Version
X-VServer
Tube-Got-Results
Tube-Return
Tube-Got-Eval
Tube-Get-Contents
X-Worker
X-Varnish-CookieINHashed-On
X-Varnish-CookieHashed-On
X-SVT-ORM-RULES
Cmsid
X-CACHE-AGE
X-Cache-Bucket
X-Slack-Shared-Secret-Outcome
X-BBC-Edge-Cache-Status
X-Auto-Login
X-Air-Pt
X-Variation
Platform
X-Var-Ttl
X-Slack-Backend
X-Req
X-Org
X-Origin-Expires
X-Geo-Header
X-GeoIP
X-GeoIP-City
X-Gamma-Serve
X-Region-Sid
X-Platform
X-Esi-Check
X-Fastly-Cache
X-Fetched-On
X-Gzip
X-Has-Esi
Section-Io-Origin-Time-Seconds
Section-Io-Origin-Status
Section-Origin-Responded
X-JWT-State
We-Hiring
Section-Io-Id
X-Is-Gdpr
X-Node-Id
X-HS-Content-Campaign-Id
X-Human
X-Mvc-Supplant-Cachable
Adler-Geo
X-Origin-Response-Time
X-Pool
X-Ec-Custom-Error
C-Via
X-Platform-Cluster
X-Platform-Processor
X-Dispatcher-Server
Cache-Key
X-Platform-Router
CloudFront-Viewer-Country
CacheControlHeader
Click-Count-Error
Click-Count-Action-Start
AKAMAI
X-Dispatcher-Number
HostName
Environment
X-Instance-Name
X-Core-Value
X-Nginx-Cache-Key
X-Irp-Debug
X-Accel-Buffering
X-Wix-Viewer-Type
Expect-Staple
X-Response-By
X-Release
Web-Mar-Region
X-Qloud-Router
X-Developers
X-WA-Info
X-WADP-Cache
X-Mly-Id
X-Device-Os
X-GeoIP-Country-Code
X-Owner
X-Fastly-Backend
X-FC-Vary-Parameters
X-Cdn-Srv
X-Planisys-CDN-Cache
X-Planisys-CDN-Rules
X-Cache-Tags
X-CacheTTL
X-Planisys-CDN-TTL
X-Cache-FS-Status
X-Fmm-Version
X-Forwarded-Site
X-DPWN-IS-SECURE
X-Varnish-Beresp-Status
X-Server-IP
X-GeoIP-Region-Code
X-Clara-WADP
X-Azure-Ref-OriginShield
X-Frame-Option
X-Ckpd-Fst-Backend
X-V-Cache
X-NodeID
X-App
Origin-EX
Origin-CC
Canary
X-Varnish-Beresp-Ttl
Producers
Machine
On-Server
Ssr
Country-Code
Vix-Hermes-Req-Id
X-Vcl-Version
Kp-EeAlive
Datacenter
X-Via-CDN
L
Apple-News-Services-Parsed-Url
Apple-News-Services-Host
X-SB
Apple-News-Services-Request-Url
X-Request-Start
X-Hnp-Log
X-HN
X-Old-Content-Length
X-Minions-Version
X-NCache
X-VarnishDD-TTL
X-Gen-Mode
X-Zone
X-Platform-Server
X-Op-Id-All
X-VG-TLSProxy
Apple-News-Services-Handled
Cache-Provider
Sever-Int
X-Block-Status
Server-Hostname
Server-Ext
X-Aicache-OS
PFcat
State
User-Cache-Control
NGX
Wxu-Next-Region
Wxu-Next-Commit
Wxu-Next-Hostname
X-Via-SSL
Edge-Copy-Time
X-Parent-Response-Time
X-Via-Edge
CDCHOST
X-Cache-Remote
X-FL-QIT-DEBUG
HA-Ipaddr
Ha-Gx-Prefs
X-Eu-Site
X-Ua-Device
X-CGP
X-From
X-FL-EDGE
X-Mvc-Supplant-OutputCached
Srvid
X-Nananana
Locid
L5d-Success-Class
X-Microcachable
Fastly-SSL
X-Csrf-Jwt
X-VC
X-Webkit-CSP-Report-Only
X-B3-Spanid
X-Up
X-LB-NoCache
X-Cache-Enabled
X-Refresh
X-DC
X-Debug-Cache-Store
X-RCS-CacheZone
X-Dc
Pics-Label
X-Cache-Backend
X-Debug-Cache-Fetch
X-Tb-Optimization-Total-Bytes-Saved
Env
X-VCT
X-ND-Cache
X-Cached-By
Cluster
X-Generated-In
Decoy-Debug-Key
X-Lambda-Id
Decoy-Debug-TTL
GeoIP-Latitude
Decoy-Debug-Status
NtCoent-Length
X-Trace-ID
X-Presslabs-Stats
Sid
X-B3-SpanId
CPC-Cache
VNS-Age
X-Edge-Pop
Cache
X-Via-Poph
X-Via-Popn
X-Via-Popv
X-HS-Status
X-Tid
X-NWS-UUID-VERIFY
X-Render-Time
X-Vtex-Remote-Cache
VNS-Cache
CPC-Age
AMP-Access-Control-Allow-Source-Origin
X-Cs
X-Upstream-Ct
X-Upstream-Ht
SID
X-CCDN-CacheTTL
Memory
X-Hcs-Proxy-Type
X-CCDN-Origin-Time
Time
Fastly-Drupal-Html
X-Cache-Type
X-NewRelic-App-Data
X-Webkit-CSP
X-Servedbyhost
X-HA-Backend
X-TH-Server
X-DataCenter
X-LB-ID
X-Srv
X-Esi
X-AIR-PT
X-Via-JSL
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X-Wa
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Svr
X-Vgn-Hpd-Ssi
GeoIp-Country-Code
X-Vgn-Hpd-Cached
X-ATG-Version
X-Cache-ASPX
Server-ID
X-CLOUD-TRACE-CONTEXT
X-Contensis-Viewer-Groups
X-Check-Cacheable
X-Client-Ip
X-Varnish-Authentication
Cdn
Srv
True-Client-IP
X-ZONE
Uri
X-Vc
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X-Fpc
X-RateLimit-Remaining-Second
X-CF-Lambda-Fn
X-RateLimit-Limit-Second
X-MP-GENERATED-AT
X-PAYTM-SRV-ID
X-Amz-Meta-Cb-Modifiedtime
X-CF-Lambda-Version
X-Proxy-CacheRZ
XkeyRZ
X-NGINX-Cache
X-Varnish-Beresp-TTL
Hostname
X-CS
XServer
X-Udemy-Cache-App-Namespace
X-Gateway-Request-Id
Cdncip
X-Gateway-Cache-Key
N-Cache
X-Gateway-Cache-Status
M-TraceId
X-CSRF-TOKEN
X-Gateway-Skip-Cache
Cdnsip
X-Nf-Request-Id
X-AK-Request-ID
X-API-Version
Resin-Trace
X-CACHE-KEY
X-CDN-Cache-Status
YJS-ID
X-EC-Lua
X-Datadome
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X-Tenant
OT-Force-Account-Verify
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X-Via-NSCOPI
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X-FPC
Lb
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True-Client-Ip
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X-Policy
Eomportal-Instance
X-B3-Trace-ID
CDN
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Sm-Log-Id
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Server-Id
X-APP-VERSION
GeoIP-Country-Code
X-Micro-Cache
X-WA
Ngx-Var-Key
X-Cache-Ttl
X-Logging-Id
Path
Hit
IsBot
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X-NC
X-Lb-Id
X-Vcache
X-SIPLIST1
X-Git-Commit
X-Container-Uri
LB
X-Ha-Backend
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X-MCACHE
X-Datacenter
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X-Cache-NGX
X-Edge-POP
X-RateLimit-Reset
X-ServedByHost
X-Info
X-Cdn-Forward
X-Tncms
HIT
X-Cdn-Cache-Status
Pramga
RATING
Location
X-SERVER-NAME
Cross-Origin-Opener-Policy-Report-Only
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X-Geo
X-Akamai-Pragma-Client-IP
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Ohc-File-Size
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X-VG-WebCache
XM
FSS-Cache
Geoip-Latitude
V-Age
Timeexpire
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X-Acquia-Purge-Cdn-Unconfigured
X-TT-LOGID
Tcn
X-Lb-Nocache
Epwk-X-Cache
True-Client-Country-4JS
ENV
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Yjs-Id
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CDN-RequestPullSuccess
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CDN-RequestPullCode
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X-Rebelmouse-Surrogate-Control
X-Wp-Cf-Super-Cache
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X-Oss-Storage-Class
X-Oss-Server-Time
X-Hyper-Cache
X-Cdn-Request-ID
X-Dw-Trace-Id
Proxy-Connection
X-Oss-Request-Id
Servername
X-Amz-Meta-Opti
X-Cache-Expires
X-Oss-Object-Type
X-Oss-Hash-Crc64ecma
X-Fastly-Backend-Reqs
Warning
X-M-Log
X-M-Reqid
X-Swift-Error
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X-UP
W
Content-Script-Type
Content-Style-Type
X-B3-Parentspanid
WZWS-RAY
Ec-Rule-Version
X-Acquia-Site
X-Qnm-Cache
X-Acquia-Application-Trace
X-Acquia-Purge-Tags
X-Acquia-Application-UUID
X-MiniProfiler-Ids
X-Lsadc-Cache
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X-F-Status
X-Akamai-ERRuleID
Ohc-Cache-HIT
PICS-Label
X-B3-ParentSpanId
X-Akamai-ERPolicy
X-IPS-Cached-Response
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X-Fastly-Cache-Hits
Ngx
X-Cache-Ngx
X-Th-Server
X-Moov-Xdn-Version
X-Moov-T
X-Scheme
My-App
X-Mg-Cache
X-Litespeed-Cache-Control
X-Webstats-RespID
MIME-Version