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
Expires
X-Frame-Options
Content-Length
Strict-Transport-Security
X-Content-Type-Options
Link
Last-Modified
Cf-Request-Id
CF-Cache-Status
ETag
Accept-Ranges
Pragma
Expect-CT
X-Powered-By
X-XSS-Protection
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
X-Xss-Protection
P3P
X-UA-Compatible
X-Served-By
X-Download-Options
CF-Ray
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Varnish
X-Adblock-Key
X-Request-ID
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-Check
X-Generator
X-Cache-Status
X-Cacheable
Timing-Allow-Origin
X-Iinfo
X-Envoy-Upstream-Service-Time
X-Content-Security-Policy
X-Drupal-Dynamic-Cache
Feature-Policy
Content-Encoding
Access-Control-Expose-Headers
Upgrade
Status
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
Expect-Ct
EagleId
X-Amz-Id-2
X-Backend
X-AH-Environment
X-Proxy-Cache
Keep-Alive
X-Ua-Compatible
X-Server
X-Dns-Prefetch-Control
X-Ws-Request-Id
X-Age
Host-Header
Cf-Edge-Cache
X-Hacker
X-Vhost
X-Server-Powered-By
X-Rq
X-Varnish-Cache
X-Dispatcher
X-Amz-Version-Id
Grace
Allow
X-Swift-SaveTime
X-Swift-CacheTime
Ali-Swift-Global-Savetime
X-OneAgent-JS-Injection
X-LiteSpeed-Cache
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Page-Speed
Cf-Apo-Via
X-Device
X-WebKit-CSP
Cf-Railgun
Accept-CH
X-Aws-Lambda-Call-Status
X-Node
X-Pingback
X-Host
X-Ruxit-JS-Agent
X-Server-Id
EagleEye-TraceId
X-Nginx-Cache-Status
Surrogate-Control
X-Akam-SW-Version
X-Cache-Spec
X-Backend-Server
Request-Id
X-Readtime
X-Cache-Lookup
X-HW
Accept-Ch-Lifetime
X-Content-Security-Policy-Report-Only
X-Cloud-Trace-Context
X-EdgeConnect-MidMile-RTT
X-EdgeConnect-Origin-MEX-Latency
X-Trace
X-Application-Context
X-Response-Time
Fastly-Restarts
Permissions-Policy
X-Nginx-Upstream-Cache-Status
X-Mod-Pagespeed
X-Edge
X-WebKit-CSP-Report-Only
X-Mcache
X-Content-Type
Content-Location
X-Url
X-MS-InvokeApp
X-CST
X-Country
Accept-CH-Lifetime
X-Clacks-Overhead
X-Midtier
X-TtlSet
X-Vname
X-PC
X-Amz-Server-Side-Encryption
X-Litespeed-Cache
Rating
RTSS
Cache-Tag
X-Vcap-Request-Id
X-ESI
X-VARITI-CCR
X-D2id
X-Element-Page-Cache
Origin-Trial
X-ECACHE
X-Server-Name
Verso
X-Kinja-Revision
X-Kinja-Server
X-Use-Magma
X-Kinja-Build
X-Kinja
X-Exp-Id
X-Exp-Variant
X-GoogleNews-Bot
X-Cdn-Fetch
X-Rack-Cache
X-Ac
X-GitHub-Request-Id
X-Cnection
X-Powered-By-Plesk
Service-Worker-Allowed
SPRequestGuid
X-SharePointHealthScore
X-Client-IP
X-Amz-Rid
X-Navigation-Version
X-Ttl
Xkey
X-Abt-Application-Version
X-B3-TraceId
Edge-Control
X-Cache-TTL
X-NWS-LOG-UUID
SPRequestDuration
SPIisLatency
X-Upstream
Arr-Disable-Session-Affinity
X-Varnish-TTL
X-Webkit-Csp
X-Kraken-Loop-Name
X-Erf-Bev-Bev
X-Instrumentation
X-Browser-Type
X-Erf-Bev-Bev-Is-Generated
X-Server-Lifecycle-Phase
X-Cached
X-Mg-S
X-Dw-Request-Base-Id
X-Px
Accept-Ch
X-Correlation-Id
Pagespeed
X-Middleton-Display
X-Sol
Display
X-Cache-Key
X-SRCache-Fetch-Status
X-SRCache-Store-Status
X-NF-Request-ID
Access-Control-Request-Method
Edge-Cache-Tag
Content-MD5
X-Forwarded-For
X-Country-Code
X-Goog-Hash
X-FastCGI-Cache
Front-End-Https
X-Powered-CMS
X-Version
X-Id
AR-SID
AR-PoweredBy
AR-Request-ID
AR-ATIME
AR-CACHE
Public-Key-Pins
X-HP-Trace-Id
X-Jurisdiction
TCN
X-HP-Webp
X-RateLimit-Remaining
X-T
X-Content-Digest
X-Recruiting
X-MSEdge-Ref
X-Ratelimit-Limit
X-Daa-Tunnel
X-Ser
X-Amzn-Trace-Id
X-XRDS-Location
X-Accel-Expires
Response
X-Middleton-Response
TP-Cache
TP-L2-Cache
X-Shield-Request-Id
MicrosoftSharePointTeamServices
S
Nginx-Cache
X-Fastcgi-Cache
Cache-Status
X-B3-TraceId-Primal
X-Request-Processing-Time
X-Request-Received
Mrf-Cache-Status
MRF-Tech
X-HS-Cache-Config
X-HS-Hub-Id
X-HS-Content-Id
X-HS-Combine-CSS
Server-Node
Cache-Tags
X-Distributor
X-Hits
X-Kinsta-Cache
X-Edge-Location-Klb
X-Ratelimit-Remaining
X-LB-Cache
Fastcgi-Cache
X-Origin-Server
X-PressLabs-Stats
X-Ratelimit-Reset
Cross-Origin-Opener-Policy
Alternate-Protocol
X-Ua-Browser
X-Grace
X-Ezoic-Cdn
Server-Name
X-TEC-API-ROOT
X-TEC-API-ORIGIN
X-TEC-API-VERSION
X-DIS-Request-ID
Filterid
X-Request-Handler-Origin-Region
X-Geo-Country
X-Microsite
X-Protected-By
X-Rid
Healthy
X-LLID
X-Frontend
X-Varnish-Backend
X-DataDome
X-Git-Hash
X-Logged-In
Cleartype
X-ORACLE-DMS-ECID
X-ORACLE-DMS-RID
X-FB-Debug
X-Fastly-Request-ID
X-Debug-Info
X-Www-Served-By
X-Page-Id
X-Forwarded-Proto
Payment
X-Load-Cache
X-NGENIX-Cache
X-Hostname
X-ASPNET-VERSION
X-Origin-Cache
X-Cluster-Name
DC
MS-Author-Via
Content-Disposition
Realpath
Access-Control-Allow-Method
X-TTL
X-B3-Sampled
Charset
X-GUploader-UploadID
X-Goog-Metageneration
X-Upgrade-Enabled
X-Proxy
X-Kong-Proxy-Latency
X-Kong-Upstream-Latency
X-AppVersion
X-Az
X-Activity-Id
X-F-Cache
X-ECache
X-Seen-By
Retry-After
X-Amz-Replication-Status
X-Server-ID
Paypal-Debug-Id
X-VCache
Cross-Origin-Resource-Policy
X-Amz-Meta-S3cmd-Attrs
X-Azure-Ref
X-Fb-Rlafr
X-Whom
X-Type
X-Providence-Cookie
Viewport
X-Aspnet-Duration-Ms
X-Flags
X-Is-Crawler
X-Request-Guid
X-Route-Name
X-Hosted-By
X-Wix-Request-Id
Surrogate-Key
Count-Hit
X-Revision
X-Aspnetmvc-Version
X-Contextid
X-App-Environment
X-B-Cache
X-B
Accept-Charset
X-Signature
X-Varnish-Server
X-TT
X-Akamai-Edgescape
X-Cache-Age
X-DynaTrace
X-B3-Traceid
X-Language
Amp-Access-Control-Allow-Source-Origin
X-App-Server
X-Source
X-Cache-Control
X-Fastly-Request-Id
Referer-Policy
X-Oracle-Dms-Ecid
X-Oracle-Dms-Rid
X-Mobile
X-Goog-Storage-Class
X-Goog-Stored-Content-Length
X-Goog-Generation
X-Goog-Stored-Content-Encoding
X-Times
X-Magnolia-Registration
Host
X-Varnish-Grace
Version
X-Envoy-Decorator-Operation
X-N
X-Tt-Trace-Host
X-HTML-Minification-Powered-By
X-Tt-Trace-Tag
X-Tumblr-User
X-Tumblr-Pixel-1
X-Tumblr-Pixel-0
X-Cache-Rule
X-Response-Served-From
X-Original-Request-Id
X-Tumblr-Pixel
X-Cache-Time
Access-Control-Request-Headers
X-Varnish-Age
Ms-Operation-Id
MS-CV
Refresh
X-Rule
X-RTag
X-UUID
SD-X-WS
Section-Io-Cache
WPO-Cache-Message
WPO-Cache-Status
X-Framework
X-Cache-Status-Check
X-FW-Serve
X-User-Agent
Akamai-GRN
X-FW-Server
X-FW-Version
X-FW-Type
X-FW-Static
X-FW-Hash
X-FW-Dynamic
X-Backend-Name
X-Cache-Grace
X-Content-Powered-By
X-Cacheable-TTL
X-RemovedCookies
X-Page-View
X-EdgeConnect-Cache-Status
X-ProcessESI
X-Is-Bot
X-Rendered-As
X-Status
X-Drupal-Cache-Contexts
X-Device-Type
X-Cache-Expired-At
X-Jobs
X-Drupal-Cache-Tags
X-G
Protected
X-Servername
From-Origin
X-Http-Reason
X-Adobe-Content
X-Adobe-Loc
Url
X-Instance
GEO-INFO
X-NYM-Debug-Backend
X-Akamai-Request-ID2
X-L-Path
VIX-Pulpo-Upstream-Status
VIX-Pulpo-Node
X-Environment-Context
NGB
SRV
X-Amzn-RequestId
X-Template
X-Amz-Apigw-Id
X-RateLimit-Limit
CDN-RequestId
X-Trace-Id
X-Region
Front
X-COUNTRY
X-Varnish-Ttl
X-Nginx-Cache
X-Debug-IsConnected
X-CDN-Forward
X-Debug-IsPreview
X-XRDS-LOCATION
Accept-Language
X-Yottaa-Optimizations
X-Yottaa-Metrics
X-Unique-Id
X-Cache-Hit
X-Content-Options
Fastly-SWR
Fastly-SIE
X-Zen-Fury
Backend
Country
Liferay-Portal
X-Air-Trace-Id
X-Air-Hostname
X-DynaTrace-JS-Agent
X-Air-Source
X-Tb
X-Newrelic-App-Data
X-Pinterest-Rid
X-Mode
Pinterest-Generated-By
Pinterest-Version
Content-Secure-Policy
X-Node-Name
X-Real-IP
X-Cache-Operation
X-Proxy-Cache-Info
X-Amzn-Remapped-Content-Length
X-Rewrite-Enabled
Webserver
X-Cache-Server
X-Generation-Time
Filters
Meta-Geo
X-UPSTREAM-Address
X-RN-RSRV
X-Tumblr-Pixel-2
X-Content-Age
X-IPS-LoggedIn
Cache-Hits
Uber-Trace-Id
X-Ms-Request-Id
X-Proxy-Build
CF-IPCountry
X-Ms-Version
X-Timing-Wait
X-PHP-Backend
X-Time
Selected-Fe
Onion-Location
X-Web-Node
X-Proto
X-Debug
X-Sql-Duration-Ms
TWC-GeoIP-LatLong
X-Sql-Count
X-Server-W
X-Format
X-Tt-Logid
Webcakes-App-Name
X-Origin-Hint
Webcakes-Region
X-Access
Webcakes-App-Version
Property-Id
X-Locale
X-Sucuri-Cache
X-Sucuri-ID
Node
TWC-Privacy
TWC-GeoIP-Country
X-VC-Cache
Azure-InstanceId
X-TIME
Cache-Name
TWC-Connection-Speed
Azure-Version
X-Rocket-Nginx-Serving-Static
X-Reqid
X-R9-Blue-Green-Version
TWC-Locale-Group
X-Section
X-UA-Device-Type
Azure-RegionName
Azure-SiteName
TWC-Device-Class
Azure-SlotName
X-Adobe-Source
Web-Mar-Node
ServedBy
ServerID
X-Site-Version
X-ProxyCache-Key
X-Proxy-Cache-Status
X-ProxyCache-Status
S-Rt
X-LJ-Flow-ID
X-Say-TTL
X-VWS-Id
X-Soup
X-PHP-Host
X-Ua
X-SayCDN-TTL
X-Via-Fastly
X-Forwarded-Host
X-Skip-Cache
X-Cluster
X-Cluster-Node
X-Cache-Host
X-Cache-Action
X-BYPASS-REASON
X-Cms-Context
X-Handled-By
X-Say-Cacheable
X-Labrador-Cache-Channel
X-IPLB-Request-ID
X-IPLB-Instance
X-AWS-Id
X-Cache-TTL-Remaining
X-Detected-As
X-FB-TRIP-ID
X-Ruxit-Js-Agent
X-No-Session
X-Extlb
X-Origin-Date
X-SaId
X-Proxied
X-JoinUs
X-LAGOON
X-Tumblr-Pixel-3
X-Zipkin-Id
X-Routing-Service
X-Varnish-Beresp-Grace
X-WP-CF-Super-Cache
X-Edge-Location
Mn-Server-Ip
DB-Nickname
X-WP-CF-Super-Cache-Cache-Control
X-App-Version
X-Optimistic-Header
Locale
X-Xfnlog-Site
Apigw-Requestid
X-Urbn-Site-Id
Cross-Origin-Window-Policy
X-Urbn-Context-Path
X-Buckets
X-Uri
Mime-Version
WP-Super-Cache
Countrycode
Fastcgi-Useragent
X-GeoCode
X-LSADC-Cache
X-GeoCountry
X-Tec-Api-Root
X-Tec-Api-Origin
X-Tec-Api-Version
X-ARC
Source
CDN-CachedAt
X-Oneagent-Js-Injection
CDN-Cache
CDN-EdgeStorageId
CDN-PullZone
CDN-RequestCountryCode
CDN-Uid
X-Director
Cache-Tv-Group
X-Hl-Ver
X-Varnish-Hits
Upgrade-Insecure-Requests
X-Request-Time
X-Mg-Request-UUID
X-GEO
X-Generated-By
Fastly-Drupal-HTML
X-Redis-Cache
X-Cache-Debug
CF-Cached-On
X-SRV
Xet-Cookie
X-Loop
X-Tx-Id
X-Origin-CC
Frame-Options
X-FireWall-Port
X-Origin-TTL
X-URL
X-Pass-Why
X-Varnish-Cache-Hits
X-TNCMS
X-TA-CDN-Provider
X-RM-Cache-TTL
X-Varnish-Hostname
X-Shopify-Stage
X-Storefront-Renderer-Rendered
X-Alternate-Cache-Key
X-ShopId
X-Sorting-Hat-ShopId
X-Akamai-Transformed
X-ServerID
X-ShardId
X-Sorting-Hat-PodId
X-Datadog-Trace-Id
X-Datadog-Sampling-Priority
X-Datadog-Sampled
X-Datadog-Parent-Id
X-Api-Version
Load-Balancing
X-Service
X-Endurance-Cache-Level
X-Newrelic-Synthetics
X-Request-Host
X-Served-From
Xserver
X-Location
X-NWS-UUID-VERIFY
X-Pubstack
X-B3-Spanid
Release
Redirect-Candidate
BehaviorPad-Version
A
Sslversion
Server-Info
Surrogated-Key
T-Server
Origin
Rendered-Blocks
Odigeo-Trace-Id
Ngx.Var.Host
Host-ID
Lang
Meta-Geo-Continent
Memcached
Gannett-Cam-Experience-Id
Edge-Cache
Candidate-Md5Url
DCR-Decision-By
DCR-Processing-Time-Ms
DSUID
MD5-Digest
X-Cache-NE
X-Origin-Time
X-Nyt-Route
X-Processor
X-Rojux
X-S
X-Mobile-URL
X-Mid
X-Generated-On
X-Httpd
X-INCAP-ABP
X-Level-Front-Cache
X-S-Cookie
X-S-Maxage
X-Vdms-Path
X-Vdms-Version
X-We-Are-Hiring
Xc-Version
X-TIM-N
X-Thinkindot-L3
X-ScT
X-SRCache-Key
X-Test
X-Thanos
X-Gdpr
X-External-Request-Id
X-A-Dcw
X-A-Dam
X-A-Dgt
X-A-Wwc
X-Aed
X-A-Ccd
X-A
Thinkindot-CacheControl
Thinkindot-CacheControl-Type
Thinkindot-Control
WWW-Authenticate
X-Application
X-B-Cookie
X-Destination
X-Developer
X-Ec-Fail
X-Ec-GeoHdr
X-D
X-Conf
X-Bc-Bl
X-BCube-Filmed-By
X-Cache-Date
X-CMSURLCustom
TDXMobile
X-Bip
X-Storage
X-SD-PageType
X-Sigma-Backend
X-Sigma
X-Frame-Option
X-Rocket-Build-Number
CloudFront-Viewer-Country
Server-Host
X-Var-Ttl
CacheControlHeader
C-Via
Section-Io-Id
X-Core-Value
Cache-Host
Cache-Key
X-Restarts
X-CUA
X-GeoIP-City
X-Developers
X-Org
X-Origin
X-Origin-Response-Time
Gh-Request-Id
X-Node-Id
X-Fmm-Version
X-Fetched-On
X-Epic-Correlation-Id
Fastly-Backend-Name
X-JWT-State
Req-Svc-Chain
X-Is-Gdpr
X-Loc
X-Platform-Router
X-Platform-Cluster
X-Platform-Processor
X-Mvc-Supplant-Cachable
X-Clara-WADP
X-HS-Content-Campaign-Id
X-Akamai-Device-Characteristics
X-Hash
X-Auto-Login
X-Human
X-Cdn-Origin
X-Core-Mission
X-Geo-Header
X-Has-Esi
X-SVT-ORM-VERSION
We-Hiring
X-SVT-ORM-RULES
X-Sn-Servicetimems
X-GeoIP
NM-Fastcgi-Cache
X-Cdn-Srv
X-BBC-Edge-Cache-Status
Section-Io-Origin-Time-Seconds
Section-Origin-Responded
X-Cache-Info
Section-Io-Origin-Status
X-Varnishpool
Magicmarker
AKAMAI
X-Vmg-Version
X-VServer
X-WP-CF-Super-Cache-Active
Country-Code
X-Cache-Bucket
X-Worker
Mail-Subject
X-WA-Info
X-WADP-Cache
X-Varnish-Beresp-Ttl
X-Parent-Response-Time
X-CACHE-AGE
X-Forwarded-Site
X-Gen-Mode
X-DefElseHash
X-Ad-Defer-Variation
X-App
X-Azure-Ref-OriginShield
X-Accel-Buffering
Wxu-Next-Region
Wxu-Next-Commit
Wxu-Next-Hostname
X-Block-Status
X-Cache-Id
X-Ec-Custom-Error
X-Esi-Check
X-Dispatcher-Server
X-Device-Os
X-Cache-Tags
X-DefHash
X-FC-Vary-Parameters
X-Platform
State
X-Accel-Expires-Debug
X-CacheTTL
X-Wix-Viewer-Type
X-VG-TLSProxy
X-Varnish-CookieINHashed-On
X-Varnish-Remaining-TTL
X-VarnishDD-TTL
X-Date
X-Dispatcher-Number
X-Slack-Backend
X-Slack-Shared-Secret-Outcome
X-Men
X-Server-IP
X-Region-Sid
X-Fastly-Backend
X-Fastly-Cache
X-Gamma-Serve
X-Varnish-CookieHashed-On
X-Varnish-Beresp-Status
X-NCache
X-Nginx-Cache-Key
X-Old-Content-Length
X-Mly-Id
X-Irp-Debug
X-Gzip
X-HN
X-Hnp-Log
X-Op-Id-All
Web-Mar-Region
X-SB
X-Scale
X-Variation
X-Request-Start
X-Req
X-Platform-Server
X-Pool
X-Qloud-Router
X-GeoIP-Country-Code
X-GeoIP-Region-Code
Adler-Geo
Apple-News-Services-Handled
Apple-News-Services-Host
Apple-News-Services-Parsed-Url
Platform
PFcat
Origin-CC
Environment
X-CSRF-Token
Apple-News-Services-Request-Url
Datacenter
Sever-Int
CDCHOST
Server-Ext
Server-Hostname
Click-Count-Action-Start
Click-Count-Error
Ssr
Cache-Provider
Canary
Fastly-GeoIP-CountryCode
Origin-EX
Tube-Got-Results
Tube-Got-Eval
On-Server
Machine
Is-Eu
User-Cache-Control
Tube-Return
NGX
Tube-Get-Contents
Kp-EeAlive
X-LB-NoCache
X-Nananana
X-Tid
L5d-Success-Class
X-DPWN-IS-SECURE
L
X-Planisys-CDN-TTL
X-Planisys-CDN-Rules
X-Planisys-CDN-Cache
Cluster
Producers
Ha-Gx-Prefs
X-Eu-Site
X-Owner
Decoy-Debug-Key
X-NodeID
Decoy-Debug-TTL
Decoy-Debug-Status
HA-Ipaddr
Pics-Label
X-V-Cache
X-Ckpd-Fst-Backend
X-CGP
X-Cache-Remote
Cmsid
X-Origin-Expires
X-Csrf-Jwt
Vix-Hermes-Req-Id
Cmstype
X-Cache-Backend
X-Minions-Version
X-Instance-Name
X-Webkit-CSP-Report-Only
X-Cache-FS-Status
X-Refresh
X-Mvc-Supplant-OutputCached
X-Tb-Optimization-Total-Bytes-Saved
X-Ua-Device
X-Response-By
Fastly-SSL
X-Release
X-Zone
X-Provided-By
X-FL-QIT-DEBUG
X-FL-EDGE
HostName
Locid
Expect-Staple
X-Microcachable
X-Aicache-OS
Srvid
X-Via-CDN
X-Air-Pt
X-DC
X-Dc
X-Up
GeoIP-Latitude
X-From
Time
Memory
X-RCS-CacheZone
X-ND-Cache
Env
Edge-Copy-Time
X-Via-Edge
X-Via-SSL
X-Trace-ID
X-VC
X-Presslabs-Stats
X-NewRelic-App-Data
X-Servedbyhost
Svr
X-Vcl-Version
X-Cache-Enabled
NtCoent-Length
X-AIR-PT
Sid
X-Cached-By
SID
X-Edge-Pop
X-Generated-In
Cache
X-Webkit-CSP
X-Via-Popn
X-Via-Popv
X-Debug-Cache-Fetch
X-Via-Poph
X-DataCenter
X-Debug-Cache-Store
X-Nc
X-HS-Status
X-Lambda-Id
X-Vc
X-Wa
X-Cs
X-Esi
X-Srv
Fastly-Drupal-Html
AMP-Access-Control-Allow-Source-Origin
X-HA-Backend
X-ZONE
X-Correlation-ID
Cdn
X-Vgn-Hpd-Ssi
X-Client-Ip
X-Vgn-Hpd-Variations-Key
GeoIp-Country-Code
VNS-Age
CPC-Age
VNS-Cache
CPC-Cache
X-Vtex-Remote-Cache
X-Vgn-Hpd-Cached
X-CCDN-CacheTTL
X-Hcs-Proxy-Type
X-CCDN-Origin-Time
X-Render-Time
X-VCT
X-Check-Cacheable
X-NGINX-Cache
Hostname
X-AK-Request-ID
Server-ID
Cdncip
Cdnsip
X-LB-ID
X-Gateway-Skip-Cache
True-Client-IP
X-TH-Server
X-Amz-Meta-Cb-Modifiedtime
X-Gateway-Request-Id
X-Gateway-Cache-Status
X-Via-NSCOPI
X-Gateway-Cache-Key
X-Upstream-Ht
X-Via-JSL
X-Upstream-Ct
XkeyRZ
X-Proxy-CacheRZ
X-Cache-Type
X-Fpc
X-ATG-Version
X-API-Version
X-CSRF-TOKEN
X-B3-SpanId
X-Cache-ASPX
X-Nf-Request-Id
X-Contensis-Viewer-Groups
X-Varnish-Authentication
Uri
X-Varnish-Beresp-TTL
X-EC-Lua
X-CS
Eomportal-Instance
M-TraceId
Esi-Enabled
Srv
X-RateLimit-Remaining-Second
XServer
True-Client-Ip
Ngx-Var-Key
X-CF-Lambda-Version
X-FPC
X-MSEdge-Features
X-Datadome
X-CF-Lambda-Fn
X-RateLimit-Limit-Second
X-MSEdge-Flight
X-Micro-Cache
Resin-Trace
X-Udemy-Cache-App-Namespace
X-PAYTM-SRV-ID
CDN
OT-Force-Account-Verify
Path
YJS-ID
Request-ID
X-SIPLIST1
IsBot
X-Cache-NGX
X-Request-URI
X-APP-VERSION
X-Wikidot-Static-Cache
X-Fastly-Country-Code
N-Cache
X-MP-GENERATED-AT
X-Wikidot-Backend
X-CDN-Cache-Status
GeoIP-Country-Code
X-Info
X-Lb-Id
X-VCL-Version
X-CLOUD-TRACE-CONTEXT
X-TX-ID
X-CACHE-KEY
X-Forwarded-Path
RNT-Machine
X-Orig-Expires
RNT-Time
X-Bl-Debug
X-Shop-Environment
X-Tenant
X-Accel-Version
Server-Id
Lb
X-Service-Response-Time
Sm-Log-Id
X-Ha-Backend
X-MCACHE
X-Policy
X-WA
X-Datacenter
X-B3-Trace-ID
Location
X-App-Name
X-Pod-Name
X-Edge-POP
LB
X-RateLimit-Reset
Cross-Origin-Opener-Policy-Report-Only
X-Akamai-Pragma-Client-IP
X-Cache-Expires
X-Via-PopH
Servername
HIT
X-Cdn-Cache-Status
X-Oss-Object-Type
X-Oss-Hash-Crc64ecma
X-Oss-Request-Id
X-Oss-Server-Time
X-Oss-Storage-Class
X-Via-PopV
X-Via-PopN
X-NC
RATING
X-SERVER-NAME
X-Cdn-Request-ID
Ohc-File-Size
X-Geo
X-Srcache-Fetch-Status
Timeexpire
Hit
X-Snapshot-Date
X-Cache-Ttl
X-Srcache-Store-Status
X-ServedByHost
FSS-Cache
X-Cdn-Forward
Tcn
X-LiteSpeed-Cache-Control
Proxy-Connection
X-Cdn-Diag
Req-ID
Pramga
X-Ctl-Mach
X-Logging-Id
Yjs-Id
Geoip-Latitude
Epwk-X-Cache
ENV
X-HostName
X-Rebelmouse-Cache-Control
X-Rebelmouse-Surrogate-Control
X-Amz-Meta-Opti
WZWS-RAY
X-UP
X-TraceId
X-Serial
X-Scheme
X-TT-LOGID
X-Dw-Trace-Id
X-Moov-Xdn-Version
X-Moov-T
Traceparent
X-Hyper-Cache
X-Git-Commit
X-Container-Uri
X-MiniProfiler-Ids
X-M-Reqid
X-M-Log
X-Tncms
XM
X-PERF
X-RAMCache
X-Acquia-Application-Trace
X-Acquia-Application-UUID
X-Acquia-Purge-Tags
X-Acquia-Site
X-Qnm-Cache
X-ApacheServer
X-Swift-Error
X-Fastly-Backend-Reqs
Ec-Rule-Version
X-Viewer-Country
Cneonction
Warning
X-B3-Parentspanid
X-Lb-Nocache
X-Vcache
Content-Script-Type
Content-Style-Type
X-Wp-Cf-Super-Cache-Cache-Control
X-F-Status
X-Lsadc-Cache
X-Wp-Cf-Super-Cache
CountryCode
X-Mg-Cache
X-Litespeed-Cache-Control
MIME-Version
Ohc-Cache-HIT
X-Iauth-Set-Uid
X-Acquia-Purge-Cdn-Unconfigured
V-Age
X-LiteSpeed-Tag
X-VG-WebCache
X-Webstats-RespID
Ngx
Inserted-Into-Cache-At
X-Th-Server
X-Cache-Ngx
My-App
X-B3-ParentSpanId
X-Mid-Debug-Cache-Disk
X-Mid-Debug-Cache-Key
X-IPS-Cached-Response
X-Fastly-Cache-Hits
X-Request-URL