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