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