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