Threat Level: green Handler on Duty: Guy Bruneau

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
Expect-CT
X-XSS-Protection
CF-RAY
Pragma
X-Powered-By
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-UA-Compatible
P3P
X-Xss-Protection
X-Served-By
X-Download-Options
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Varnish
X-Adblock-Key
X-Request-ID
Access-Control-Allow-Credentials
X-Request-Id
CF-Ray
X-Permitted-Cross-Domain-Policies
X-AspNet-Version
Alt-Svc
Content-Security-Policy-Report-Only
X-Runtime
X-DNS-Prefetch-Control
X-Drupal-Cache
X-Check
X-Cache-Status
X-Generator
X-Cacheable
P3p
Timing-Allow-Origin
X-FRAME-OPTIONS
X-Iinfo
X-Envoy-Upstream-Service-Time
X-Content-Security-Policy
X-Drupal-Dynamic-Cache
Feature-Policy
Content-Encoding
Upgrade
Status
Access-Control-Expose-Headers
X-AspNetMvc-Version
X-CDN
Access-Control-Max-Age
X-Via
Server-Timing
X-UA-Device
X-Robots-Tag
Request-Context
X-Turbo-Charged-By
X-Amz-Request-Id
X-Cache-Group
EagleId
X-Amz-Id-2
X-Backend
Keep-Alive
X-AH-Environment
X-Proxy-Cache
X-Ws-Request-Id
X-Server
X-Age
X-Hacker
Host-Header
X-Ua-Compatible
Cf-Edge-Cache
X-Vhost
X-Server-Powered-By
X-Rq
Allow
X-Varnish-Cache
X-Dispatcher
X-Amz-Version-Id
Grace
X-LiteSpeed-Cache
X-Swift-CacheTime
X-Swift-SaveTime
Ali-Swift-Global-Savetime
X-OneAgent-JS-Injection
X-WebKit-CSP
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
Accept-CH
X-Device
Cf-Apo-Via
X-Page-Speed
Cf-Railgun
X-Server-Id
X-Aws-Lambda-Call-Status
X-Host
X-Node
X-Pingback
X-Cache-Spec
X-Nginx-Cache-Status
X-Akam-SW-Version
Surrogate-Control
X-Dns-Prefetch-Control
EagleEye-TraceId
X-Backend-Server
Request-Id
X-Readtime
X-Cache-Lookup
X-Ruxit-JS-Agent
X-HW
X-Cloud-Trace-Context
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-Content-Security-Policy-Report-Only
X-Application-Context
X-Trace
X-Response-Time
Accept-Ch-Lifetime
Permissions-Policy
X-CST
X-Nginx-Upstream-Cache-Status
X-Mod-Pagespeed
Fastly-Restarts
Accept-CH-Lifetime
X-Edge
X-WebKit-CSP-Report-Only
Content-Location
X-Country
X-Content-Type
X-Mcache
X-ECACHE
Rating
X-Clacks-Overhead
X-MS-InvokeApp
X-Url
X-Vname
X-TtlSet
X-PC
X-Amz-Server-Side-Encryption
X-Midtier
RTSS
X-VARITI-CCR
X-B3-TraceId
Cache-Tag
X-Vcap-Request-Id
X-Varnish-TTL
X-Element-Page-Cache
Verso
X-D2id
X-Ac
Origin-Trial
X-Exp-Variant
X-Exp-Id
X-Cdn-Fetch
X-GoogleNews-Bot
X-Kinja-Build
X-Kinja-Server
X-Kinja-Revision
X-Use-Magma
X-Kinja
X-Rack-Cache
X-Cnection
X-Server-Name
Service-Worker-Allowed
X-Powered-By-Plesk
X-Cache-TTL
Xkey
X-Navigation-Version
X-GitHub-Request-Id
X-Abt-Application-Version
X-ESI
X-NWS-LOG-UUID
X-SharePointHealthScore
X-Amz-Rid
SPRequestGuid
Edge-Control
X-Client-IP
X-Fastcgi-Cache
X-Cached
X-Ttl
X-Mg-S
X-Px
X-Erf-Bev-Bev-Is-Generated
X-Erf-Bev-Bev
X-Instrumentation
X-Kraken-Loop-Name
X-Server-Lifecycle-Phase
X-Browser-Type
Arr-Disable-Session-Affinity
X-Litespeed-Cache
SPIisLatency
SPRequestDuration
X-Upstream
X-Correlation-Id
X-Cache-Key
X-Middleton-Display
Pagespeed
Display
X-Sol
Content-MD5
X-Dw-Request-Base-Id
X-SRCache-Store-Status
X-SRCache-Fetch-Status
X-NF-Request-ID
Access-Control-Request-Method
Edge-Cache-Tag
X-Goog-Hash
X-XRDS-Location
X-Daa-Tunnel
Front-End-Https
X-Country-Code
Public-Key-Pins
X-Version
X-Powered-CMS
X-Id
AR-Request-ID
AR-PoweredBy
AR-CACHE
AR-SID
AR-ATIME
X-MSEdge-Ref
TCN
X-Recruiting
X-T
X-Forwarded-For
X-RateLimit-Remaining
X-Content-Digest
X-HP-Trace-Id
X-HP-Webp
X-Jurisdiction
X-Accel-Expires
Response
X-Middleton-Response
X-B3-TraceId-Primal
MRF-Tech
Mrf-Cache-Status
X-Shield-Request-Id
TP-L2-Cache
TP-Cache
X-Ser
Nginx-Cache
X-Amzn-Trace-Id
S
X-Fastly-Request-ID
X-Hits
X-Request-Processing-Time
X-Request-Received
X-HS-Combine-CSS
X-HS-Content-Id
X-HS-Hub-Id
X-HS-Cache-Config
Server-Node
Cache-Status
X-Distributor
X-Kinsta-Cache
X-Edge-Location-Klb
X-Ratelimit-Limit
MicrosoftSharePointTeamServices
Cache-Tags
X-Grace
Fastcgi-Cache
Alternate-Protocol
Server-Name
X-DataDome
X-Protected-By
X-TEC-API-ROOT
X-TEC-API-ORIGIN
X-TEC-API-VERSION
X-DIS-Request-ID
X-TTL
X-Ezoic-Cdn
X-Ratelimit-Remaining
X-Origin-Server
X-Ratelimit-Reset
X-Geo-Country
Accept-Ch
X-Ua-Browser
X-Ruxit-Js-Agent
X-LB-Cache
X-Microsite
X-Request-Handler-Origin-Region
X-Frontend
X-Rid
X-Debug-Info
X-Www-Served-By
X-Varnish-Backend
Cleartype
X-Logged-In
X-NGENIX-Cache
X-Forwarded-Proto
X-Git-Hash
Payment
Healthy
Cross-Origin-Opener-Policy
Filterid
X-FB-Debug
X-Page-Id
X-Load-Cache
Charset
X-B3-Sampled
Content-Disposition
X-Webkit-Csp
X-VCache
X-PressLabs-Stats
X-ASPNET-VERSION
X-LLID
DC
X-Origin-Cache
X-Cluster-Name
X-Oracle-Dms-Rid
X-Oracle-Dms-Ecid
X-Kong-Upstream-Latency
X-Kong-Proxy-Latency
MS-Author-Via
X-Hostname
X-GUploader-UploadID
X-Goog-Metageneration
X-Upgrade-Enabled
Retry-After
Accept-Charset
X-Proxy
X-F-Cache
Access-Control-Allow-Method
Cross-Origin-Resource-Policy
X-Activity-Id
X-Az
X-AppVersion
X-Type
X-Signature
X-Contextid
X-B-Cache
Viewport
X-Providence-Cookie
X-Flags
X-Varnish-Server
X-Request-Guid
Paypal-Debug-Id
X-Aspnet-Duration-Ms
X-Is-Crawler
X-Hosted-By
X-Amz-Replication-Status
X-Route-Name
X-Wix-Request-Id
X-Revision
X-Azure-Ref
X-Seen-By
X-TT
X-Amz-Meta-S3cmd-Attrs
X-B
X-Whom
Amp-Access-Control-Allow-Source-Origin
Realpath
X-FastCGI-Cache
Referer-Policy
X-Fb-Rlafr
Surrogate-Key
X-App-Environment
X-DynaTrace
X-Source
X-Aspnetmvc-Version
Count-Hit
X-Tt-Trace-Tag
X-Tt-Trace-Host
X-Akamai-Edgescape
X-RateLimit-Limit
X-Mobile
X-App-Server
X-Goog-Stored-Content-Length
X-Goog-Stored-Content-Encoding
X-Goog-Generation
X-Goog-Storage-Class
X-ORACLE-DMS-RID
X-ORACLE-DMS-ECID
Host
X-Cache-Control
X-EdgeConnect-Cache-Status
X-N
Version
X-HTML-Minification-Powered-By
X-Cache-Rule
X-Response-Served-From
X-Tumblr-User
X-Tumblr-Pixel-0
X-Tumblr-Pixel
X-Original-Request-Id
X-Tumblr-Pixel-1
X-Varnish-Age
X-UUID
X-Magnolia-Registration
X-Varnish-Grace
X-Oneagent-Js-Injection
Refresh
VIX-Pulpo-Node
VIX-Pulpo-Upstream-Status
X-Rule
X-Envoy-Decorator-Operation
SD-X-WS
Section-Io-Cache
Access-Control-Request-Headers
X-FW-Hash
X-FW-Dynamic
X-FW-Serve
X-FW-Server
X-FW-Version
X-FW-Type
X-Environment-Context
MS-CV
X-Adobe-Content
Ms-Operation-Id
X-Adobe-Loc
Akamai-GRN
X-Content-Powered-By
X-Cache-Grace
Protected
X-FW-Static
X-Page-View
X-RTag
X-Cache-Status-Check
X-Status
X-L-Path
X-Cache-Time
NGB
X-URL
X-NYM-Debug-Backend
X-Cache-Expired-At
X-Servername
X-ProcessESI
X-Instance
X-RemovedCookies
X-Http-Reason
X-Rendered-As
X-Is-Bot
X-G
X-Cacheable-TTL
GEO-INFO
X-Framework
X-Device-Type
X-Jobs
Url
X-User-Agent
X-Debug-IsPreview
X-Akamai-Request-ID2
X-Debug-IsConnected
X-Backend-Name
X-Language
X-Template
X-Nginx-Cache
X-CDN-Forward
X-B3-Traceid
SRV
X-Newrelic-App-Data
X-Yottaa-Optimizations
X-Drupal-Cache-Contexts
X-Yottaa-Metrics
X-Cache-Age
X-Drupal-Cache-Tags
CDN-RequestId
WPO-Cache-Status
WPO-Cache-Message
X-Cache-Hit
X-Tb
X-Trace-Id
From-Origin
Pinterest-Generated-By
X-Pinterest-Rid
Pinterest-Version
Country
X-Tt-Logid
X-Region
X-Node-Name
Front
Accept-Language
X-Real-IP
Fastly-Drupal-HTML
X-VC-Cache
X-Amzn-RequestId
X-Amz-Apigw-Id
Backend
X-Content-Options
Uber-Trace-Id
X-Mode
Content-Secure-Policy
X-DynaTrace-JS-Agent
Fastly-SWR
X-Cache-Operation
Fastly-SIE
Meta-Geo
X-COUNTRY
X-Time
X-Generation-Time
X-Rewrite-Enabled
X-RN-RSRV
X-UPSTREAM-Address
Filters
X-Tumblr-Pixel-2
X-Format
X-Cache-TTL-Remaining
Azure-InstanceId
X-Rocket-Nginx-Serving-Static
X-Zen-Fury
Azure-RegionName
X-Access
Azure-Version
CF-IPCountry
Azure-SlotName
X-Web-Node
Onion-Location
Azure-SiteName
X-Section
X-Unique-Id
X-SRV
X-Say-Cacheable
X-Sucuri-Cache
X-Sucuri-ID
X-Cms-Context
X-Sql-Count
X-Adobe-Source
X-Amzn-Remapped-Content-Length
X-Sql-Duration-Ms
X-Cache-Action
X-Ua
Webserver
X-Debug
X-Say-TTL
X-SayCDN-TTL
X-Proxy-Cache-Status
X-IPS-LoggedIn
X-Cache-Host
X-Proxy-Cache-Info
X-Cache-Server
Apigw-Requestid
Cache-Name
CDN-Uid
ServerID
Cross-Origin-Window-Policy
S-Rt
CDN-RequestCountryCode
CDN-PullZone
Web-Mar-Node
CDN-Cache
CDN-CachedAt
CDN-EdgeStorageId
X-TIME
X-Content-Age
X-GeoCountry
X-GeoCode
X-Forwarded-Host
X-Varnish-Beresp-Grace
X-Locale
X-Labrador-Cache-Channel
X-PHP-Host
X-Soup
X-Via-Fastly
X-Reqid
X-Skip-Cache
X-Edge-Location
X-LSADC-Cache
X-R9-Blue-Green-Version
X-LJ-Flow-ID
X-Zipkin-Id
X-Proto
X-LAGOON
X-Proxied
X-ProxyCache-Key
X-ProxyCache-Status
X-Xfnlog-Site
X-Extlb
X-Detected-As
X-Handled-By
X-Cluster
X-BYPASS-REASON
X-AWS-Id
X-SaId
X-IPLB-Request-ID
X-IPLB-Instance
X-Routing-Service
X-JoinUs
Property-Id
X-Urbn-Context-Path
X-Urbn-Site-Id
TWC-GeoIP-LatLong
Locale
X-Site-Version
X-UA-Device-Type
X-VWS-Id
Webcakes-Region
TWC-Privacy
Webcakes-App-Name
TWC-Locale-Group
TWC-GeoIP-Country
Webcakes-App-Version
X-Server-W
TWC-Device-Class
Node
X-PHP-Backend
X-Origin-Hint
TWC-Connection-Speed
X-CACHE-AGE
WP-Super-Cache
X-WP-CF-Super-Cache
Cache-Hits
Mime-Version
X-WP-CF-Super-Cache-Cache-Control
X-No-Session
X-Fastly-Request-Id
X-Ms-Request-Id
X-Timing-Wait
X-Ms-Version
Mn-Server-Ip
X-Proxy-Build
Selected-Fe
Fastcgi-Useragent
Liferay-Portal
X-Hl-Ver
X-Cluster-Node
X-Tec-Api-Origin
X-Tumblr-Pixel-3
X-Tec-Api-Version
Xserver
X-Times
X-Tec-Api-Root
ServedBy
X-Cache-Debug
DB-Nickname
X-Redis-Cache
X-Optimistic-Header
X-Air-Trace-Id
X-Air-Hostname
X-Request-Time
X-Air-Source
X-FB-TRIP-ID
X-XRDS-LOCATION
Source
X-Loop
X-TNCMS
X-GEO
Upgrade-Insecure-Requests
X-NWS-UUID-VERIFY
X-Generated-By
X-Mg-Request-UUID
X-Origin-Date
X-Buckets
X-Esi
X-Varnish-Hits
X-Akamai-Transformed
CF-Cached-On
X-Uri
X-Director
Countrycode
X-Pass-Why
X-Varnish-Beresp-Ttl
X-Tid
X-Cdn
X-Tx-Id
X-Storage
X-TA-CDN-Provider
Xet-Cookie
X-ARC
Frame-Options
X-Presslabs-Stats
X-DC
X-Origin-CC
X-FireWall-Port
X-Origin-TTL
X-Newrelic-Synthetics
X-Service
X-Varnish-Cache-Hits
X-ECache
X-App-Version
SID
X-Shopify-Stage
X-Trace-ID
X-Varnish-Hostname
X-Sorting-Hat-ShopId
X-Storefront-Renderer-Rendered
X-ShopId
X-Sorting-Hat-PodId
X-ShardId
X-Alternate-Cache-Key
X-Datadog-Sampling-Priority
X-Datadog-Sampled
X-Endurance-Cache-Level
Environment
X-Datadog-Trace-Id
X-Datadog-Parent-Id
X-B3-Spanid
Cache-Tv-Group
X-Request-Host
Req-Svc-Chain
Sslversion
Rendered-Blocks
Release
Redirect-Candidate
Gannett-Cam-Experience-Id
Edge-Cache
Surrogated-Key
Thinkindot-CacheControl
Thinkindot-CacheControl-Type
X-Vdms-Version
TDXMobile
T-Server
Origin
Odigeo-Trace-Id
X-We-Are-Hiring
Lang
Thinkindot-Control
BehaviorPad-Version
DCR-Decision-By
Candidate-Md5Url
A
MD5-Digest
DCR-Processing-Time-Ms
Ngx.Var.Host
X-VG-TLSProxy
Xc-Version
Meta-Geo-Continent
Host-ID
X-A-Ccd
X-Frame-Option
X-Gdpr
X-S-Maxage
X-S-Cookie
X-External-Request-Id
X-Epic-Correlation-Id
X-Destination
X-Developer
X-Ec-Fail
X-INCAP-ABP
X-Loc
X-Origin-Time
X-Platform-Cluster
X-Platform-Processor
X-Processor
X-Rojux
X-Nyt-Route
X-Mid
X-S
X-Mobile-URL
X-D
X-Core-Value
X-A-Dgt
X-A-Wwc
X-Aed
X-Application
X-A-Dcw
X-Vdms-Path
X-A
X-Platform-Router
X-A-Dam
X-B-Cookie
X-BBC-Edge-Cache-Status
X-CMSURLCustom
X-Thinkindot-L3
X-SRCache-Key
X-ScT
X-Cache-NE
X-Cache-Info
X-Bc-Bl
X-BCube-Filmed-By
X-TIM-N
WWW-Authenticate
X-Ec-GeoHdr
X-ServerID
X-Is-Gdpr
X-JWT-State
X-Human
Magicmarker
X-HS-Content-Campaign-Id
X-Gamma-Serve
X-Geo-Header
X-GeoIP-City
X-Has-Esi
X-NodeID
X-Origin-Response-Time
Fastly-GeoIP-CountryCode
Fastly-Backend-Name
X-Sn-Servicetimems
X-SVT-ORM-RULES
X-SD-PageType
X-SB
X-Fmm-Version
X-Req
X-Restarts
X-Old-Content-Length
Server-Host
Tube-Got-Results
Tube-Got-Eval
Tube-Get-Contents
X-Cache-Bucket
Tube-Return
Server-Info
X-Akamai-Device-Characteristics
X-Auto-Login
Vix-Hermes-Req-Id
X-Cdn-Origin
X-Cdn-Srv
X-DefHash
X-Developers
X-Ec-Custom-Error
X-SVT-ORM-VERSION
State
X-DefElseHash
X-Clara-WADP
X-Core-Mission
X-CUA
X-Pubstack
X-Platform-Server
X-WA-Info
DSUID
C-Via
X-VServer
X-Varnish-Remaining-TTL
Click-Count-Error
Click-Count-Action-Start
X-Varnish-CookieINHashed-On
Apple-News-Services-Request-Url
Apple-News-Services-Parsed-Url
X-Generated-On
X-Level-Front-Cache
X-Served-From
X-WP-CF-Super-Cache-Active
X-Worker
Apple-News-Services-Host
Apple-News-Services-Handled
Cluster
X-WADP-Cache
Decoy-Debug-Status
Decoy-Debug-Key
Decoy-Debug-TTL
Country-Code
X-Varnish-CookieHashed-On
X-AIR-PT
Section-Origin-Responded
X-RM-Cache-TTL
Section-Io-Id
Section-Io-Origin-Time-Seconds
Section-Io-Origin-Status
X-Cache-Id
X-Cache-FS-Status
Svr
Memcached
X-Date
AKAMAI
CloudFront-Viewer-Country
X-Bip
X-Accel-Buffering
X-Thanos
X-Varnish-Beresp-Status
X-App
X-Conf
X-Accel-Expires-Debug
X-Block-Status
X-Ad-Defer-Variation
X-Pool
X-Test
X-Cache-Backend
X-Slack-Backend
X-Sigma
X-Request-Start
X-Variation
X-Httpd
X-Hnp-Log
X-Gzip
X-LB-NoCache
X-Location
X-Planisys-CDN-Rules
X-Planisys-CDN-Cache
X-Node-Id
X-Nananana
X-Minions-Version
X-GeoIP-Region-Code
X-GeoIP-Country-Code
X-Up
X-Scale
X-Origin
X-DPWN-IS-SECURE
X-Dispatcher-Number
X-Esi-Check
X-Fastly-Backend
X-Rocket-Build-Number
X-Wix-Viewer-Type
X-Gen-Mode
X-Var-Ttl
X-Sigma-Backend
X-Planisys-CDN-TTL
Platform
Pics-Label
Origin-CC
Producers
Server-Ext
Sever-Int
Server-Hostname
L
Is-Eu
Cmstype
Cmsid
CDCHOST
Cache-Provider
Cache-Host
Gh-Request-Id
Adler-Geo
User-Cache-Control
Origin-EX
Web-Mar-Region
X-Parent-Response-Time
Fastly-SSL
We-Hiring
X-Vmg-Version
Cache-Key
X-NCache
X-Hash
X-Platform
X-Slack-Shared-Secret-Outcome
X-Nginx-Cache-Key
X-Qloud-Router
X-Owner
Machine
X-Region-Sid
X-Op-Id-All
X-Forwarded-Site
X-GeoIP
X-Refresh
X-Server-IP
Kp-EeAlive
Ssr
NGX
X-Cached-By
Mail-Subject
Cdn
X-Azure-Ref-OriginShield
On-Server
CacheControlHeader
X-Fetched-On
NM-Fastcgi-Cache
X-Men
X-Dispatcher-Server
Wxu-Next-Region
X-Via-Popn
Wxu-Next-Hostname
Wxu-Next-Commit
X-Mvc-Supplant-Cachable
X-HN
X-Device-Os
PFcat
X-Ckpd-Fst-Backend
X-Irp-Debug
X-FC-Vary-Parameters
Datacenter
X-Org
X-Varnish-Ttl
X-Varnishpool
X-CSRF-Token
X-CacheTTL
X-V-Cache
X-Via-Poph
X-Via-Popv
X-VarnishDD-TTL
X-Cache-Tags
X-Webkit-CSP-Report-Only
Env
X-Csrf-Jwt
L5d-Success-Class
X-CGP
X-Cache-Date
X-Aicache-OS
X-HA-Backend
X-Eu-Site
HA-Ipaddr
Ha-Gx-Prefs
X-Servedbyhost
GeoIP-Latitude
Canary
X-Client-Ip
HostName
X-Cache-Remote
X-Mvc-Supplant-OutputCached
X-Microcachable
Cdncip
Server-ID
Cdnsip
X-Tb-Optimization-Total-Bytes-Saved
X-AK-Request-ID
X-RCS-CacheZone
X-VC
X-Mly-Id
X-API-Version
X-APP-VERSION
X-ZONE
X-Wa
X-LB-ID
X-Gateway-Request-Id
X-Gateway-Cache-Status
X-Gateway-Cache-Key
X-DataCenter
X-Gateway-Skip-Cache
X-Fpc
Load-Balancing
X-Zone
Time
X-Fastly-Cache
X-Nc
Memory
Cache
X-Webkit-CSP
Request-ID
X-Origin-Expires
X-Instance-Name
X-Check-Cacheable
Eomportal-Instance
X-Via-NSCOPI
X-Generated-In
X-ND-Cache
X-Vgn-Hpd-Cached
X-Vgn-Hpd-Ssi
X-Vgn-Hpd-Variations-Key
X-Vc
Ngx-Var-Key
X-Response-By
X-Micro-Cache
OT-Force-Account-Verify
X-Correlation-ID
X-CS
Expect-Staple
X-Release
X-HS-Status
Srvid
X-FL-QIT-DEBUG
Locid
X-NewRelic-App-Data
X-FL-EDGE
Hostname
IsBot
X-CCDN-Origin-Time
X-From
X-Cache-Enabled
X-Api-Version
X-Hcs-Proxy-Type
X-Request-URI
X-CCDN-CacheTTL
X-SIPLIST1
X-Via-CDN
NtCoent-Length
AMP-Access-Control-Allow-Source-Origin
X-VCL-Version
X-CSRF-TOKEN
X-Edge-Pop
X-Via-Edge
X-Via-SSL
Edge-Copy-Time
X-Cache-NGX
X-Info
X-Via-JSL
X-Provided-By
Srv
X-NGINX-Cache
GeoIp-Country-Code
X-MCACHE
Uri
XkeyRZ
X-Proxy-CacheRZ
X-Srv
X-Debug-Cache-Fetch
True-Client-Ip
X-Debug-Cache-Store
X-Amz-Meta-Cb-Modifiedtime
X-Air-Pt
X-Nf-Request-Id
X-Lambda-Id
X-Vcl-Version
True-Client-IP
Location
X-Dc
X-EC-Lua
X-B3-SpanId
VNS-Cache
Path
Servername
Sid
X-Vtex-Remote-Cache
CPC-Cache
VNS-Age
X-Edge-POP
CPC-Age
X-Cache-Expires
X-Oss-Storage-Class
X-Oss-Request-Id
X-Oss-Object-Type
X-Oss-Hash-Crc64ecma
X-Render-Time
Resin-Trace
GeoIP-Country-Code
X-Oss-Server-Time
X-SERVER-NAME
X-Server-ID
X-Cs
Cross-Origin-Opener-Policy-Report-Only
X-Fastly-Country-Code
LB
X-CLOUD-TRACE-CONTEXT
Fastly-Drupal-Html
X-TH-Server
X-Moov-T
X-Moov-Xdn-Version
Traceparent
X-ATG-Version
CDN
X-VCT
X-Contensis-Viewer-Groups
X-Cache-ASPX
X-Varnish-Authentication
X-MSEdge-Features
X-Scheme
X-Viewer-Country
X-Cdn-Request-ID
X-MSEdge-Flight
X-Accel-Version
X-TX-ID
X-Pod-Name
Esi-Enabled
M-TraceId
X-PERF
X-ApacheServer
Timeexpire
YJS-ID
X-Upstream-Ht
X-Upstream-Ct
X-Akamai-Pragma-Client-IP
X-Varnish-Beresp-TTL
X-NAPM-TraceId
X-RateLimit-Reset
X-FPC
X-CF-Lambda-Version
FSS-Cache
Rip
X-Datacenter
CountryCode
X-CF-Lambda-Fn
X-Datadome
X-RateLimit-Remaining-Second
Powered-By
X-Cache-Type
X-RateLimit-Limit-Second
X-PAYTM-SRV-ID
X-Udemy-Cache-App-Namespace
Sm-Log-Id
HIT
X-Service-Response-Time
X-Cdn-Cache-Status
X-WA
X-Lb-Id
X-Geo
XServer
V-Age
True-Client-Country-4JS
X-NC
Proxy-Connection
X-Wikidot-Backend
RNT-Machine
X-CACHE-KEY
RNT-Time
X-Srcache-Store-Status
X-Srcache-Fetch-Status
X-Clientip
X-Wikidot-Static-Cache
Tracecode
Ohc-File-Size
Server-Id
X-FORWARDED-FOR
X-Shop-Environment
XM
X-LiteSpeed-Cache-Control
X-Orig-Expires
X-CDN-Cache-Status
X-Hyper-Cache
ENV
N-Cache
X-Tenant
X-TraceId
X-VG-WebCache
X-Bl-Debug
X-ServedByHost
X-Forwarded-Path
Yjs-Id
Epwk-X-Cache
X-B3-Parentspanid
X-Ha-Backend
WZWS-RAY
X-B3-Trace-ID
Geoip-Latitude
X-MP-GENERATED-AT
X-Cdn-Forward
Ngx
X-M-Reqid
X-M-Log
User-Agent
Inserted-Into-Cache-At
Content-Style-Type
Content-Script-Type
X-Vgn-Hpd-Reason
X-Rebelmouse-Surrogate-Control
X-B3-ParentSpanId
X-Via-PopH
X-App-Name
X-Policy
X-Amz-Meta-Opti
X-Cdn-Diag
X-MiniProfiler-Ids
X-Qnm-Cache
X-Rebelmouse-Cache-Control
Ec-Rule-Version
X-Fastly-Backend-Reqs
X-Serial
X-Swift-Error
X-Via-PopV
X-Dw-Trace-Id
X-Lb-Nocache
X-Via-PopN
X-F-Status
X-Lsadc-Cache
X-TT-LOGID
X-Wp-Cf-Super-Cache-Cache-Control
X-Wp-Cf-Super-Cache
Req-ID
X-Connection-Hash
X-Ramcache
MIME-Version
Cneonction
X-LiteSpeed-Tag
Warning
Pramga
X-UP
X-Mid-Debug-Cache-Disk
X-Mid-Debug-Cache-Key
X-Request-URL
My-App
X-Snapshot-Date
Expiry
X-Th-Server
X-Stale
X-Cache-Ngx
X-IPS-Cached-Response