Threat Level: green Handler on Duty: Xavier Mertens

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
Strict-Transport-Security
Content-Length
X-Content-Type-Options
Link
Last-Modified
Cf-Request-Id
CF-Cache-Status
ETag
Expect-CT
Accept-Ranges
X-Powered-By
Pragma
X-XSS-Protection
CF-RAY
X-Cache
Via
Age
Content-Security-Policy
Report-To
NEL
Referrer-Policy
Access-Control-Allow-Origin
Content-Language
X-Amz-Cf-Pop
X-Amz-Cf-Id
Alt-Svc
X-Cache-Hits
X-UA-Compatible
P3P
X-Xss-Protection
X-Served-By
CF-Ray
X-Download-Options
X-Request-Id
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Varnish
X-Adblock-Key
Access-Control-Allow-Credentials
X-Permitted-Cross-Domain-Policies
Content-Security-Policy-Report-Only
X-AspNet-Version
X-Runtime
X-Drupal-Cache
X-Cache-Status
X-Generator
X-Check
X-Cacheable
X-FRAME-OPTIONS
X-Envoy-Upstream-Service-Time
Timing-Allow-Origin
X-DNS-Prefetch-Control
X-Iinfo
X-Dns-Prefetch-Control
X-Drupal-Dynamic-Cache
Feature-Policy
Server-Timing
X-Content-Security-Policy
Access-Control-Expose-Headers
X-XSS-PROTECTION
Content-Encoding
Status
X-CDN
Upgrade
X-Request-ID
X-AspNetMvc-Version
P3p
Access-Control-Max-Age
X-Amz-Request-Id
X-Amz-Id-2
X-Via
Request-Context
X-Turbo-Charged-By
X-Backend
X-Cache-Group
X-AH-Environment
X-Robots-Tag
Cf-Edge-Cache
Keep-Alive
Host-Header
X-Hacker
X-Proxy-Cache
X-UA-Device
X-Vhost
X-Server
X-Rq
X-Server-Powered-By
Allow
X-Ws-Request-Id
X-Age
X-Varnish-Cache
X-Dispatcher
EagleId
X-Amz-Version-Id
Nel
X-LiteSpeed-Cache
Grace
Cf-Apo-Via
Cf-Railgun
X-Page-Speed
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Device
EagleEye-TraceId
X-Aws-Lambda-Call-Status
X-Swift-CacheTime
X-Swift-SaveTime
X-OneAgent-JS-Injection
Ali-Swift-Global-Savetime
X-Pingback
X-Host
X-WebKit-CSP
X-Node
X-Cache-Lookup
X-CST
X-Server-Id
Accept-CH
X-Backend-Server
Surrogate-Control
X-Readtime
Permissions-Policy
X-Nginx-Cache-Status
X-Nginx-Upstream-Cache-Status
X-Akam-SW-Version
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
Request-Id
X-Application-Context
X-Content-Security-Policy-Report-Only
X-Cloud-Trace-Context
X-Ua-Compatible
Accept-CH-Lifetime
X-Response-Time
X-HW
X-Trace
X-Ruxit-JS-Agent
Xkey
X-Edge
Content-Location
X-Clacks-Overhead
X-Mod-Pagespeed
Accept-Ch-Lifetime
Rating
Accept-Ch
X-ESI
X-Midtier
X-Url
X-Amz-Server-Side-Encryption
X-Mcache
Cache-Tag
X-ECACHE
X-Country
X-MS-InvokeApp
X-Upstream
X-Rack-Cache
X-Vcap-Request-Id
X-D2id
X-Powered-By-Plesk
Verso
X-Kinja-Build
X-Use-Magma
X-Kinja-Revision
X-GoogleNews-Bot
X-Kinja
X-Exp-Variant
X-Cdn-Fetch
X-Exp-Id
X-Kinja-Server
X-Element-Page-Cache
Edge-Control
X-Oneagent-Js-Injection
X-WebKit-CSP-Report-Only
X-TtlSet
X-PC
X-Vname
RTSS
Service-Worker-Allowed
X-Ac
X-Country-Code
Origin-Trial
X-VARITI-CCR
X-Navigation-Version
Fastly-Restarts
X-Goog-Hash
X-GitHub-Request-Id
X-Abt-Application-Version
X-Cache-TTL
X-Litespeed-Cache
X-Browser-Type
X-Aspnetmvc-Version
X-Cached
X-Amz-Rid
X-Webkit-CSP
X-Kinja-CCPA
X-Varnish-TTL
X-Ruxit-Js-Agent
Cross-Origin-Opener-Policy
X-Middleton-Display
Pagespeed
X-Sol
Display
X-Server-Name
X-NWS-LOG-UUID
X-Dw-Request-Base-Id
X-Amzn-Trace-Id
X-SharePointHealthScore
SPRequestGuid
X-ORACLE-DMS-ECID
X-ORACLE-DMS-RID
X-Ttl
X-Powered-CMS
X-B3-Traceid
SPRequestDuration
SPIisLatency
X-Erf-Bev-Bev
X-Instrumentation
X-Server-Lifecycle-Phase
X-Content-Type
X-Erf-Bev-Bev-Is-Generated
X-Kraken-Loop-Name
AR-Request-ID
AR-SID
X-Times
AR-PoweredBy
AR-ATIME
X-Mg-S
X-Cache-Key
X-FastCGI-Cache
X-Client-IP
Pinterest-Generated-By
Pinterest-Version
X-Pinterest-Rid
Arr-Disable-Session-Affinity
Response
X-Middleton-Response
X-Fastly-Request-ID
X-Version
X-Jurisdiction
X-HP-Webp
X-HP-Trace-Id
X-Cnection
AR-CACHE
Nginx-Cache
X-Ser
X-Accel-Expires
Cache-Tags
X-T
X-SRCache-Store-Status
X-SRCache-Fetch-Status
Cache-Status
X-RateLimit-Remaining
Edge-Cache-Tag
X-NF-Request-ID
Front-End-Https
X-MSEdge-Ref
X-Hits
X-Px
X-B3-TraceId
Public-Key-Pins
X-Recruiting
X-RateLimit-Limit
Payment
X-LLID
X-Frontend
X-Request-Received
X-Request-Processing-Time
MRF-Tech
Mrf-Cache-Status
X-B3-TraceId-Primal
X-Ua-Browser
S
Server-Node
X-Shield-Request-Id
X-PressLabs-Stats
Content-MD5
X-Goog-Metageneration
X-GUploader-UploadID
X-DIS-Request-ID
X-Daa-Tunnel
MicrosoftSharePointTeamServices
X-Amz-Apigw-Id
Access-Control-Request-Method
X-Amzn-RequestId
TP-Cache
X-Content-Digest
X-TTL
X-Protected-By
X-HS-Cache-Config
X-HS-Combine-CSS
X-Request-Handler-Origin-Region
X-HS-Content-Id
Realpath
X-Distributor
X-HS-Hub-Id
X-Microsite
Fastcgi-Cache
Access-Control-Allow-Method
X-FB-Debug
X-LB-Cache
X-Page-Id
X-Forwarded-For
X-Cluster-Name
X-Rid
Accept-Charset
X-Erf-Stays-Pdp-Viaduct-Migration-Web
X-Geo-Country
X-Server-ID
TP-L2-Cache
X-Aspnet-Version
X-Ua-Device
X-Hostname
X-B3-Sampled
X-Ezoic-Cdn
X-Goog-Storage-Class
X-Goog-Generation
X-Goog-Stored-Content-Encoding
X-Goog-Stored-Content-Length
X-Seen-By
Count-Hit
X-Ratelimit-Remaining
Cross-Origin-Resource-Policy
Cleartype
X-Correlation-Id
TCN
X-App-Server
X-Fastcgi-Cache
X-Webkit-CSP-Report-Only
Referer-Policy
X-Mobile
X-Kinsta-Cache
X-Edge-Location-Klb
X-Varnish-Backend
X-Content-Options
X-Logged-In
DC
X-Newrelic-App-Data
X-Origin-Cache
X-Hosted-By
X-Git-Hash
X-Id
X-Contextid
X-Is-Crawler
X-Aspnet-Duration-Ms
X-Amz-Replication-Status
X-Route-Name
X-Xrds-Location
X-Fb-Rlafr
X-Providence-Cookie
X-Flags
X-Request-Guid
X-Debug-Info
Surrogate-Key
X-Grace
X-Revision
X-IPS-LoggedIn
X-TT
X-Ratelimit-Limit
X-App-Environment
Frame-Options
Retry-After
X-Varnish-Grace
X-Envoy-Decorator-Operation
X-Amz-Meta-S3cmd-Attrs
X-TEC-API-ROOT
X-TEC-API-VERSION
X-TEC-API-ORIGIN
X-Forwarded-Proto
X-F-Cache
X-Azure-Ref
X-RateLimit-Reset
Section-Io-Cache
X-Wix-Request-Id
X-Magnolia-Registration
Healthy
X-Whom
X-Origin-Server
Charset
Alternate-Protocol
X-COUNTRY
MS-Author-Via
X-Proxy-Cache-Info
WPO-Cache-Status
WPO-Cache-Message
Viewport
X-Akamai-Edgescape
X-App-Version
X-ECache
X-Backend-Name
X-Www-Served-By
X-Language
X-Az
X-B
Paypal-Debug-Id
X-AppVersion
X-Activity-Id
SRV
Amp-Access-Control-Allow-Source-Origin
X-Varnish-Server
Filterid
X-Original-Request-Id
X-Cache-Rule
SD-X-WS
X-DataDome
VIX-Pulpo-Upstream-Status
X-Response-Served-From
VIX-Pulpo-Node
X-User-Agent
Server-Name
X-Cache-Grace
Akamai-GRN
Country
Front
X-Edge-Location
X-Http-Reason
X-Datadog-Parent-Id
X-Rule
X-Datadog-Trace-Id
Host
X-Instance
X-UUID
X-Datadog-Sampling-Priority
X-Nf-Request-Id
X-Region
Protected
From-Origin
X-Status
X-Jobs
X-Unique-Id
X-Page-View
X-Environment-Context
X-L-Path
X-Cacheable-TTL
X-ARC
X-Akamai-Request-ID2
X-N
X-Varnish-Age
X-EdgeConnect-Cache-Status
ServerID
X-FW-Static
Fastly-SIE
X-Kong-Upstream-Latency
X-FW-Version
X-Tumblr-Pixel-0
X-Tumblr-Pixel
Fastly-SWR
X-Kong-Proxy-Latency
X-FW-Server
X-Adobe-Content
X-Adobe-Loc
X-Framework
X-FW-Dynamic
X-FW-Hash
X-Rendered-As
X-FW-Serve
X-Tumblr-Pixel-1
X-FW-Type
X-Load-Cache
X-Tumblr-User
X-Is-Bot
X-Type
X-ProcessESI
X-Yottaa-Metrics
X-Yottaa-Optimizations
X-G
X-Vcache
X-RemovedCookies
X-Rocket-Nginx-Serving-Static
X-Cache-Time
X-Trace-Id
Access-Control-Request-Headers
X-Mg-Request-UUID
X-Proxy
Content-Disposition
X-Datadog-Sampled
X-Amzn-Remapped-Content-Length
X-B-Cache
X-Signature
X-Debug-IsPreview
X-Debug-IsConnected
X-CDN-Forward
X-Cache-Control
X-Time
X-Tec-Api-Root
X-Tec-Api-Origin
X-Tec-Api-Version
X-Cache-Age
X-Client-Ip
Backend
X-Erf-Web-Scheduler
Refresh
X-Drupal-Cache-Tags
X-DynaTrace
Countrycode
X-WP-CF-Super-Cache-Cache-Control
X-WP-CF-Super-Cache
Xet-Cookie
Accept-Language
X-Httpd
X-XRDS-Location
X-Nginx-Cache
X-Servername
X-Generated-By
CF-IPCountry
Url
X-Source
Webserver
X-Tt-Trace-Host
X-HTML-Minification-Powered-By
X-DynaTrace-JS-Agent
X-Tt-Trace-Tag
X-Mode
X-NYM-Debug-Backend
X-Template
X-Device-Type
X-Storage
X-Content-Powered-By
Version
GEO-INFO
X-Content-Age
Onion-Location
X-Say-TTL
X-JoinUs
Meta-Geo
S-Rt
X-UPSTREAM-Address
X-SayCDN-TTL
X-GeoCode
X-Generation-Time
X-URL
X-GeoCountry
X-LAGOON
X-Rn-Rsrv
Filters
X-Rewrite-Enabled
X-Cache-Operation
X-XRDS-LOCATION
X-SaId
Load-Balancing
X-Cache-Action
X-Say-Cacheable
X-Director
OT-Force-Account-Verify
Locale
X-Git-Commit
X-MCACHE
X-ServerID
X-Forwarded-Host
X-Urbn-Context-Path
X-Container-Uri
X-Cluster-Node
X-Soup
X-Urbn-Site-Id
Xserver
X-VC-Cache
X-RM-Cache-TTL
Azure-RegionName
Azure-SiteName
Azure-InstanceId
X-Proto
X-Ms-Version
X-Ms-Request-Id
X-PHP-Host
X-Lambda-Id
X-VCT
Azure-SlotName
Web-Mar-Node
X-Sql-Duration-Ms
X-Tncms
X-Sql-Count
X-Loop
X-Labrador-Cache-Channel
X-Tb
X-Varnish-Cache-Hits
X-Served-From
X-Detected-As
X-Varnish-Hostname
X-Cache-Server
Azure-Version
X-Adobe-Source
X-CCDN-CacheTTL
X-Tt-Logid
X-Hcs-Proxy-Type
X-CCDN-Origin-Time
X-Zipkin-Id
X-Extlb
X-Tumblr-Pixel-2
DB-Nickname
X-Tumblr-Pixel-3
X-Proxied
Node
Mn-Server-Ip
X-RCS-CacheZone
X-R9-Blue-Green-Version
X-Logging-Id
X-Format
X-Cache-Hit
X-Routing-Service
X-FB-TRIP-ID
X-Skip-Cache
TWC-GeoIP-Country
TWC-Device-Class
Webcakes-Region
TWC-Connection-Speed
TWC-Locale-Group
Webcakes-App-Version
Selected-Fe
Webcakes-App-Name
TWC-Privacy
Uber-Trace-Id
X-Origin-Hint
TWC-GeoIP-LatLong
Fastcgi-Useragent
X-Fetched-On
X-Ua
Cross-Origin-Window-Policy
X-Timing-Wait
X-Uri
X-Proxy-Build
X-Debug
Property-Id
X-Zen-Fury
X-Webkit-Csp
X-LSADC-Cache
X-Endurance-Cache-Level
X-Redis-Cache
Source
X-Srv
X-Sucuri-ID
X-Sucuri-Cache
CDN-RequestId
X-Drupal-Cache-Contexts
X-Varnish-Ttl
Section-Origin-Responded
Section-Io-Origin-Time-Seconds
X-Upgrade-Enabled
Section-Io-Origin-Status
Section-Io-Id
X-TimeS
X-NGENIX-Cache
X-Newrelic-Synthetics
X-S
X-B3-SpanId
X-Origin-Date
X-MP-GENERATED-AT
X-Varnish-Hits
X-Pass-Why
X-Cache-Expired-At
X-Origin-CC
X-Origin-TTL
Liferay-Portal
Upgrade-Insecure-Requests
X-Akamai-Transformed
X-Real-IP
X-CACHE-AGE
NGB
X-Ratelimit-Reset
X-FTR-Request-ID
Fastly-Drupal-HTML
X-Handled-By
X-UA-Device-Type
X-Oracle-Dms-Ecid
X-Cache-TTL-Remaining
X-Oracle-Dms-Rid
X-TIME
X-Cache-Type
X-Cms-Context
X-ID
X-Xfnlog-Site
X-Optimistic-Header
X-Reqid
X-Hl-Ver
X-GEO
X-Node-Name
Apigw-Requestid
CDN-CachedAt
CDN-Cache
CDN-EdgeStorageId
X-Restarts
CDN-RequestPullCode
ServedBy
CDN-Uid
CDN-RequestPullSuccess
CDN-RequestCountryCode
CDN-PullZone
X-Pubstack
X-Via-JSL
X-Tx-Id
X-No-Session
Ms-Operation-Id
X-BYPASS-REASON
X-Cache-Host
MS-CV
X-ProxyCache-Key
X-RTag
X-ProxyCache-Status
WP-Super-Cache
X-Server-W
X-Parent-Response-Time
X-Debug-Cache-Fetch
Xc-Version
X-VWS-Id
X-D
X-CF-Lambda-Version
X-Cache-NE
BehaviorPad-Version
X-CacheTTL
X-CF-Lambda-Fn
X-Conf
X-CGP
X-Csrf-Jwt
X-LJ-Flow-ID
X-Dispatcher-Number
X-Developer
X-Destination
X-Ec-Custom-Error
X-Ec-Fail
X-Epic-Correlation-Id
X-Ec-GeoHdr
X-Shop-Environment
X-AWS-Id
X-Bl-Debug
X-Debug-Cache-Store
X-IPLB-Request-ID
X-IPLB-Instance
X-We-Are-Hiring
X-Cluster
X-Worker
X-Bc-Bl
True-Client-Country-4JS
Magicmarker
MD5-Digest
Vix-Hermes-Req-Id
Lang
HA-Ipaddr
L
L5d-Success-Class
Meta-Geo-Continent
N-Cache
Origin-Agent-Cluster
Rendered-Blocks
Redirect-Candidate
Sslversion
Odigeo-Trace-Id
T-Server
Ngx.Var.Host
Surrogated-Key
Ha-Gx-Prefs
W
X-App
X-Aed
DCR-Decision-By
X-App-Name
X-Application
Canary
Candidate-Md5Url
X-B-Cookie
DCR-Processing-Time-Ms
X-A-Wwc
Web-Mar-Region
Fastly-SSL
Gannett-Cam-Experience-Id
X-A
X-A-Ccd
X-A-Dgt
X-A-Dcw
X-A-Dam
X-BCube-Filmed-By
X-Vtex-Remote-Cache
X-B3-Spanid
X-Vdms-Version
X-S-Cookie
X-SRCache-Key
X-SD-PageType
X-ScT
X-Rojux
X-Nyt-Route
X-Orig-Expires
X-Origin-Time
X-Eu-Site
X-Tenant
X-Request-Host
X-Vdms-Path
Content-Secure-Policy
X-Viewer-Country
X-Slack-Backend
X-Gdpr
X-Fastly-Backend
X-Forwarded-Path
X-Slack-Shared-Secret-Outcome
X-External-Request-Id
X-FC-Vary-Parameters
X-CSRF-Token
X-RateLimit-Remaining-Second
X-Thinkindot-L3
X-Refresh
X-Test
X-ShopId
X-Thanos
X-Pool
X-Up
X-Alternate-Cache-Key
X-Policy
X-Accel-Expires-Debug
Host-ID
X-Qloud-Router
Release
X-RateLimit-Limit-Second
X-SVT-ORM-VERSION
Thinkindot-CacheControl-Type
X-Sorting-Hat-ShopId
Thinkindot-Control
X-Storefront-Renderer-Rendered
X-S-Maxage
Thinkindot-CacheControl
X-Sn-Servicetimems
X-Sorting-Hat-PodId
TDXMobile
Server-Host
X-PAYTM-SRV-ID
VNS-Cache
X-Server-IP
X-ShardId
X-Request-Time
Req-Svc-Chain
X-SVT-ORM-RULES
X-Shopify-Stage
VNS-Age
We-Hiring
X-Bip
X-Wikidot-Static-Cache
X-Loc
X-Level-Front-Cache
X-Irp-Debug
X-Mid
X-Mly-Id
X-Nitro-Cache
X-Nananana
X-Wix-Viewer-Type
X-Mvc-Supplant-Cachable
X-Human
X-Wikidot-Backend
X-Generated-On
X-Vmg-Version
X-DPWN-IS-SECURE
X-VServer
X-DefHash
X-Geo-Header
X-Hash
X-GeoIP-Region-Code
X-GeoIP-Country-Code
X-DefElseHash
X-VG-WebCache
X-VG-TLSProxy
X-Cache-Debug
X-Varnish-CookieINHashed-On
X-Cache-Info
X-Varnish-Remaining-TTL
X-Cache-Bucket
Producers
X-BBC-Edge-Cache-Status
X-Var-Ttl
X-Variation
X-Varnish-CookieHashed-On
X-Varnishpool
X-Cdn-Diag
X-NodeID
X-Core-Value
X-Node-Id
X-Date
X-Core-Mission
X-CMSURLCustom
X-Cdn-Origin
X-Org
X-Old-Content-Length
X-Clientip
X-Owner
X-Accel-Buffering
Cache-Provider
Mail-Subject
Adler-Geo
Fastly-Backend-Name
X-Correlation-ID
AKAMAI
X-AB
Gh-Request-Id
Is-Eu
Platform
Fastly-GeoIP-CountryCode
Cf-Device-Type
Expect-Staple
CPC-Cache
Cmsid
CPC-Age
Cmstype
Datacenter
Origin
X-Micro-Cache
X-Proxy-Cache-Status
X-Cache-Status-Check
User-Cache-Control
X-Vcl-Version
X-Cache-Id
CDCHOST
X-Block-Status
X-Auto-Login
X-Origin-Response-Time
X-PERF
CloudFront-Viewer-Country
Apple-News-Services-Host
X-Gen-Mode
X-GeoIP
X-Gzip
X-From
X-Device-Os
X-Fmm-Version
X-Forwarded-Site
X-Hnp-Log
X-INCAP-ABP
Apple-News-Services-Handled
X-Esi-Check
Apple-News-Services-Parsed-Url
X-Cdn-Srv
X-Nginx-Cache-Key
X-Mvc-Supplant-OutputCached
X-Clara-WADP
Apple-News-Services-Request-Url
X-ApacheServer
Esi-Enabled
Environment
X-Datadome
Cache-Name
Machine
X-WA-Info
Server-Ext
X-WADP-Cache
Country-Code
X-Platform
Server-Hostname
DSUID
Sever-Int
X-Dc
X-Geo-Region
X-Amz-Meta-Cb-Modifiedtime
X-Instance-Name
X-NCache
X-LB-NoCache
Ssr
NM-Fastcgi-Cache
NGX
X-AIR-PT
X-Section
Wxu-Next-Commit
X-Origin
Pics-Label
Wxu-Next-Hostname
X-Access
X-Op-Id-All
Server-Info
X-Akamai-Device-Characteristics
Wxu-Next-Region
X-Dispatcher-Server
X-Cache-Enabled
C-Via
X-API-Version
Hostname
X-Fastly-Request-Id
AMP-Access-Control-Allow-Source-Origin
X-TraceId
X-Via-Fastly
Memcached
X-Vgn-Hpd-Reason
X-JWT-State
X-Is-Gdpr
X-CACHE-GROUP
X-Has-Esi
X-Accel-Version
Time
Memory
Server-ID
X-Buckets
X-Varnish-Beresp-Grace
X-ZONE
X-Is-Desktop
X-Browser-Name
Cache-Hits
X-Is-Mobile
X-Is-Supported-Browser
X-Tcp-Rtt
X-Is-Tablet
X-HA-Backend
X-Scale
Origin-CC
IsBot
Origin-EX
X-SIPLIST1
Sid
X-TIM-N
X-Platform-Router
X-Platform-Processor
X-Platform-Cluster
Cdn-Requestid
X-PHP-Backend
X-Wp-Cf-Super-Cache-Active
X-Varnish-Beresp-Ttl
X-Air-Hostname
X-B3-Parentspanid
X-Air-Source
YJS-ID
X-Air-Trace-Id
X-Tb-Optimization-Total-Bytes-Saved
Location
CF-Ctrl
X-WP-CF-Super-Cache-Active
X-Backend-Instance
X-Cached-By
X-Internal-Host
Resin-Trace
X-Zone
X-Fpc
X-Azure-Ref-OriginShield
X-Cs
X-TA-CDN-Provider
Epwk-X-Cache
X-Hyper-Cache
GeoIP-Latitude
X-Frame-Option
X-Presslabs-Stats
X-Origin-Cache-Key
X-Origin-Expires
X-DataCenter
X-DC
X-Microcachable
Cache-Host
X-LiteSpeed-Cache-Control
Uri
XServer
GeoIp-Country-Code
X-Webstats-RespID
X-Nitro-Rev
X-Nitro-Cache-From
X-NewRelic-App-Data
X-NGINX-Cache
X-Site-Version
XM
X-VC
X-Service
X-Info
X-Web-Node
PFcat
X-Pod-Name
X-HN
True-Client-Ip
X-VarnishDD-TTL
X-Locale
X-CSRF-TOKEN
X-FTR-Cache-Status
X-FTR-Backend
X-Country-Code-Real
X-FTR-Backend-Server
X-VCache
X-FTR-Balancer
X-FTR-Expires
User-Agent
X-CS
X-Cache-Ttl
X-Ad-Defer-Variation
GeoIP-Country-Code
True-Client-IP
LB
Srvid
Cdn-Request-Time
X-Edge-Server
X-Via-SSL
X-FL-EDGE
X-FL-QIT-DEBUG
X-Via-CDN
X-Via-Edge
A
Locid
NtCoent-Length
Edge-Copy-Time
Cdn-Host
X-Datacenter
Cdn
X-Geo
Fastly-Drupal-Html
X-FPC
X-TRACE-ID
Req-ID
M-TraceId
WZWS-RAY
X-Vercel-Id
X-Vercel-Cache
X-Varnish-Authentication
X-Moov-T
X-Ad-Load-Variation
X-NMSegId
X-MSEdge-Features
X-MSEdge-Flight
X-Pad
X-Contensis-Viewer-Groups
X-Cache-ASPX
X-Moov-Xdn-Version
X-FireWall-Port
X-ATG-Version
X-HostName
Tcn
Cluster
X-Scope-Id
Cache-Key
SID
X-LiteSpeed-Tag
X-M-Log
X-M-Reqid
Content-Style-Type
Content-Script-Type
X-SRV
Pramga
WebServer
CountryCode
X-APP-VERSION
X-Cdn-Request-ID
X-Api-Version
Cf-Ipcountry
Cdnsip
X-AK-Request-ID
X-NWS-UUID-VERIFY
X-Amz-Meta-Opti
X-Qnm-Cache
X-Esi
Cdncip
X-Air-Pt
X-Varnish-Beresp-Status
X-Request-URI
X-Request-Start
X-Shield-Cache-Expires
Path
Edge-Cache
X-Cache-Date
X-Branch-Name
X-Wp-Cf-Super-Cache-Cookies-Bypass
X-Wp-Cf-Super-Cache
CDN
X-Wp-Cf-Super-Cache-Cache-Control
X-HS-Content-Campaign-Id
Yak-Timeinfo
Cache-Tv-Group
X-Planisys-CDN-Rules
X-Planisys-CDN-Cache
X-TH-Server
X-Planisys-CDN-TTL
X-WP-CF-Super-Cache-Cookies-Bypass
X-Platform-Server
X-Proxy-CacheRZ
XkeyRZ
State
X-Rebelmouse-Surrogate-Control
HostName
X-Rebelmouse-Cache-Control
X-Upstream-Ct
Lb
X-Upstream-Ht
X-CACHE-KEY
Tube-Got-Results
Tube-Got-Eval
X-Fastly-Cache
X-Cdn-Forward
Geoip-Latitude
Tube-Return
X-Akamai-Pragma-Client-IP
X-B3-Trace-ID
X-Acquia-Purge-Cdn-Unconfigured
Tube-Get-Contents
Click-Count-Error
X-Vgn-Hpd-Variations-Key
X-Tim-N
X-Vgn-Hpd-Ssi
X-Vgn-Hpd-Cached
Ohc-File-Size
X-Render-Time
Srv
X-Release
Click-Count-Action-Start
Server-Id
X-Aicache-OS
X-Req
X-SB
X-Servedbyhost
X-Ha-Backend
X-Wa
X-V-Cache
Proxy-Connection
X-Nc
X-Lb-Cache
X-Via-Popn
X-VCL-Version
X-Men
X-Via-Poph
X-User
Ohc-Cache-HIT
X-Rocket-Build-Number
MIME-Version
X-Via-Popv
X-HS-Status
X-Generated-In
X-Vary
X-Sigma-Backend
On-Server
X-Sigma
X-LB-ID
X-Traceid
V-Age
X-Cache-FS-Status
CF-Cached-On
X-Cache-Remote
X-Dw-Trace-Id
X-TT-LOGID
X-Fastly-Backend-Reqs
Ngx-Var-Key
X-CUA
Wpo-Cache-Message
PICS-Label
X-Lb-Nocache
X-Acquia-Site
X-Acquia-Purge-Tags
X-Via-Ucdn
X-Acquia-Application-Trace
Cache
X-Acquia-Application-UUID
X-EC-Lua
Wpo-Cache-Status
X-UA
X-Iplb-Instance
Yjs-Id
X-Iplb-Request-Id
X-Varnish-Beresp-TTL
Vha6-Origin
X-Fastly-Cache-Hits
X-GeoIP-City
Inserted-Into-Cache-At
X-Snapshot-Date
My-App
X-Via-PopN
X-Via-PopV
X-Via-PopH
X-Lb-Id
Warning
X-Cached-Since
Ngx
X-Udemy-Cache-App-Namespace
X-GoCache-CacheStatus
X-RAMCache
X-Miniprofiler-Ids
Cneonction
CACHE-MISS-TO-ORIGIN
X-Gamma-Serve
X-Scheme
X-Litespeed-Cache-Control
X-CF-Cache-Header-Vary
Log-Origin
X-CF-Cache-Header-Cache-Control
X-ElasticPress-Query