Threat Level: green Handler on Duty: Daniel Wesemann

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