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