Threat Level: green Handler on Duty: Renato Marinho

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