Threat Level: green Handler on Duty: Didier Stevens

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