Threat Level: green Handler on Duty: Jan Kopriva

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
Last-Modified
Link
Cf-Request-Id
CF-Cache-Status
Accept-Ranges
CF-RAY
ETag
X-XSS-Protection
Expect-CT
Pragma
X-Powered-By
Via
X-Cache
Age
Content-Security-Policy
Access-Control-Allow-Origin
Content-Language
Referrer-Policy
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-UA-Compatible
X-Cache-Hits
Alt-Svc
P3P
X-Served-By
X-Xss-Protection
X-Download-Options
X-Timer
Access-Control-Allow-Headers
X-Request-Id
X-Varnish
Access-Control-Allow-Methods
Access-Control-Allow-Credentials
X-AspNet-Version
X-Runtime
X-Adblock-Key
X-Permitted-Cross-Domain-Policies
Content-Security-Policy-Report-Only
X-Drupal-Cache
X-DNS-Prefetch-Control
X-Check
X-Cache-Status
X-Generator
X-Cacheable
Timing-Allow-Origin
P3p
X-Content-Security-Policy
X-Iinfo
X-Request-ID
Status
Feature-Policy
X-Envoy-Upstream-Service-Time
Content-Encoding
Access-Control-Expose-Headers
X-Drupal-Dynamic-Cache
X-CDN
X-AspNetMvc-Version
Upgrade
X-Via
CF-Ray
X-Ws-Request-Id
Access-Control-Max-Age
Server-Timing
EagleId
Keep-Alive
X-Cache-Group
X-Turbo-Charged-By
Request-Context
X-Age
X-Server-Powered-By
X-Proxy-Cache
X-AH-Environment
X-UA-Device
X-Backend
X-Hacker
X-Robots-Tag
Report-To
X-Amz-Request-Id
Host-Header
X-Server
X-LiteSpeed-Cache
X-Amz-Id-2
Grace
X-Rq
X-Nginx-Cache-Status
X-Varnish-Cache
X-Swift-SaveTime
X-Swift-CacheTime
Ali-Swift-Global-Savetime
X-Dns-Prefetch-Control
X-WebKit-CSP
X-Page-Speed
X-Vhost
X-OneAgent-JS-Injection
EagleEye-TraceId
X-Amz-Version-Id
X-Pingback
X-Device
X-Dispatcher
X-Styx-Req-Id
X-Pantheon-Styx-Hostname
X-Cache-Spec
NEL
X-Server-Id
X-Host
X-Backend-Server
Cf-Railgun
X-Node
X-Readtime
Accept-CH
X-Akam-SW-Version
Surrogate-Control
Request-Id
X-Response-Time
X-HW
Xkey
Accept-Ch-Lifetime
X-EdgeConnect-MidMile-RTT
X-EdgeConnect-Origin-MEX-Latency
X-Ruxit-JS-Agent
X-Application-Context
Content-Location
Rating
X-Ua-Compatible
X-Country
X-B3-TraceId
X-Language
X-Cache-Lookup
X-Cloud-Trace-Context
X-Ac
X-Url
X-Trace
X-Content-Type
X-Template
Allow
X-TtlSet
X-Varnish-TTL
X-Vname
X-PC
Accept-CH-Lifetime
X-Mod-Pagespeed
X-Clacks-Overhead
Edge-Control
X-FastCGI-Cache
X-ESI
Cache-Tag
Fastly-Restarts
X-Server-Name
X-Rack-Cache
Service-Worker-Allowed
X-VARITI-CCR
X-Element-Page-Cache
Verso
X-MS-InvokeApp
X-Buckets
X-GitHub-Request-Id
X-Upstream
Accept-Ch
X-Amz-Rid
MS-Author-Via
Public-Key-Pins
X-Vcap-Request-Id
X-Dw-Request-Base-Id
X-Cached
X-Client-IP
X-D2id
X-Abt-Application-Version
X-Origin-Cache
X-Cache-TTL
Arr-Disable-Session-Affinity
X-ORACLE-DMS-RID
X-ORACLE-DMS-ECID
X-Px
X-Cnection
X-Powered-By-Plesk
X-Aws-Lambda-Call-Status
X-Country-Code
Access-Control-Request-Method
X-Goog-Hash
X-Navigation-Version
X-NF-Request-ID
X-Kraken-Loop-Name
X-Server-Lifecycle-Phase
X-Instrumentation
RTSS
X-Version
X-Powered-CMS
X-Amz-Server-Side-Encryption
X-Sol
Display
Pagespeed
X-Middleton-Display
X-Use-Magma
X-Kinja-Revision
X-Kinja-Server
X-SRCache-Fetch-Status
X-SRCache-Store-Status
X-Kinja-Build
X-Exp-Variant
X-Cdn-Fetch
X-Exp-Id
X-Kinja
X-GoogleNews-Bot
Response
X-Middleton-Response
X-MSEdge-Ref
X-LLID
X-Edge-Location-Klb
X-Kinsta-Cache
X-Edge
AR-ATIME
AR-SID
AR-CACHE
AR-PoweredBy
AR-Request-ID
X-TTL
Nginx-Cache
X-B3-TraceId-Primal
Mrf-Cache-Status
MRF-Tech
X-Shield-Request-Id
X-HP-Webp
X-Jurisdiction
S
X-HP-Trace-Id
X-Protected-By
X-T
X-RateLimit-Remaining
Content-MD5
X-Forwarded-For
X-Content-Security-Policy-Report-Only
X-Aspnetmvc-Version
X-Mg-S
X-Id
X-CST
TCN
Realpath
Fastcgi-Cache
X-Mid
X-MCACHE
Edge-Cache-Tag
SPRequestDuration
SPIisLatency
Front-End-Https
X-Recruiting
X-Parallel-Accel
X-Request-Processing-Time
X-Request-Received
Filters
Fusion-Deployment-Id
Fusion-Source
Server-Node
Fusion-Content-Id
Fusion-Template-Id
Fusion-Content-Source
Pinterest-Version
X-Pinterest-Rid
Fusion-Component-Id
Pinterest-Generated-By
X-Content
X-Ua-Browser
X-Ab
SPRequestGuid
X-SharePointHealthScore
X-Correlation-Id
Server-Name
X-Ezoic-Cdn
X-ECACHE
X-Ttl
X-NWS-LOG-UUID
X-DynaTrace
X-Frontend
Alternate-Protocol
X-HS-Content-Id
X-HS-Cache-Config
X-HS-Hub-Id
X-HS-Combine-CSS
X-Yandex-Sdch-Disable
X-Hits
X-Accel-Expires
X-Content-Options
X-Tt-Trace-Tag
X-Tt-Trace-Host
X-Cache-Key
MicrosoftSharePointTeamServices
Cache-Tags
X-Page-Id
X-Ruxit-Js-Agent
X-Git-Hash
Host
X-Ser
Charset
Cleartype
X-Kong-Proxy-Latency
X-B3-Sampled
X-Www-Served-By
X-Kong-Upstream-Latency
X-Fastly-Request-Id
X-Amz-Replication-Status
X-Content-Digest
X-Geo-Country
X-Daa-Tunnel
Filterid
TP-L2-Cache
TP-Cache
X-Forwarded-Proto
X-Amzn-Trace-Id
X-XRDS-LOCATION
X-VCache
X-Varnish-Age
X-DIS-Request-ID
X-Az
X-Activity-Id
X-AppVersion
X-Debug-Info
X-Rid
X-N
X-Upgrade-Enabled
X-Origin-Server
X-Hostname
X-Grace
Access-Control-Allow-Method
X-FB-Debug
X-LB-Cache
X-Nginx-Upstream-Cache-Status
X-Origin-Upstream-Status
X-WebKit-CSP-Report-Only
ServerID
X-Request-Handler-Origin-Region
X-Microsite
X-Mobile-URL
X-Request-Guid
X-Is-Crawler
X-Route-Name
X-Flags
Cross-Origin-Opener-Policy
X-Aspnet-Duration-Ms
X-Providence-Cookie
X-Whom
X-Server-ID
X-F-Cache
X-Goog-Stored-Content-Length
X-NGENIX-Cache
X-Goog-Stored-Content-Encoding
X-TT
X-Goog-Generation
X-Goog-Metageneration
X-Goog-Storage-Class
X-GUploader-UploadID
X-Tb
X-App-Server
X-Varnish-Grace
X-App-Environment
Viewport
X-Distributor
X-FW-Dynamic
X-FW-Serve
X-FW-Hash
X-FW-Server
X-FW-Static
X-FW-Type
Payment
Paypal-Debug-Id
Node
DC
X-Cache-Control
X-Seen-By
X-Type
Fastcgi-Useragent
X-Logged-In
X-User-Agent
X-Ratelimit-Limit
X-Litespeed-Cache
Accept-Charset
Country
X-PressLabs-Stats
X-Cache-Age
X-Cache-Rule
X-Webkit-CSP
X-Wix-Request-Id
X-Varnish-Backend
Version
X-Erf-Bev-Bev-Is-Generated
X-Browser-Type
X-Erf-Bev-Bev
X-Load-Cache
X-Node-Name
X-TEC-API-ROOT
X-TEC-API-VERSION
X-TEC-API-ORIGIN
Refresh
X-Cache-Action
Referer-Policy
X-IPLB-Instance
X-Via-JSL
X-Drupal-Cache-Tags
X-Fastly-Request-ID
Access-Control-Request-Headers
Cache-Status
SD-X-WS
X-Response-Served-From
X-Original-Request-Id
X-Jobs
X-Page-View
X-Proxy-Cache-Status
X-Is-Bot
X-Vgn-Hpd-Reason
X-DataDome
X-Cacheable-TTL
X-Real-IP
X-Cluster-Name
X-Rendered-As
VIX-Pulpo-Upstream-Status
X-Fastcgi-Cache
X-RemovedCookies
NGB
X-B-Cache
X-Cache-Expired-At
X-UUID
X-Signature
X-Debug
X-Mobile
X-B
VIX-Pulpo-Node
X-ProcessESI
X-Revision
Amp-Access-Control-Allow-Source-Origin
X-Contextid
X-Proxy
X-Yottaa-Optimizations
X-Rule
X-Yottaa-Metrics
X-Device-Type
Akamai-GRN
Surrogate-Key
DynaTrace
X-Framework
X-G
X-Instance
X-Cache-Time
X-Drupal-Cache-Contexts
X-Debug-IsConnected
X-Debug-IsPreview
X-FW-Version
Liferay-Portal
CF-IPCountry
X-Air-Trace-Id
X-Air-Hostname
X-Air-Source
SID
Healthy
X-Azure-Ref
X-Oracle-Dms-Ecid
X-Oracle-Dms-Rid
X-Source
X-Tec-Api-Root
X-Tec-Api-Version
X-Tec-Api-Origin
X-Ms-Version
X-Ms-Request-Id
X-CDN-Forward
X-Oneagent-Js-Injection
X-Nginx-Cache
Frame-Options
MS-CV
X-RTag
Ms-Operation-Id
X-Cache-Hit
X-Tumblr-Pixel-1
Count-Hit
X-XRDS-Location
X-Tumblr-Pixel
X-Tumblr-Pixel-0
X-Tumblr-User
Countrycode
X-Environment-Context
X-L-Path
X-Varnish-Server
Xserver
X-Cache-Operation
Uber-Trace-Id
X-Region
Section-Io-Cache
X-EdgeConnect-Cache-Status
X-Servername
X-Accel-Buffering
X-APP-VERSION
X-Forwarded-Host
X-Content-Powered-By
X-Ratelimit-Reset
X-Backend-Name
X-Mode
GEO-INFO
X-IPS-LoggedIn
Cross-Origin-Window-Policy
Ec-Rule-Version
X-Zen-Fury
Backend
X-UPSTREAM-Address
X-RN-RSRV
Meta-Geo
X-Detected-As
X-JoinUs
X-SaId
X-Sql-Count
X-Sql-Duration-Ms
X-Tid
Eomportal-Instance
X-Sorting-Hat-ShopId
X-Sorting-Hat-PodId
X-ShardId
X-Cache-Server
Country-Code
X-ShopId
X-Adobe-Content
X-Cache-Type
X-Generation-Time
X-Human
X-Hosted-By
X-Redis-Cache
X-Adobe-Loc
X-Debug-Cache
X-Alternate-Cache-Key
X-Shopify-Stage
X-Cache-Grace
X-Uri
X-Varnish-Beresp-Grace
X-ProxyCache-Status
Url
X-ProxyCache-Key
Decoy-Debug-TTL
Cache-Name
Apigw-Requestid
Mn-Server-Ip
X-Site-Version
X-Cache-NGX
X-RateLimit-Limit
X-ServerID
X-PHP-Backend
X-NCache
X-Via-Fastly
X-Cache-TTL-Remaining
DB-Nickname
X-Status
Decoy-Debug-Status
X-BYPASS-REASON
X-Microcachable
X-UA-Device-Type
X-No-Session
Cache-Tv-Group
X-Origin-Date
X-FB-TRIP-ID
Decoy-Debug-Key
Property-Id
Fastly-SSL
Protected
X-Timing-Wait
X-Origin-Hint
X-Akamai-Edgescape
X-SayCDN-TTL
X-Storage
X-Cache-Host
X-OCL
X-Say-Cacheable
X-Web-Node
X-Say-TTL
X-Format
Webcakes-Region
X-PCL
TWC-GeoIP-LatLong
TWC-GeoIP-Country
TWC-Device-Class
TWC-Connection-Speed
TWC-Locale-Group
TWC-Privacy
X-Proxy-Build
X-Rewrite-Enabled
Webcakes-App-Name
Selected-Fe
Webcakes-App-Version
X-Routing-Service
X-Proxied
X-Server-W
X-Zipkin-Id
OT-Force-Account-Verify
X-Extlb
X-Varnishpool
X-Hl-Ver
X-NYM-Debug-Backend
X-Pubstack
X-R9-Blue-Green-Version
X-Section
X-Soup
X-Access
Azure-Version
Azure-SiteName
Azure-InstanceId
Azure-RegionName
Azure-SlotName
X-ApacheServer
X-PERF
X-Be
Content-Secure-Policy
X-Cluster-Node
X-Azure-Ref-OriginShield
X-LSADC-Cache
Source
X-Ua
X-App-Version
X-Webkit-Csp
X-Content-Age
X-Presslabs-Stats
X-Time
SRV
CDN-EdgeStorageId
CDN-CachedAt
X-NewRelic-App-Data
CDN-Cache
CDN-RequestCountryCode
CDN-Uid
X-Cached-By
CDN-PullZone
Content-Disposition
CDN-RequestId
Cache
X-Generated-By
X-TT-LOGID
X-HTML-Minification-Powered-By
X-SRV
X-Dc
X-Hyper-Cache
X-LAGOON
X-Cache-Var
X-Amz-Meta-S3cmd-Attrs
X-Cache-Var-Map
X-Unique-Id
X-Loop
X-Varnish-Hits
X-Bc-Bl
X-Varnish-Hostname
X-TNCMS
X-Nginx-Cache-Key
X-Trace-Id
X-S-Maxage
X-Auto-Login
Onion-Location
LB
X-Origin-CC
X-Origin-TTL
Xet-Cookie
Cache-Hits
X-GEO
Retry-After
X-Cdn
X-Tumblr-Pixel-3
Web-Mar-Node
X-Tumblr-Pixel-2
X-Proto
Mime-Version
Webserver
HostName
X-Qnm-Cache
X-Tenant
X-Time-Microsecs
X-M-Log
X-Platform-Server
X-M-Reqid
X-Endurance-Cache-Level
X-Akamai-Transformed
X-CSRF-Token
X-Edge-Location
WPO-Cache-Status
WPO-Cache-Message
X-AWS-Id
X-GG-Cache-Date
X-VWS-Id
X-LJ-Flow-ID
CloudFront-Viewer-Country
X-Xfnlog-Site
X-B3-SpanId
X-Cache-Remote
X-CACHE-KEY
X-ECache
X-Cache-Tags
X-Ratelimit-Remaining
X-Mg-Request-UUID
N-Cache
X-Amzn-RequestId
X-Varnish-Cache-Hits
X-Labrador-Cache-Channel
X-Amz-Apigw-Id
X-PHP-Host
Upgrade-Insecure-Requests
X-TIME
X-Request-Time
ServedBy
X-RCS-CacheZone
X-Correlation-ID
X-AOL-HN
Nel
X-Via-NSCOPI
X-Handled-By
X-Origin-Response-Time
X-Locale
X-A-Wwc
X-A-Dgt
X-CF-Lambda-Fn
X-A-Dcw
X-A-Dam
X-Planisys-CDN-TTL
X-A-Ccd
X-Cache-NE
X-Cache-Date
X-ARC
X-Application
X-Conf
X-Connection-Hash
X-B-Cookie
X-Cluster
X-Block-Status
X-CF-Lambda-Version
X-Ckpd-Fst-Backend
X-Aed
X-Developer
X-Ig-Push-State
X-Hnp-Log
Origin
X-External-Request-Id
Pramga
DCR-Processing-Time-Ms
DSUID
Odigeo-Trace-Id
Mobile-Detection-Method
X-Forwarded-Path
X-Ftr-Request-Id
Meta-Geo-Continent
X-Gen-Mode
Expiry
Fastcgi-X-Cache-Version
Redirect-Candidate
DCR-Decision-By
X-D
User-Cache-Control
X-PAYTM-SRV-ID
X-A
X-Planisys-CDN-Cache
X-PBS-Appsvrname
Surrogated-Key
X-Destination
A
BehaviorPad-Version
Rendered-Blocks
X-NAPM-TraceId
X-Orig-Expires
X-ND-Cache
X-Planisys-CDN-Rules
X-Processor
X-S-Cookie
X-VG-WebCache
X-S
X-Rojux
X-Vtex-Remote-Cache
X-Vtex-Processado-Em
X-ScT
X-SD-PageType
X-Vdms-Version
X-Vdms-Path
X-Shop-Environment
X-Slack-Backend
X-SRCache-Key
X-Session-Fingerprint
X-SVT-ORM-RULES
X-Storefront-Renderer-Rendered
X-TIM-N
X-V-Cache
X-Request-Host
Xc-Version
X-SVT-ORM-VERSION
X-VC-Cache
AMP-Access-Control-Allow-Source-Origin
X-MP-GENERATED-AT
X-Reqid
Wxu-Next-Commit
X-Device-Os
Fastcgi-Cache-TTL
Origin-EX
X-Skip-Cache
X-Epic-Correlation-Id
Cmstype
Cmsid
X-Li-Fabric
X-Adobe-Source
X-ATG-Version
Wxu-Next-Region
Origin-CC
Wxu-Next-Hostname
Vix-Hermes-Req-Id
X-Gdpr
X-Sucuri-Cache
CDCHOST
L
X-Proxy-Upstream
X-Sucuri-ID
X-Forwarded-Site
Traceparent
X-Fetched-On
Host-ID
V-Age
X-Varnish-Beresp-Status
State
X-Fastly-Cache
Gh-Request-Id
X-Geo-Header
X-Date
X-Hash
X-LI-UUID
X-Li-Pop
X-VServer
X-Scheme
X-Nyt-Route
X-Core-Mission
Server-Info
X-Origin-Expires
X-Origin-Time
X-Cache-Bucket
X-Cache-Info
X-Policy
X-Webstats-RespID
X-Owner
X-Rocket-Nginx-Serving-Static
X-Served-From
X-Old-Content-Length
X-Accel-Expires-Debug
AKAMAI
Release
X-Server-IP
X-Location
Arc-Country
X-Mvc-Supplant-Cachable
X-Men
CacheControlHeader
X-FireWall-Port
From-Origin
Environment
X-Cdn-Srv
X-Branch-Name
Svr
Req-Svc-Chain
X-Cache-Config
X-Aicache-OS
Sslversion
Server-Host
TDXMobile
X-Cache-Id
X-Cache-Debug
X-Developers
Thinkindot-CacheControl
X-Datadog-Trace-Id
Web-Mar-Region
X-Viewer-Country
We-Hiring
X-Datadog-Parent-Id
X-Datadog-Sampling-Priority
True-Client-Country-4JS
X-Core-Value
X-BBC-Edge-Cache-Status
X-Bip
Thinkindot-CacheControl-Type
Thinkindot-Control
X-VG-TLSProxy
X-VarnishDD-TTL
X-Gamma-Serve
X-HS-Content-Campaign-Id
X-Irp-Debug
X-Sigma-Backend
X-Request-Start
X-Sn-Servicetimems
X-Req
X-Gzip
Fastly-GeoIP-CountryCode
X-HN
X-Level-Front-Cache
X-Platform
X-Node-Id
X-NodeID
X-Rocket-Build-Number
Apple-News-Services-Handled
Apple-News-Services-Host
X-Sigma
Apple-News-Services-Request-Url
Apple-News-Services-Parsed-Url
X-GeoIP-City
X-Region-Sid
PFcat
X-Magnolia-Registration
X-Esi-Check
X-TH-Server
X-GeoIP
X-Fastly-Backend
Mail-Subject
Machine
X-Generated-On
X-TrackingId
X-Cdn-Origin
Locid
X-Thinkindot-L3
X-Thanos
X-Xrds-Location
X-EC-Lua
X-CS
X-Request-URI
Ssr
X-Qloud-Router
X-Worker
X-Response-By
X-Rebelmouse-Surrogate-Control
X-Pod-Name
X-Rebelmouse-Cache-Control
X-RateLimit-Remaining-Second
X-CGP
X-RateLimit-Limit-Second
X-Is-Gdpr
X-DefHash
X-FC-Vary-Parameters
X-DefElseHash
X-Variation
X-Eu-Site
X-Envoy-Decorator-Operation
X-DPWN-IS-SECURE
X-Varnish-CookieHashed-On
X-Has-Esi
X-JWT-State
X-Loc
X-NU-AKA-ACS-Version
X-Varnish-Remaining-TTL
X-UnsetCookies
X-Varnish-CookieINHashed-On
X-Csrf-Jwt
X-Origin
X-Amzn-Remapped-Content-Length
Is-Eu
HA-Ipaddr
Ha-Gx-Prefs
L5d-Success-Class
Memcached
NM-Fastcgi-Cache
NGX
Fastly-SWR
Fastly-SIE
Fastly-Drupal-Html
X-Zone
X-Datadome
WP-Super-Cache
Candidate-Md5Url
Datacenter
Cf-Device-Type
Platform
Adler-Geo
X-Backend-State
X-Ua-Device
X-Mvc-Supplant-OutputCached
X-CLOUD-TRACE-CONTEXT
X-Tx-Id
X-Dynatrace
On-Server
X-API-Version
X-NC
WWW-Authenticate
Pics-Label
X-LB-ID
X-Varnish-Beresp-Ttl
X-Up
CDN
X-Cache-Enabled
X-Backend-TTL
X-Generated-In
Esi-Enabled
X-NWS-UUID-VERIFY
X-Vc
X-Trace-ID
Ms-Author-Via
X-GeoIP-Region-Code
Time
Memory
X-Refresh
X-DynaTrace-JS-Agent
NtCoent-Length
X-GeoIP-Country-Code
Magicmarker
X-LB-NoCache
X-Tb-Optimization-Total-Bytes-Saved
X-Via-Popv
X-Via-Popn
X-Via-Poph
C-Via
X-Edge-Pop
X-TraceId
X-Service
X-TA-CDN-Provider
X-Cache-PHP
Env
GeoIp-Country-Code
X-Parent-Response-Time
X-DC
X-CacheTTL
X-Optimistic-Header
WebServer
X-Restarts
Kp-EeAlive
X-Tt-Logid
X-Varnish-Beresp-TTL
S-Rt
X-Esi
X-Cache-Status-Check
X-Render-Time
X-Srv
X-Unique-ID
X-RPM
X-Servedbyhost
X-DI
X-DW
X-DB
X-Action
X-DSS
X-RPS
X-MSEdge-Features
X-ZONE
X-MSEdge-Flight
X-TX-ID
X-RSL
X-Cache-Backend
X-Wix-Viewer-Type
Edge-Cache
Server-ID
X-Info
Tcn
X-Minions-Version
X-AIR-PT
X-Cs
X-Akamai-Request-ID2
X-Http-Reason
X-HA-Backend
X-Clientip
X-App
X-VCL-Version
X-Cache-Ttl
X-Li-Proto
X-Newrelic-Synthetics
Proxy-Connection
Geo-Info
X-URL
HIT
UCS
X-Oss-Server-Time
X-Webkit-Csp-Report-Only
X-FPC
X-LI-Proto
X-Fpc
X-Oss-Storage-Class
X-Varnish-Ttl
Cache-Host
X-Oss-Request-Id
Test
X-Oss-Hash-Crc64ecma
X-Oss-Object-Type
Accept-Language
X-Traceid
Server-Id
S-Cnection
X-Vcl-Version
X-HostName
X-NODE
X-LiteSpeed-Cache-Control
X-Webkit-CSP-Report-Only
X-User
X-Ec-Fail
X-Ec-GeoHdr
Section-Io-Origin-Status
Lb
Section-Origin-Responded
X-B3-Spanid
Section-Io-Id
Section-Io-Origin-Time-Seconds
X-Urbn-Site-Id
X-Urbn-Context-Path
Locale
X-Micro-Cache
X-Pass-Why
Fastly-Backend-Name
User-Agent
X-LiteSpeed-Tag
Cf-Int-Pingora-Origin-Digest
X-Pad
Fastly-Drupal-HTML
X-Backend-Host
X-CSRF-TOKEN
M-TraceId
Cdnsip
X-AK-Request-ID
X-APP
X-Ha-Backend
X-BBC-Origin-Response-Status
Cdncip
X-BCube-Filmed-By
Resin-Trace
X-ID
X-Release
X-ServedByHost
Hostname
Geoip-Latitude
X-Check-Cacheable
My-App
Ohc-File-Size
Hit
Cluster
X-Clara-WADP
X-Fmm-Version
GeoIP-Country-Code
X-WADP-Cache
X-Dynatrace-Js-Agent
X-ES-SERVER
X-Geo
CPC-Age
ENV
X-ElasticPress-Query
VNS-Cache
VNS-Age
Cache-Key
Path
X-WA
X-WA-Info
X-Var-Ttl
MIME-Version
X-Edge-POP
X-Via-PopH
X-Via-PopN
CPC-Cache
X-CUA
Tracecode
EpKe-Alive
X-Amz-Meta-Cb-Modifiedtime
X-Via-PopV
X-Edge-Cache
X-Api-Version
X-From
X-NGINX-Cache
T-Server
X-HS-Status
Load-Balancing
Lfy
Srv
X-Akamai-Pragma-Client-IP
X-PJAX-URL
X-Cms-Context
X-Fragments
Shield-Pop
Pagetype
X-Ucs
X-Fastly-Backend-Reqs
X-Wikidot-Static-Cache
X-ServerName
X-RAMCache
URI
X-Wikidot-Backend
Lang
X-Cdn-Forward
X-WP-CF-Super-Cache-Cache-Control
X-WP-CF-Super-Cache
X-CCDN-CacheTTL
X-Fastly-Cache-Hits
Target-Params
X-UP
X-Via-Ucdn
Servername
X-Hcs-Proxy-Type
X-Mcache
X-GoCache-CacheStatus
MD5-Digest
X-CCDN-Origin-Time
X-Dw-Trace-Id
X-TRACE-ID
X-VC
WZWS-RAY
X-Cdn-Request-ID
X-SIPLIST1
Uri
X-Lb-Id
Server-Ext
Cneonction
X-Nc
DataCenter
X-B3-ParentSpanId
Cdn
Ohc-Cache-HIT
X-RateLimit-Reset
IsBot
X-VG-WebServer
Sever-Int
Server-Hostname
X-Swift-Error
X-Apw-Access-Action
X-Acquia-Application-UUID
X-Apw-Access-Token
X-Acquia-Site
X-Lb-Nocache
X-Newrelic-App-Data
X-Acquia-Purge-Tags
X-Acquia-Application-Trace
X-Apw-Hits
Cf-Ipcountry
X-Apw-Access-Object
X-Cache-Expires
Vha6-Origin
X-Yottaa-OS
PICS-Label
Cteonnt-Length
CF-Cached-On
W
X-Snapshot-Date
X-Cache-ASPX
X-Contensis-Viewer-Groups
Sid
X-Air-Pt
X-Cache-Ngx
X-Http-Count
X-Httpd
X-Proxy-Cache-Info
Server-Ttl
FSS-Cache
X-Akamai-ERPolicy
X-Akamai-ERRuleID
X-Te-Count
X-Te-Duration-Ms
X-Last-Modified
Permissions-Policy
X-Http-Duration-Ms
ServerName
X-Akamai-Request-ID
X-Miniprofiler-Ids
Dnion-Transfer-Encoding
X-Provided-By
X-B3-Parentspanid
X-Platform-Router
X-Platform-Cluster
X-Platform-Processor
X-Varnish-Authentication
HitType
CountryCode
X-Sentry-ID
Req-ID
X-UA
X-Logging-Id
X-CacheKey
Ngx