Threat Level: green Handler on Duty: Johannes Ullrich

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