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
X-Frame-Options
Expires
Strict-Transport-Security
Content-Length
X-Content-Type-Options
Link
Accept-CH
Last-Modified
CF-Cache-Status
ETag
X-XSS-Protection
Expect-CT
Accept-Ranges
Pragma
X-Powered-By
CF-RAY
X-Cache
Via
Age
Content-Security-Policy
Alt-Svc
Report-To
NEL
Referrer-Policy
Access-Control-Allow-Origin
Content-Language
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-Cache-Hits
P3P
X-UA-Compatible
X-Served-By
X-Download-Options
X-Request-Id
X-Timer
X-Xss-Protection
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Varnish
CF-Ray
X-Adblock-Key
X-Permitted-Cross-Domain-Policies
Access-Control-Allow-Credentials
Accept-CH-Lifetime
X-DNS-Prefetch-Control
Content-Security-Policy-Report-Only
X-AspNet-Version
X-Runtime
Permissions-Policy
Server-Timing
X-Drupal-Cache
X-Generator
X-Envoy-Upstream-Service-Time
X-Cache-Status
X-Ua-Compatible
X-Cacheable
X-FRAME-OPTIONS
X-Iinfo
X-Drupal-Dynamic-Cache
Timing-Allow-Origin
Feature-Policy
X-CONTENT-TYPE-OPTIONS
Cf-Request-Id
X-Content-Security-Policy
Xkey
Upgrade
Access-Control-Expose-Headers
X-CDN
Content-Encoding
X-XSS-PROTECTION
Status
X-AspNetMvc-Version
Accept-Ch
Access-Control-Max-Age
Host-Header
X-Amz-Request-Id
X-Age
X-Amz-Id-2
Request-Context
Cf-Edge-Cache
X-Backend
X-Robots-Tag
X-Hacker
Keep-Alive
X-Via
Cf-Apo-Via
X-Request-ID
X-Turbo-Charged-By
X-Amz-Version-Id
X-Rq
X-AH-Environment
X-Cache-Group
X-Vhost
X-Server
X-Dispatcher
X-Proxy-Cache
X-Ws-Request-Id
EagleId
CONTENT-SECURITY-POLICY
X-UA-Device
X-Varnish-Cache
Pantheon-Trace-Id
Grace
X-Styx-Req-Id
X-Pantheon-Styx-Hostname
X-Server-Powered-By
X-Litespeed-Cache
X-OneAgent-JS-Injection
X-Pingback
Allow
X-Page-Speed
X-WebKit-CSP
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-Swift-SaveTime
X-Swift-CacheTime
Ali-Swift-Global-Savetime
X-Dns-Prefetch-Control
X-FTR-Request-ID
X-Node
X-Device
X-Server-Id
X-Cache-Lookup
EagleEye-TraceId
X-Host
X-Country-Code
X-Backend-Server
Surrogate-Control
X-Cloud-Trace-Context
X-Readtime
X-Akam-SW-Version
Cf-Railgun
X-HW
X-Ruxit-JS-Agent
X-Response-Time
X-LiteSpeed-Cache
Cache-Tag
P3p
X-Amz-Server-Side-Encryption
Content-Location
X-Ua-Device
Cross-Origin-Opener-Policy
X-Rack-Cache
X-Nginx-Upstream-Cache-Status
X-Trace
X-Nginx-Cache-Status
Service-Worker-Allowed
Request-Id
X-TraceId
Fastly-Restarts
X-Application-Context
X-Content-Type
X-Times
X-Clacks-Overhead
X-PC
X-Vname
X-TtlSet
Rating
X-Cnection
X-Oneagent-Js-Injection
X-Nf-Request-Id
X-Edge
X-Midtier
X-Mcache
X-ESI
X-Browser-Type
X-Country-Code-Real
X-FTR-Backend
X-FTR-Backend-Server
X-FTR-Balancer
X-FTR-Cache-Status
Edge-Control
X-FTR-Expires
X-Vcap-Request-Id
X-Cache-TTL
Origin-Trial
Accept-Ch-Lifetime
X-FastCGI-Cache
Surrogate-Key
X-Powered-By-Plesk
X-NWS-LOG-UUID
X-Country
X-Element-Page-Cache
X-Kinja-Server
X-GoogleNews-Bot
X-Kinja-Build
X-Exp-Id
X-Exp-Variant
X-D2id
X-Cdn-Fetch
X-Kinja
X-Kinja-Revision
X-Abt-Application-Version
X-Ac
Verso
X-Upstream
X-B3-TraceId
X-Mod-Pagespeed
X-ORACLE-DMS-RID
X-Navigation-Version
X-Amz-Rid
X-Url
Nginx-Cache
X-GitHub-Request-Id
X-ECACHE
X-Language
Pinterest-Generated-By
Pinterest-Version
X-Pinterest-Rid
Display
X-Sol
X-Middleton-Display
Pagespeed
X-Envoy-Decorator-Operation
X-Server-Lifecycle-Phase
X-PDP-UNCACHING-HASH
X-Kraken-Loop-Name
X-Instrumentation
Response
X-Erf-Bev-Bev
X-Middleton-Response
X-Erf-Bev-Bev-Is-Generated
S
AR-ATIME
AR-PoweredBy
AR-Request-ID
Akamai-GRN
Edge-Cache-Tag
X-MS-InvokeApp
X-Ruxit-Js-Agent
X-Goog-Hash
X-Distributor
X-Ratelimit-Limit
X-Resp-Is-Stale
X-Kinsta-Cache
X-Edge-Location-Klb
X-Ttl
X-Ser
X-ARC
X-SharePointHealthScore
SPRequestGuid
SPRequestDuration
SPIisLatency
X-Client-IP
Front-End-Https
X-Shield-Request-Id
Access-Control-Request-Method
X-NGENIX-Cache
X-Content-Digest
X-Ezoic-Cdn
X-Varnish-TTL
X-Dw-Request-Base-Id
X-Amzn-Trace-Id
X-Recruiting
X-Cache-Key
RTSS
Cache-Status
X-Version
X-Mg-S
X-Powered-CMS
X-T
Public-Key-Pins
X-MSEdge-Ref
TP-Cache
Fastcgi-Cache
X-HS-Hub-Id
X-HS-Cache-Config
X-HS-Content-Id
X-Accel-Expires
X-Daa-Tunnel
Arr-Disable-Session-Affinity
X-Ismobilevalue
AR-CACHE
X-Cluster-Name
Cache-Tags
X-Cached
X-Id
Realpath
X-Correlation-Id
X-Content-Security-Policy-Report-Only
Content-MD5
X-Forwarded-For
X-Fastly-Request-ID
X-HS-Combine-CSS
X-Request-Processing-Time
X-Request-Received
Payment
X-Newrelic-App-Data
X-Kong-Upstream-Latency
X-Ua-Browser
X-Kong-Proxy-Latency
Ar-SID
X-DIS-Request-ID
X-RateLimit-Remaining
X-GUploader-UploadID
YJS-ID
X-Jurisdiction
X-HP-Webp
X-HP-Trace-Id
X-Cambria-Cache-Control
X-Azure-Ref
X-HS-Prerendered
X-HS-CF-Cache-Status
X-Request-Device-Id
X-COUNTRY
X-Xrds-Location
X-Amz-Replication-Status
Content-Disposition
X-Webkit-Csp
X-Ratelimit-Remaining
Count-Hit
X-SERVER-NAME
X-Server-Name
X-Origin-Server
X-Unique-Id
X-Px
Cleartype
X-Ratelimit-Reset
Cross-Origin-Resource-Policy
Cross-Origin-Embedder-Policy
X-Page-Id
X-Rid
X-Amz-Meta-S3cmd-Attrs
X-FB-Debug
X-SRCache-Store-Status
X-SRCache-Fetch-Status
X-VARITI-CCR
X-Protected-By
X-Meli-Trace-Bu
X-Proxy
X-Meli-Trace-Platform
X-Git-Hash
X-Meli-Trace-Site
X-AppVersion
X-Az
X-Activity-Id
Accept-Charset
MicrosoftSharePointTeamServices
X-Logged-In
X-Www-Served-By
X-Load-Cache
X-LLID
X-Goog-Metageneration
X-ORACLE-DMS-ECID
X-Amzn-RequestId
X-CST
X-Amz-Apigw-Id
X-TTL
X-Microsite
X-Request-Handler-Origin-Region
Version
X-Template
X-Varnish-Backend
X-Geo-Country
X-Hits
X-Forwarded-Proto
X-Upgrade-Enabled
Server-Node
Server-Name
X-PressLabs-Stats
X-Hostname
X-TEC-API-ROOT
X-TEC-API-VERSION
X-B3-Sampled
X-TEC-API-ORIGIN
X-Content-Options
X-WebKit-CSP-Report-Only
Section-Io-Cache
X-Varnish-Grace
Viewport
X-App-Server
X-Grace
X-TT
Access-Control-Allow-Method
X-Fb-Rlafr
AKAMAI-GRN
X-Device-Type
Fastly-SWR
X-Frontend
X-B
Healthy
Fastly-SIE
Mrf-Cache-Status
MRF-Tech
Alternate-Protocol
X-B3-TraceId-Primal
X-Status
X-Varnish-Server
TCN
X-Request-Guid
X-Goog-Stored-Content-Length
X-Goog-Storage-Class
X-Goog-Stored-Content-Encoding
X-Goog-Generation
Upgrade-Insecure-Requests
DC
X-Contextid
X-Magnolia-Registration
Host
X-EdgeConnect-Cache-Status
X-CSRF-Token
X-Amzn-Remapped-Content-Length
Retry-After
X-Cache-Age
X-Cache-Control
Amp-Access-Control-Allow-Source-Origin
MS-Author-Via
X-App-Version
X-Tt-Trace-Host
X-Tt-Trace-Tag
X-Oracle-Dms-Ecid
X-Requestid
X-Buckets
X-Debug
X-Type
X-Revision
Frame-Options
X-Tec-Api-Version
X-Varnish-Ttl
X-Tec-Api-Root
X-Tec-Api-Origin
X-Origin-CC
X-Response-Served-From
X-INCAP-ABP
X-Seen-By
X-Original-Request-Id
X-Instance
X-Backend-Name
X-Origin-TTL
SD-X-WS
X-WP-CF-Super-Cache
X-Cache-Status-Check
X-Yottaa-Optimizations
X-RemovedCookies
X-Tumblr-User
X-Tumblr-Pixel
X-Tumblr-Pixel-1
X-Hl-Ver
X-Tumblr-Pixel-0
X-UUID
X-Adobe-Content
X-N
X-ProcessESI
X-Adobe-Loc
X-Yottaa-Metrics
X-WP-CF-Super-Cache-Cache-Control
X-Akamai-Edgescape
X-G
VIX-Pulpo-Node
X-Framework
Section-Io-Id
X-Debug-IsPreview
X-Debug-IsConnected
X-Mg-Request-UUID
X-NYM-Debug-Backend
X-Rendered-As
Access-Control-Request-Headers
X-Akamai-Request-ID2
X-ServerID
X-Is-Bot
X-Mobile
X-Lambda-Id
VIX-Pulpo-Upstream-Status
X-URL
Cross-Origin-Embedder-Policy-Report-Only
Cross-Origin-Opener-Policy-Report-Only
X-Server-W
X-RM-Cache-TTL
X-Trace-Id
X-Storage
X-AB
X-Vcl-Version
MS-CV
Charset
X-RTag
Ms-Operation-Id
X-Content-Powered-By
X-DataDome
NGB
Webserver
X-Dc
Cache
Filterid
X-Request-Bu
X-Request-Site
X-Request-Platform
Accept-Language
Refresh
X-Cache-Time
Paypal-Debug-Id
X-Cache-Hit
X-VC-Cache
X-Yandex-Req-Id
Onion-Location
X-Time
X-Ms-Request-Id
X-Ms-Version
X-B3-SpanId
X-Region
X-Real-IP
X-Node-Name
X-HITS
X-User-Agent
X-ECache
SRV
X-F-Cache
X-CCDN-CacheTTL
X-Hcs-Proxy-Type
X-CCDN-Origin-Time
CDN-RequestId
Priority
GEO-INFO
X-LB-Cache
X-Pass-Why
X-HTML-Minification-Powered-By
Liferay-Portal
Cross-Origin-Window-Policy
X-IPS-LoggedIn
Xet-Cookie
YJS-CacheStatus
X-Environment-Context
X-L-Path
X-Datadog-Sampled
X-Datadog-Sampling-Priority
X-Mode
X-Datadog-Parent-Id
X-Rocket-Nginx-Serving-Static
X-Datadog-Trace-Id
Backend
X-Fastcgi-Cache
X-Service
X-Whom
X-Cache-Expired-At
Country
Protected
X-Adobe-Source
X-Drupal-Cache-Tags
X-Tb
X-Rule
X-Handled-By
X-WP-CF-Super-Cache-Active
X-XRDS-Location
TWC-Locale-Group
X-Extlb
TWC-Connection-Speed
TWC-Device-Class
Property-Id
X-Geo-Region
X-FB-TRIP-ID
Selected-Fe
X-Browser-Name
Webcakes-Region
X-Cloudmap
Web-Mar-Node
ServerID
TWC-GeoIP-LatLong
TWC-GeoIP-Country
Url
TWC-GeoIP-Region
TWC-GeoIP-City
TWC-GeoIP-DMA
Webcakes-App-Version
Webcakes-App-Name
TWC-Privacy
Meta-Geo
X-Is-Supported-Browser
X-UPSTREAM-Address
X-Tncms
OT-Force-Account-Verify
X-Proxy-Build
X-Varnish-Beresp-Grace
X-Proxied
X-Timing-Wait
X-Tcp-Rtt
X-Servername
LB
X-SaId
X-Routing-Service
X-Rewrite-Enabled
X-Rn-Rsrv
X-Origin-Hint
AR-SID
X-JoinUs
X-Is-Mobile
X-Is-Modern-Browser
X-Vcache
X-Is-Tablet
X-Loop
X-Is-Desktop
X-Origin-Date
X-Wix-Request-Id
X-Zipkin-Id
X-Proxy-Cache-Info
X-Cdn-Origin
X-RCS-CacheZone
X-Cache-Action
X-Skip-Cache
Mn-Server-Ip
X-Origin-Cache
DB-Nickname
X-Web-Node
X-Tumblr-Pixel-3
X-Tumblr-Pixel-2
X-App-Environment
X-Httpd
Atl-Traceid
X-Soup
X-Detected-As
X-Forwarded-Host
X-Generation-Time
X-Redis-Cache
X-Fetched-On
X-Format
X-Hosted-By
X-Director
X-Logging-Id
ServedBy
X-Locale
X-Hit
Uber-Trace-Id
X-FW-Hash
X-FW-Dynamic
X-FW-Serve
X-Urbn-Site-Id
X-FW-Type
X-FW-Version
X-Provided-By
X-FW-Static
X-FW-Server
X-Urbn-Context-Path
X-ProxyCache-Key
X-SayCDN-TTL
X-Say-TTL
X-Say-Cacheable
X-Cluster
X-Served-From
X-Connection-Hash
X-Cms-Context
X-Cache-Host
X-BYPASS-REASON
X-Alternate-Cache-Key
X-ProxyCache-Status
X-RateLimit-Limit-Second
X-RateLimit-Remaining-Second
X-Edge-Location
X-Storefront-Renderer-Rendered
X-Scope-Id
X-Shopify-Stage
Expiry
Environment
Locale
X-Cacheable-TTL
X-VCT
X-Auth-Group-Type
Cache-Hits
X-PHP-Host
X-MP-GENERATED-AT
X-IPLB-Instance
X-IPLB-Request-ID
X-Labrador-Cache-Channel
X-S
X-Is-Mobile-Only
Filters
Fastcgi-Useragent
X-Debug-Info
X-Wormhole-Sdk
X-Origin
X-Cluster-Node
X-Drupal-Cache-Contexts
X-Endurance-Cache-Level
X-Restarts
X-VC
Apigw-Requestid
X-Cache-Debug
X-Server-ID
X-GEO
X-Mly-Id
X-R9-Blue-Green-Version
X-CDN-Forward
X-Platform
X-Sorting-Hat-ShopId
X-CDN-Cache-Status
X-Presslabs-Stats
X-Api-Version
X-No-Session
X-ShardId
X-NewRelic-App-Data
X-ShopId
X-Sorting-Hat-PodId
X-UA
Node
Front
Xserver
X-CLOUD-TRACE-CONTEXT
X-NF-Request-ID
X-Varnish-Cache-Hits
X-WP-CF-Super-Cache-Cookies-Bypass
X-Lagoon
WPO-Cache-Status
Cache-Tv-Group
X-Varnish-Age
X-Generated-By
X-Tt-Logid
X-SRV
Countrycode
X-Optimistic-Header
X-Varnish-Beresp-Ttl
X-NWS-UUID-VERIFY
X-B-Cache
X-Webstats-RespID
Referer-Policy
X-Signature
X-Fastly-Request-Id
X-B3-Traceid
X-Site-Version
From-Origin
X-CACHE-AGE
X-Client-Ip
X-Azure-Ref-OriginShield
Cache-Provider
X-Accel-Version
X-Ua
Request-ID
X-VC-TTL
Location
X-Cache-Operation
X-PHP-Backend
X-Cache-Rule
X-Worker
X-Auto-Login
X-VWS-Id
X-LJ-Flow-ID
X-Tx-Id
AMP-Access-Control-Allow-Source-Origin
X-AWS-Id
X-TA-CDN-Provider
Source
S-Rt
WPO-Cache-Message
X-IsAdmin
X-Litespeed-Cache-Control
X-Tb-Optimization-Total-Bytes-Saved
X-Sucuri-Cache
CF-IPCountry
X-Upstream-Ht
X-Xfnlog-Site
X-Air-Pt
X-Upstream-Ct
X-A-Wwc
X-Micro-Cache
X-Node-Id
Apple-News-Services-Host
X-Action
Apple-News-Services-Handled
X-Org
X-Origin-Expires
X-A-Dcw
X-A-Dgt
Origin-Agent-Cluster
X-Access
X-Aed
CDN-RequestCountryCode
Gh-Request-Id
X-Ig-Origin-Region
Ha-Gx-Prefs
X-HS-Content-Campaign-Id
Host-ID
Rendered-Blocks
Fl-Custom-Application
DCR-Processing-Time-Ms
DCR-Decision-By
X-Ig-Push-State
Expect-Staple
Fastly-SSL
Redirect-Candidate
IsBot
N-Cache
Meta-Geo-Continent
X-Hash
Odigeo-Trace-Id
Ngx.Var.Host
MD5-Digest
Powered-By
Pragrma
L5d-Success-Class
Lang
Log-Origin
X-GeoIP-City
Sslversion
Web-Mar-Region
X-GeoCode
Candidate-Md5Url
CDN-Cache
CDN-CachedAt
Wxu-Next-Commit
Wxu-Next-Hostname
X-A-Dam
Apple-News-Services-Request-Url
X-A-Ccd
X-A
Wxu-Next-Region
CDN-EdgeStorageId
CDN-PullZone
Time-Cloud-Cache
X-GeoCountry
Cluster
X-Loc
Store-Cloud-Cache
Cdnsip
Cdncip
CDN-RequestPullCode
X-AK-Request-ID
CDN-RequestPullSuccess
CDN-Uid
Apple-News-Services-Parsed-Url
X-Rojux
X-Varnish-Hostname
X-Depends
X-NGINX-Cache
X-Destination
X-Varnish-Director
X-Varnish-Beresp-Status
X-Developer
X-FC-Vary-Parameters
X-CUA
X-Contensis-Viewer-Groups
Xc-Version
X-Conf
X-Content-Age
X-External-Request-Id
X-Csrf-Jwt
X-Core-Value
X-Varnish-Authentication
X-V-Cache
X-SD-PageType
X-ScT
X-SIPLIST1
X-Section
X-Sigma-Backend
X-Eu-Site
X-Sigma
X-Slack-Backend
X-Slack-Shared-Secret-Outcome
X-Ee-Generated-By
X-Ec-GeoHdr
X-Ec-Fail
X-Ee-Origin
X-Ee-Request-Date
X-Ee-Request-Id
X-SRCache-Key
X-VG-WebCache
X-D
X-Policy
X-Rocket-Build-Number
X-Vtex-Remote-Cache
X-Cache-NE
X-PERF
Origin
X-Application
X-Save-Cache
X-VG-TLSProxy
X-Cache-Aspx
X-S-Cookie
X-B-Cookie
X-BCube-Filmed-By
X-Forwarded-Site
X-ApacheServer
X-CGP
X-Clientip
X-Cms-Device
X-PAYTM-SRV-ID
X-Vary-Devices
X-Bl-Debug
X-Bug-Bounty
X-Vdms-Version
X-Fastly-Backend
X-Ec-Custom-Error
X-Bip
X-Accel-Expires-Debug
Release
X-Gdpr
X-Epic-Correlation-Id
Origin-EX
Origin-CC
X-Akamai-Device-Characteristics
Origin-Site
X-Aicache-OS
X-From
X-App-Name
PFcat
X-Backend-Instance
RNT-Machine
X-Amz-Storage-Class
X-CacheTTL
X-Date
X-Debug-Cache-Fetch
X-Cache-Date
V-Age
Vix-Hermes-Req-Id
X-Generated-On
We-Hiring
X-Fmm-Version
X-Content-Length
X-Debug-Cache-Store
X-DefElseHash
RewriteTeamHook
RewriteTestHook
X-Dispatcher-Server
X-GeoIP-Country-Code
X-GeoIP-Region-Code
RNT-Time
Server-Host
Thinkindot-CacheControl-Type
Thinkindot-CacheControl
X-DefHash
TDXMobile
X-AB-Test
X-Men
X-Path
Nord-Request-ID
X-Op-Id-All
X-Proto
X-Pubstack
X-Request-URI
X-Req
X-Region-Sid
X-Old-Content-Length
X-Nyt-Route
Azure-SiteName
Azure-SlotName
Azure-Version
Azure-RegionName
Azure-InstanceId
X-NMSegId
X-Server-IP
X-Viewer-Country
X-Vmg-Version
X-Varnish-CookieHashed-On
X-Varnish-CookieINHashed-On
X-Mvc-Supplant-Cachable
X-Thinkindot-L3
X-Thinkindot-L1
X-Shield-Cache-Expires
X-Sn-Servicetimems
X-Thanos
X-GoCache-CacheStatus
X-Gamma-Serve
X-Varnish-Remaining-TTL
X-VarnishDD-TTL
X-Source
X-We-Are-Hiring
ServerName
X-Reqid
X-Bc-Bl
Cache-Contol
X-Origin-Time
X-Human
X-Jungle-Id
X-Internal-TTL
L
Content-Style-Type
Gannett-Cam-Experience-Id
Content-Script-Type
Machine
DSUID
X-Level-Front-Cache
Canary
NM-Fastcgi-Cache
X-Ion-Hop
X-HN
X-Ion-Healthy
Mail-Subject
X-LSADC-Cache
X-Parent-Response-Time
X-FORWARDED-FOR
Fastly-Backend-Name
Country-Code
X-Hnp-Log
Req-Svc-Chain
Fastly-GeoIP-CountryCode
X-SVT-ORM-VERSION
X-UA-Device-Type
X-Up
X-Edge-Server
Platform
X-Esi-Check
X-ND-Cache
X-Uri
X-DPWN-IS-SECURE
X-SVT-ORM-RULES
X-Mvc-Supplant-OutputCached
X-Vercel-Cache
X-Wikidot-Backend
Producers
X-Wikidot-Static-Cache
X-Gzip
X-Cache-Id
Cmsid
CacheControlHeader
X-Cs
Cmstype
X-Proxied-Request
X-Gen-Mode
Cdn-Request-Time
X-Acquia-Purge-Cdn-Unconfigured
X-Moov-Xdn-Caching-Status
X-Location
User-Cache-Control
X-Moov-Xdn-Version
X-Render-Time
X-SB
X-Vercel-Id
C-Via
X-Frame-Option
X-Via-Fastly
CDCHOST
X-BBC-Edge-Cache-Status
Sid
X-Block-Status
Cdn-Host
X-Moov-T
X-Sucuri-ID
X-ElasticPress-Query
Tube-Return
Click-Count-Error
X-B3-Trace-ID
Pics-Label
XM
X-Cache-FS-Status
X-Origin-Response-Time
Click-Count-Action-Start
Tube-Got-Results
Tube-Got-Eval
Tube-Get-Contents
X-Pad
Fastly-Drupal-HTML
CloudFront-Viewer-Country
NGX
Mime-Version
X-ZONE
Debug
X-Varnish-Hits
X-APP
X-Refresh
X-Cached-By
X-Via-Popv
Cookie
X-Via-Popn
X-Via-Poph
X-TT-LOGID
GeoIp-Country-Code
GeoIP-Latitude
Load-Balancing
X-Debug-Service
X-Datadome
X-Nginx-Cache-Key
X-DynaTrace-JS-Agent
HA-Ipaddr
X-TH-Server
X-Litespeed-Tag
X-Servedbyhost
X-Nananana
X-HA-Backend
Product
True-Client-Country-4JS
Sever-Int
Server-Ext
X-AIR-PT
X-Srv
X-Amz-Meta-Cb-Modifiedtime
Server-ID
Server-Hostname
X-Webkit-CSP
X-Cache-VC
X-GeoIP
Show-Do-Not-Sell-Link
Traceparent
X-Zone
X-User
X-Wa
Edge-Cache
WZWS-RAY
X-Nc
DataCenter
Cdn
X-B3-Parentspanid
X-Cache-Backend
Fastly-Drupal-Html
X-Fpc
X-Newrelic-Synthetics
X-Cdn-Forward
X-Ez-Minify-Html
HostName
X-Unity-Cache
X-LB-ID
MIME-Version
SID
X-B3-Spanid
X-RateLimit-Limit
X-Vc
X-Request-Start
Tcn
Resin-Trace
Akamai-Mon-Iucid-Del
X-LB-NoCache
X-Lsadc-Cache
X-VCL-Version
X-CDN-Provider
Wsr-Cache
X-Scheme
Lb
X-AC
X-Nginx-Cache
Xkeylog
XkeyR9
Xkey-La3
Sm-Log-Id
Serverhost
X-Service-Response-Time
Yjs-Id
X-Proxy-CacheR9
X-Proxy-Cache-La3
Surrogated-Key
X-TX-ID
X-Pool
X-HOST
X-Datacenter
A
CountryCode
Cs
X-HubSpot-Correlation-Id
X-NodeID
X-Request-Host
X-CS
NtCoent-Length
X-LiteSpeed-Tag
CDN
X-Lb-Id
Hostname
X-RequestId
X-API-Version
X-Air-Hostname
X-Vgn-Hpd-Reason
X-Akamai-Pragma-Client-IP
Uri
X-Cache-Grace
X-Air-Source
X-WA
Datacenter
Esi-Enabled
X-LiteSpeed-Cache-Control
Cdn-Requestid
X-FPC
X-Air-Trace-Id
X-Udemy-Cache-App-Namespace
X-Dynatrace-Js-Agent
X-Fastly-Backend-Reqs
X-DataCenter
X-NC
X-VC-Age
X-DynaTrace
N1-Cache
Yak-Timeinfo
X-ID
Server-Id
Edge-Copy-Time
X-Styx-Info
X-HA-Device-Type
X-Via-SSL
X-Html-Minification-Powered-By
Pramga
Cr
X-Styx-Origin-Id
X-HA-Application-Name
X-Via-CDN
X-HA-Bot-Classification
X-Stale
X-Via-JSL
X-Via-Edge
Srv
X-Varnish-Beresp-TTL
ServerHost
GeoIP-Country-Code
T-Server
X-Geolocation
Req-ID
X-Zen-Fury
X-Srcache-Store-Status
X-Srcache-Fetch-Status
X-Ez-Minify-Js
RATING
X-TIM-N
X-Var-Ttl
X-Jobs
Proxy-Firewall
X-TimeS
Geoip-Latitude
Content-Secure-Policy
WP-Super-Cache
True-Client-IP
X-Lb-Nocache
W
X-Swift-Error
X-Ha-Backend
X-ServedByHost
From-Cache
X-Oracle-DMS-ECID
X-MSEdge-Features
Cloudfront-Viewer-Country
X-MSEdge-Flight
X-App
On-Server
X-CSRF-TOKEN
X-Cdn-Srv
X-CACHE-KEY
X-Wp-Cf-Super-Cache-Cache-Control
X-LAGOON
X-Wp-Cf-Super-Cache
X-Proxy-Cache-LA2
X-Ramcache
X-Ssense-Gql
X-Ssense-Shipping-Surcharge-Enabled
X-Via-PopN
FSS-Cache
X-Via-PopV
X-Via-PopH
X-Correlation-ID
X-VTEX-Cache-Time
X-Powered-By-VTEX-Cache
X-VTEX-Cache-Server
X-Wp-Cf-Super-Cache-Cookies-Bypass
X-Wp-Cf-Super-Cache-Active
X-Webkit-Csp-Report-Only
X-Sorting-Hat-Shopid
X-Elasticpress-Query
X-Shopid
X-Shardid
X-Geo
X-Key
X-VServer
Ohc-File-Size
Ohc-Cache-HIT
X-Cdn-Cache-Status
Cl-Cache
CF-Cached-On
X-Sorting-Hat-Podid
X-Sucuri-Id
X-Web-Server
X-Check-Cacheable
X-Fastly-Cache
Ngx
X-ByteArk-ReqID
X-ByteArk-Cache
X-Th-Server
Coldstone-Viewer-Country-Region-Name
Coldstone-Viewer-Country
X-Serial
X-PageType
Akamai-X-True-TTL
X-DC
Coldstone-Viewer-Currency
X-ATG-Version
WebServer
X-WA-Info
Cf-Ipcountry
X-MiniProfiler-Ids
Warning
My-App
X-Iplb-Request-Id
X-Limited
X-Beacon
X-Iplb-Instance
Host-Name
X-Request-Url
Cneonction
X-Mg-Cache
X-Env
User-Agent
FSS-Proxy
X-Fastly-Cache-Status
Xkey-G-Jp