Threat Level: green Handler on Duty: Brad Duncan

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