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