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