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