Threat Level: green Handler on Duty: Didier Stevens

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
CF-RAY
Expect-CT
Accept-Ranges
X-XSS-Protection
Pragma
X-Powered-By
X-Cache
Via
Age
Content-Security-Policy
Report-To
NEL
Alt-Svc
Referrer-Policy
Access-Control-Allow-Origin
Content-Language
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-Xss-Protection
X-Cache-Hits
P3P
X-UA-Compatible
X-Served-By
X-Download-Options
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Request-Id
X-Varnish
X-Adblock-Key
X-Permitted-Cross-Domain-Policies
Access-Control-Allow-Credentials
Accept-CH
X-AspNet-Version
Content-Security-Policy-Report-Only
X-Runtime
Accept-CH-Lifetime
X-DNS-Prefetch-Control
X-Drupal-Cache
X-Check
X-Cache-Status
X-Generator
X-Ua-Compatible
Server-Timing
X-Request-ID
X-Cacheable
X-Envoy-Upstream-Service-Time
Timing-Allow-Origin
X-FRAME-OPTIONS
X-Iinfo
X-Drupal-Dynamic-Cache
X-Content-Security-Policy
Access-Control-Expose-Headers
Feature-Policy
X-CDN
Content-Encoding
Status
Upgrade
X-AspNetMvc-Version
CF-Ray
Access-Control-Max-Age
X-Amz-Request-Id
X-Via
X-Amz-Id-2
Cf-Edge-Cache
Host-Header
EagleId
Keep-Alive
Request-Context
X-Backend
X-Cache-Group
X-UA-Device
X-AH-Environment
X-Robots-Tag
X-Server
X-Hacker
Permissions-Policy
X-Turbo-Charged-By
X-Proxy-Cache
Xkey
X-Ws-Request-Id
X-Rq
X-Age
X-Vhost
X-Amz-Version-Id
X-Dispatcher
Cf-Apo-Via
X-Dns-Prefetch-Control
Allow
X-Swift-SaveTime
X-Swift-CacheTime
X-LiteSpeed-Cache
X-Server-Powered-By
Grace
Ali-Swift-Global-Savetime
X-Varnish-Cache
P3p
X-Page-Speed
X-Pingback
X-Styx-Req-Id
X-Pantheon-Styx-Hostname
X-Cache-Lookup
X-OneAgent-JS-Injection
X-Device
Cf-Railgun
X-Backend-Server
EagleEye-TraceId
X-Host
X-WebKit-CSP
X-Server-Id
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-Response-Time
X-Readtime
X-Akam-SW-Version
Surrogate-Control
X-HW
Request-Id
X-Cloud-Trace-Context
X-Ruxit-JS-Agent
X-Node
Content-Location
X-Application-Context
X-Nginx-Upstream-Cache-Status
X-Nginx-Cache-Status
X-NWS-LOG-UUID
X-Country
Service-Worker-Allowed
X-Country-Code
X-CST
X-Content-Type
X-Clacks-Overhead
X-Trace
Cache-Tag
X-Url
Rating
X-Litespeed-Cache
X-Rack-Cache
X-Amz-Server-Side-Encryption
X-FTR-Request-ID
X-Times
X-Vname
X-TtlSet
X-PC
Nginx-Cache
X-Daa-Tunnel
Cross-Origin-Opener-Policy
X-Oneagent-Js-Injection
X-Server-Name
X-Browser-Type
X-Mcache
X-Edge
X-Webkit-Csp
X-Midtier
X-Powered-By-Plesk
X-ESI
X-Cnection
X-ECACHE
Edge-Control
X-Element-Page-Cache
X-D2id
X-GitHub-Request-Id
X-Upstream
Verso
X-MS-InvokeApp
X-Ac
AR-Request-ID
AR-SID
AR-ATIME
AR-PoweredBy
X-Kinja-Build
X-Kinja
X-GoogleNews-Bot
X-Exp-Id
X-Cdn-Fetch
X-Exp-Variant
X-Kinja-Revision
X-Kinja-Server
X-B3-TraceId
X-Cache-TTL
Accept-Ch-Lifetime
X-Vcap-Request-Id
X-Ser
X-FastCGI-Cache
X-Abt-Application-Version
X-Navigation-Version
AR-CACHE
X-Dw-Request-Base-Id
SPIisLatency
SPRequestDuration
X-Mod-Pagespeed
SPRequestGuid
X-SharePointHealthScore
X-NF-Request-ID
X-Amz-Rid
Fastly-Restarts
X-Kraken-Loop-Name
X-Server-Lifecycle-Phase
X-Instrumentation
X-Erf-Bev-Bev-Is-Generated
X-Erf-Bev-Bev
X-Client-IP
X-Middleton-Display
X-Sol
Pagespeed
Display
X-Aws-Lambda-Call-Status
X-Mg-S
Edge-Cache-Tag
X-Kinsta-Cache
X-Edge-Location-Klb
S
X-Ruxit-Js-Agent
X-Powered-CMS
X-Goog-Hash
X-Middleton-Response
Response
Cache-Status
Access-Control-Request-Method
X-Version
X-Amzn-Trace-Id
X-VARITI-CCR
X-ARC
X-Fastly-Request-ID
X-Cache-Key
RTSS
X-Ratelimit-Limit
X-Content-Digest
X-TraceId
Cross-Origin-Resource-Policy
X-Forwarded-For
X-T
X-Recruiting
Realpath
X-RateLimit-Remaining
X-PDP-UNCACHING-HASH
X-Correlation-Id
X-Ratelimit-Remaining
X-Server-ID
Front-End-Https
X-MSEdge-Ref
Fastcgi-Cache
X-Cached
X-Varnish-TTL
MS-Author-Via
Content-MD5
X-TTL
X-HS-Cache-Config
X-HS-Hub-Id
X-HS-Content-Id
X-Ua-Browser
X-FTR-Cache-Status
X-FTR-Backend
X-FTR-Backend-Server
X-FTR-Balancer
X-Country-Code-Real
X-Request-Received
X-Request-Processing-Time
MicrosoftSharePointTeamServices
Server-Node
X-Shield-Request-Id
X-Protected-By
Public-Key-Pins
Payment
X-HS-Combine-CSS
TP-Cache
X-Frontend
X-Forwarded-Proto
Pinterest-Version
X-SRCache-Fetch-Status
X-SRCache-Store-Status
X-Pinterest-Rid
Pinterest-Generated-By
X-LLID
Arr-Disable-Session-Affinity
X-FTR-Expires
X-Distributor
X-Jurisdiction
X-HP-Webp
X-HP-Trace-Id
X-ORACLE-DMS-RID
X-Accel-Expires
X-Kong-Proxy-Latency
X-Kong-Upstream-Latency
Count-Hit
X-GUploader-UploadID
X-Ttl
X-Origin-Server
X-LB-Cache
X-NODE
X-Ezoic-Cdn
X-Request-Handler-Origin-Region
X-Microsite
X-PressLabs-Stats
X-Content-Security-Policy-Report-Only
Host
X-Az
X-Activity-Id
X-TEC-API-VERSION
X-TEC-API-ORIGIN
X-TEC-API-ROOT
X-AppVersion
X-Varnish-Backend
X-Cluster-Name
X-Varnish-Server
X-Www-Served-By
Cache-Tags
MRF-Tech
Mrf-Cache-Status
X-App-Server
X-B3-TraceId-Primal
Retry-After
Accept-Charset
X-Amz-Meta-S3cmd-Attrs
X-Ua-Device
Server-Name
X-Newrelic-App-Data
Cleartype
X-Hostname
X-CSRF-Token
X-Goog-Metageneration
X-Envoy-Decorator-Operation
X-Hits
X-Origin-Cache-Key
X-ORACLE-DMS-ECID
X-Geo-Country
X-NGENIX-Cache
Referer-Policy
X-Git-Hash
Filterid
X-Upgrade-Enabled
TP-L2-Cache
X-Azure-Ref
X-Seen-By
X-DIS-Request-ID
Access-Control-Allow-Method
X-Unique-Id
TCN
X-Load-Cache
X-Tt-Trace-Tag
X-Tt-Trace-Host
X-F-Cache
X-Proxy
X-Request-Guid
X-Grace
X-Hcs-Proxy-Type
X-CCDN-Origin-Time
X-CCDN-CacheTTL
Section-Io-Cache
X-Revision
X-Trace-Id
X-Logged-In
X-Cache-Control
X-B
X-B3-Sampled
X-Type
X-Amzn-RequestId
X-TT
X-Amz-Apigw-Id
X-Contextid
Healthy
X-Debug
DC
X-Debug-Info
X-Fb-Rlafr
X-FB-Debug
X-Px
X-Varnish-Ttl
X-Page-Id
Paypal-Debug-Id
X-Id
X-N
X-Mobile
Viewport
X-Oracle-Dms-Ecid
X-WP-CF-Super-Cache-Cache-Control
X-WP-CF-Super-Cache
X-Goog-Storage-Class
X-Goog-Stored-Content-Encoding
Fastly-SIE
Fastly-SWR
X-Goog-Generation
X-Goog-Stored-Content-Length
X-Whom
X-XRDS-LOCATION
X-Time
X-Oracle-Dms-Rid
X-Datadog-Sampling-Priority
X-Datadog-Trace-Id
Content-Disposition
X-Via-JSL
X-Content-Options
X-Datadog-Parent-Id
Charset
Version
X-Template
X-Webkit-CSP
X-Varnish-Grace
X-Origin-Cache
X-Wix-Request-Id
X-Magnolia-Registration
X-Cache-Grace
Surrogate-Key
X-Rid
X-RateLimit-Limit
X-B3-SpanId
X-App-Environment
X-Signature
X-B-Cache
SRV
VIX-Pulpo-Node
VIX-Pulpo-Upstream-Status
X-Tumblr-Pixel-0
X-Tumblr-Pixel-1
X-RemovedCookies
X-Tumblr-User
X-ProcessESI
X-Rule
X-EdgeConnect-Cache-Status
X-Tumblr-Pixel
X-Datadog-Sampled
X-Debug-IsPreview
X-G
SD-X-WS
X-Node-Name
X-Debug-IsConnected
X-Yottaa-Optimizations
X-UUID
X-Yottaa-Metrics
X-FW-Static
X-Hl-Ver
X-Adobe-Content
X-FW-Server
X-FW-Version
X-Language
X-Backend-Name
ServerID
X-Adobe-Loc
Ms-Operation-Id
MS-CV
X-Amz-Replication-Status
X-FW-Type
X-Instance
X-FW-Dynamic
X-FW-Hash
X-FW-Serve
X-RTag
X-Is-Bot
X-Storage
X-NYM-Debug-Backend
X-Rendered-As
X-Device-Type
NGB
GEO-INFO
X-Status
X-Region
X-Cacheable-TTL
X-IPS-LoggedIn
Country
X-Cache-Hit
X-Amzn-Remapped-Content-Length
X-Proxy-Cache-Info
X-User-Agent
X-L-Path
X-Environment-Context
Liferay-Portal
Countrycode
X-Real-IP
X-Source
X-NWS-UUID-VERIFY
X-ServerID
X-Cache-Age
X-WP-CF-Super-Cache-Active
Cross-Origin-Window-Policy
X-Sucuri-Cache
Akamai-GRN
X-Sucuri-ID
X-RateLimit-Reset
Amp-Access-Control-Allow-Source-Origin
OT-Force-Account-Verify
X-Servername
X-RM-Cache-TTL
X-UA
X-VC-Cache
From-Origin
Front
X-Framework
X-Air-Pt
Backend
X-WebKit-CSP-Report-Only
X-Wormhole-Sdk
Upgrade-Insecure-Requests
X-INCAP-ABP
X-Mode
X-AB
X-Air-Trace-Id
X-Air-Source
X-Air-Hostname
X-Akamai-Request-ID2
X-Content-Powered-By
X-Cache-Time
Xet-Cookie
Refresh
X-Xrds-Location
X-Handled-By
X-URL
X-Edge-Location
X-DataDome
X-Nginx-Cache
X-Xfnlog-Site
X-Rn-Rsrv
X-Origin-CC
X-Origin-TTL
X-Endurance-Cache-Level
X-JoinUs
X-SRV
Url
X-HTML-Minification-Powered-By
X-Rewrite-Enabled
Meta-Geo
Accept-Language
X-UPSTREAM-Address
X-SaId
Filters
Cache
X-Cache-Rule
X-Cache-Operation
X-Origin-Date
X-PHP-Host
X-AWS-Id
X-Akamai-Edgescape
X-Provided-By
X-Cluster
X-No-Session
X-LJ-Flow-ID
X-Git-Commit
X-CDN-Forward
X-Container-Uri
X-Labrador-Cache-Channel
X-Reqid
X-Vcache
X-Webstats-RespID
ServedBy
X-Tumblr-Pixel-2
X-VWS-Id
X-Varnish-Cache-Hits
X-Web-Node
X-Zipkin-Id
X-Logging-Id
X-Origin-Hint
WPO-Cache-Message
X-Scope-Id
X-Restarts
X-Redis-Cache
X-R9-Blue-Green-Version
WPO-Cache-Status
X-Proxied
X-Routing-Service
X-Extlb
TWC-GeoIP-Country
TWC-GeoIP-LatLong
TWC-Locale-Group
TWC-Privacy
TWC-Device-Class
TWC-Connection-Speed
Cache-Hits
Mn-Server-Ip
Property-Id
Section-Io-Id
Web-Mar-Node
Webcakes-App-Name
X-Cloudmap
X-Cms-Context
X-Hosted-By
X-IPLB-Instance
X-Cache-Debug
X-Adobe-Source
Webcakes-App-Version
Webcakes-Region
X-Accel-Version
X-IPLB-Request-ID
Atl-Traceid
X-XRDS-Location
Frame-Options
Webserver
X-Forwarded-Host
X-Format
X-Frame-Option
X-Loop
X-Lambda-Id
X-Fetched-On
X-BYPASS-REASON
Access-Control-Request-Headers
X-Ratelimit-Reset
X-Director
X-Drupal-Cache-Tags
X-Ms-Request-Id
X-ProxyCache-Key
X-Tncms
X-Skip-Cache
X-Upstream-Ct
X-Upstream-Ht
X-VCT
X-Varnish-Age
X-Served-From
X-SayCDN-TTL
X-ProxyCache-Status
Apigw-Requestid
X-RCS-CacheZone
X-Say-Cacheable
X-Say-TTL
X-Ms-Version
X-Tb
X-Azure-Ref-OriginShield
X-VC
X-Httpd
X-GeoCountry
X-GeoCode
X-Is-Mobile
X-Is-Tablet
X-Is-Supported-Browser
X-Geo-Region
X-Is-Desktop
X-Generation-Time
X-Browser-Name
X-Alternate-Cache-Key
Thinkindot-Control
X-Cache-Host
X-CMSURLCustom
X-Drupal-Cache-Contexts
X-Detected-As
X-Origin
X-S
X-Varnish-Beresp-Grace
X-Timing-Wait
X-Thinkindot-L3
Xserver
X-Locale
X-Generated-By
X-Site-Version
X-Tcp-Rtt
X-Storefront-Renderer-Rendered
X-Shield-Cache-Expires
X-ShardId
Thinkindot-CacheControl-Type
X-ShopId
X-Shopify-Stage
X-Soup
X-Sorting-Hat-ShopId
X-Proxy-Build
X-Sorting-Hat-PodId
Thinkindot-CacheControl
TDXMobile
Selected-Fe
X-Cache-Status-Check
X-Cdn-Origin
X-Buckets
LB
X-RID
X-Lagoon
X-Optimistic-Header
X-Request-URI
X-Worker
X-Rocket-Nginx-Serving-Static
Fastcgi-Useragent
Source
X-Vercel-Cache
X-Vercel-Id
X-WP-CF-Super-Cache-Cookies-Bypass
Azure-SlotName
Azure-InstanceId
Azure-SiteName
Azure-Version
X-ID
Azure-RegionName
Protected
Node
X-Pass-Why
X-Vcl-Version
Onion-Location
CDN-Cache
CDN-CachedAt
CDN-RequestCountryCode
CDN-Uid
CDN-RequestPullSuccess
CDN-RequestPullCode
CDN-EdgeStorageId
CDN-PullZone
X-TA-CDN-Provider
X-App-Version
X-GEO
X-Api-Version
X-Fastcgi-Cache
X-Connection-Hash
Expiry
X-Cache-Expired-At
Cross-Origin-Embedder-Policy
X-Tumblr-Pixel-3
X-Tec-Api-Root
X-Tec-Api-Version
X-Tec-Api-Origin
X-Ismobilevalue
X-PHP-Backend
X-Cache-Server
Alternate-Protocol
Environment
AMP-Access-Control-Allow-Source-Origin
X-Server-W
X-Proxy-Cache-Status
Cdn-Requestid
X-Tt-Logid
Uber-Trace-Id
CF-IPCountry
X-Cache-Action
Priority
DB-Nickname
X-DC
X-Cluster-Node
CDN-RequestId
X-Fastly-Request-Id
Locale
X-Urbn-Context-Path
X-Urbn-Site-Id
X-Erf-Stays-Pdp-Viaduct-Migration-Web-V2
X-Jobs
User-Cache-Control
X-Mg-Request-UUID
Sid
X-B3-Traceid
X-Tx-Id
Cache-Tv-Group
HostName
X-MP-GENERATED-AT
Fusion-Content-Source
Fusion-Template-Id
X-LSADC-Cache
Fusion-Deployment-Id
Fusion-Source
Fusion-Component-Id
Fusion-Content-Id
X-Bl-Debug
Surrogated-Key
X-GeoIP-City
Lang
X-Cache-Id
X-Gen-Mode
X-BCube-Filmed-By
X-Block-Status
X-TIM-N
X-Hnp-Log
MD5-Digest
Meta-Geo-Continent
X-Ig-Push-State
X-Ig-Origin-Region
X-Bc-Bl
X-Aed
X-Gzip
X-Cache-NE
Magicmarker
X-Conf
X-Ec-Fail
Origin
X-Dispatcher-Server
X-Ec-GeoHdr
X-Epic-Correlation-Id
Origin-Agent-Cluster
A
X-Esi-Check
Candidate-Md5Url
X-Developer
X-FB-TRIP-ID
Edge-Cache
Ngx.Var.Host
DCR-Processing-Time-Ms
DCR-Decision-By
X-D
Content-Secure-Policy
X-Content-Age
Gannett-Cam-Experience-Id
X-Jungle-Id
Vix-Hermes-Req-Id
X-A-Dcw
X-A-Dgt
T-Server
X-A-Wwc
X-VTEX-Cache-Time
X-A
Rendered-Blocks
X-A-Dam
X-ScT
X-A-Ccd
X-ND-Cache
X-Rojux
X-Powered-By-VTEX-Cache
Server-Host
X-Varnish-Hostname
X-Vdms-Version
X-Varnish-Beresp-Ttl
X-Viewer-Country
X-SRCache-Key
Sslversion
X-UA-Device-Type
X-Vtex-Remote-Cache
X-SB
X-VTEX-Cache-Server
X-Origin-Expires
X-Origin-Response-Time
X-Auth-Group-Type
X-Client-Ip
X-Nf-Request-Id
X-Varnish-Director
Cdnsip
C-Via
X-PAYTM-SRV-ID
Cdn-Request-Time
CDCHOST
X-Debug-Cache-Store
X-Device-Os
Cdn-Host
Cdncip
Cache-Provider
X-AK-Request-ID
X-Proto
Host-ID
X-Auto-Login
X-Cache-Bucket
X-Cache-Info
X-RateLimit-Limit-Second
X-Backend-Instance
X-Request-Start
X-Req
X-Via-Fastly
X-RateLimit-Remaining-Second
Fastly-SSL
X-Cache-TTL-Remaining
X-Policy
X-Core-Value
X-App-Name
X-Platform
NM-Fastcgi-Cache
Server-Ext
Fastly-Backend-Name
X-Cdn-Srv
X-Pubstack
X-Clientip
X-Debug-Cache-Fetch
X-Op-Id-All
X-GeoIP
X-GeoIP-Country-Code
X-Mvc-Supplant-Cachable
Odigeo-Trace-Id
X-Geo-Header
X-SD-PageType
X-NCache
X-Edge-Server
X-Generated-On
X-GeoIP-Region-Code
X-Vdms-Path
X-Level-Front-Cache
X-Tb-Optimization-Total-Bytes-Saved
Ssr
X-Loc
X-Test
Powered-By
Wxu-Next-Commit
Sever-Int
X-HS-Content-Campaign-Id
X-Gdpr
X-VG-WebCache
X-Node-Id
Origin-CC
Wxu-Next-Region
X-FC-Vary-Parameters
Wxu-Next-Hostname
X-Nyt-Route
X-Origin-Time
Server-Hostname
X-Org
X-NMSegId
Origin-EX
Req-ID
X-Fmm-Version
XM
X-Forwarded-Site
X-Service
X-Acquia-Purge-Cdn-Unconfigured
X-Aicache-OS
W
X-Access
X-Amz-Storage-Class
X-Ad-Load-Variation
X-BBC-Edge-Cache-Status
X-B3-Trace-ID
Web-Mar-Region
We-Hiring
V-Age
X-Micro-Cache
X-NodeID
X-Proxied-Request
X-Request-Time
X-Scheme
X-WA-Info
X-We-Are-Hiring
X-Nginx-Cache-Key
X-Wikidot-Static-Cache
X-Wikidot-Backend
X-Section
X-Sn-Servicetimems
X-Varnish-Authentication
X-Varnish-Beresp-Status
X-VarnishDD-TTL
X-VG-TLSProxy
X-Var-Ttl
X-V-Cache
X-SVT-ORM-RULES
X-SVT-ORM-VERSION
X-Thanos
Tube-Return
Yak-Timeinfo
X-CUA
X-DPWN-IS-SECURE
X-Ec-Custom-Error
X-Eu-Site
X-Csrf-Jwt
X-Contensis-Viewer-Groups
X-Cache-Aspx
X-Cache-Backend
X-CGP
X-Fastly-Backend
X-Fastly-Cache
X-Custom-Header
X-Mly-Id
X-Mvc-Supplant-OutputCached
X-Men
X-Human
X-From
X-GoCache-CacheStatus
X-HN
X-Bip
Redirect-Candidate
DSUID
Esi-Enabled
Country-Code
Content-Style-Type
Cluster
Content-Script-Type
Fastly-GeoIP-CountryCode
Gh-Request-Id
L
L5d-Success-Class
Is-Eu
HA-Ipaddr
Ha-Gx-Prefs
Click-Count-Error
Click-Count-Action-Start
X-ECache
X-Uri
X-HITS
X-Original-Request-Id
X-Response-Served-From
X-Zone
Adler-Geo
Apple-News-Services-Parsed-Url
Apple-News-Services-Request-Url
Apple-News-Services-Host
Apple-News-Services-Handled
AKAMAI
Mail-Subject
X-Newrelic-Synthetics
Tube-Got-Results
Tube-Got-Eval
Platform
RNT-Machine
On-Server
Release
Producers
Tube-Get-Contents
PFcat
RNT-Time
Req-Svc-Chain
True-Client-Country-4JS
Proxy-Firewall
X-Pool
X-Accel-Expires-Debug
X-Region-Sid
Pramga
X-Location
X-Date
X-Request-Host
X-Slack-Backend
Cache-Key
X-Hash
X-Up
X-Varnishpool
X-LiteSpeed-Cache-Control
Canary
Machine
NGX
X-Server-IP
X-CacheTTL
X-Slack-Shared-Secret-Outcome
X-AIR-PT
X-TT-LOGID
SID
WP-Super-Cache
X-ApacheServer
X-Varnish-Remaining-TTL
X-DefHash
X-Render-Time
X-Varnish-CookieHashed-On
X-Varnish-CookieINHashed-On
X-DefElseHash
X-Varnish-Hits
X-NGINX-Cache
X-PERF
Mime-Version
X-Pad
X-LB-ID
X-Refresh
X-Dc
Debug
X-Depends
Fastly-Drupal-HTML
X-Cs
X-Nananana
X-COUNTRY
X-Via-Popn
X-Via-Poph
X-HA-Backend
X-CACHE-GROUP
X-Via-Popv
CloudFront-Viewer-Country
Pics-Label
X-CACHE-AGE
X-Akamai-Transformed
X-Cache-FS-Status
X-Servedbyhost
X-Parent-Response-Time
Datacenter
GeoIP-Latitude
Locid
X-VHOST
X-M-Reqid
X-LB-NoCache
X-Datadome
X-VC-TTL
X-Amz-Meta-Cb-Modifiedtime
X-M-Log
X-Platform-Router
X-B3-Parentspanid
X-Platform-Processor
X-Platform-Cluster
Server-Info
X-Cached-By
X-Old-Content-Length
Server-ID
BehaviorPad-Version
Ngx-Var-Key
X-TIME
X-Litespeed-Tag
X-CS
X-Nc
X-Wa
Resin-Trace
X-CDN-Cache-Status
X-LiteSpeed-Tag
X-APP
Cdn
Fastly-Drupal-Html
Cf-Ipcountry
X-DynaTrace-JS-Agent
X-Presslabs-Stats
X-TH-Server
X-Moov-T
GeoIp-Country-Code
X-Moov-Xdn-Version
Cross-Origin-Embedder-Policy-Report-Only
NtCoent-Length
X-Fpc
X-IAuth-Set-Uid
X-Content-Length
X-Vgn-Hpd-Reason
X-VCache
FSS-Cache
X-Vc
X-ZONE
X-NewRelic-App-Data
Uri
Cf-Device-Type
X-User
Serverhost
X-External-Request-Id
X-Destination
X-Esi
X-Application
True-Client-Ip
X-S-Cookie
True-Client-IP
X-B-Cookie
X-Dynatrace-Js-Agent
CDN
X-HostName
X-SERVER-NAME
X-TX-ID
X-Dispatcher-Number
X-Varnish-Beresp-TTL
X-Srv
X-Zen-Fury
Vc-Max-Age
X-RequestId
GeoIP-Country-Code
X-Sigma-Backend
X-Rocket-Build-Number
Tcn
X-Instance-Name
X-Cache-Date
S-Rt
X-Sigma
X-Oracle-DMS-ECID
Product
X-HOST
Srv
X-Cdn-Cache-Status
X-API-Version
X-VServer
Load-Balancing
Request-ID
X-NC
X-Dispatch
X-Branch-Name
X-FPC
X-WA
X-DynaTrace
Hostname
X-Segment-20210421
X-CACHE-KEY
X-Aspnet-Duration-Ms
X-Webkit-Csp-Report-Only
X-Route-Name
X-Cdn-Forward
X-Flags
X-Is-Crawler
X-Providence-Cookie
X-Ckpd-Fst-Backend
X-B3-Spanid
X-APP-VERSION
Ohc-File-Size
Server-Id
X-DataCenter
X-FL-QIT-DEBUG
Srvid
X-Bug-Bounty
ServerName
Geoip-Latitude
X-Page-View
CacheControlHeader
X-Lb-Nocache
Type
X-Geo
X-Irp-Debug
DataCenter
X-ServedByHost
X-Sql-Count
X-Http-Reason
X-Sql-Duration-Ms
X-Nf-Country
X-Nf-Language
X-VCL-Version
X-Nf-Ats-Version
X-HubSpot-Correlation-Id
Origin-Trial
Cloudfront-Viewer-Country
Cl-Cache
Epwk-X-Cache
X-Cache-Ttl
X-Correlation-ID
Edge-Copy-Time
Ohc-Cache-HIT
X-Via-CDN
X-App
IsBot
User-Agent
X-Akamai-Device-Characteristics
X-Via-Edge
X-Owner
X-Via-SSL
X-Via-PopH
X-Via-PopN
X-Ha-Backend
X-Ua
Cross-Origin-Opener-Policy-Report-Only
PICS-Label
X-Via-PopV
Cneonction
X-SIPLIST1
X-Srcache-Store-Status
X-Srcache-Fetch-Status
Rtss
MIME-Version
XkeyRZ
Cmstype
Cmsid
X-Lb-Id
X-Vmg-Version
X-Core-Mission
ServerHost
X-Proxy-CacheRZ
X-MiniProfiler-Ids
WZWS-RAY
X-Info
Lb
X-Service-Response-Time
X-Acquia-Application-UUID
X-Acquia-Purge-Tags
N-Cache
X-Acquia-Site
X-Acquia-Application-Trace
X-Sqd-Ctime
Sm-Log-Id
X-Sqd-Stime
Xc-Version
Warning
X-Fastly-Country-Code
X-Qloud-Router
X-Limited
X-Web-Server
X-MSEdge-Features
X-MSEdge-Flight
X-Datacenter
X-Gamma-Serve
X-Litespeed-Cache-Control
X-LAGOON
Servername
X-Hit
CountryCode
X-IN-APIGATEWAYSSL
X-IN-APIGATEWAY
X-Amz-Meta-Opti
X-Check-Cacheable
X-Serial
X-RAMCache
X-Akamai-Pragma-Client-IP
X-Requestid
X-Th-Server
X-Ramcache
X-Amz-Meta-Sha256
X-Udemy-Cache-App-Namespace
X-Amz-Meta-S3b-Last-Modified
Ngx
X-Snapshot-Date
X-Dw-Trace-Id