Threat Level: green Handler on Duty: Jan Kopriva

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
Content-Length
X-Frame-Options
Strict-Transport-Security
X-Content-Type-Options
Accept-Ranges
Last-Modified
CF-Cache-Status
Pragma
Link
CF-RAY
X-Powered-By
ETag
Expect-CT
X-XSS-Protection
Via
X-Cache
Age
Content-Security-Policy
Access-Control-Allow-Origin
Content-Language
P3P
X-UA-Compatible
X-Cache-Hits
X-Amz-Cf-Pop
X-Amz-Cf-Id
Referrer-Policy
X-Served-By
X-Xss-Protection
X-Varnish
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
Alt-Svc
X-Download-Options
X-Request-Id
X-AspNet-Version
Access-Control-Allow-Credentials
X-Runtime
X-FRAME-OPTIONS
X-Drupal-Cache
X-Adblock-Key
X-Request-ID
X-Check
X-Generator
Content-Security-Policy-Report-Only
X-Cache-Status
X-Permitted-Cross-Domain-Policies
X-Cacheable
X-DNS-Prefetch-Control
Timing-Allow-Origin
X-Iinfo
X-Template
X-Language
X-AspNetMvc-Version
Status
X-Content-Security-Policy
X-Buckets
Content-Encoding
Access-Control-Expose-Headers
X-CDN
Upgrade
Xkey
Access-Control-Max-Age
Keep-Alive
X-Drupal-Dynamic-Cache
X-Kinja-Server-Push
X-Turbo-Charged-By
CF-Ray
X-AH-Environment
X-Via
X-Age
X-Cache-Group
X-Pass-Why
X-Backend
X-Ua-Compatible
X-Envoy-Upstream-Service-Time
EagleId
X-Server
X-Amz-Id-2
X-Amz-Request-Id
X-Robots-Tag
X-Page-Speed
X-Pingback
X-Server-Powered-By
X-UA-Device
X-Proxy-Cache
X-Swift-CacheTime
X-Swift-SaveTime
X-Hacker
X-Nginx-Cache-Status
Ali-Swift-Global-Savetime
Request-Context
X-Varnish-Cache
Grace
Server-Timing
Feature-Policy
Cf-Railgun
X-Amz-Version-Id
X-LiteSpeed-Cache
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Device
X-WebKit-CSP
X-Rq
X-Server-Id
Report-To
EagleEye-TraceId
X-Ac
X-Response-Time
X-OneAgent-JS-Injection
X-Host
Request-Id
X-Cnection
X-Backend-Server
X-Node
X-DataDome
X-Ws-Request-Id
Content-Location
X-Origin-Cache
X-Cache-Lookup
X-Cloud-Trace-Context
X-Readtime
NEL
X-Dns-Prefetch-Control
X-Vhost
X-Application-Context
X-Dispatcher
X-HW
X-ORACLE-DMS-ECID
X-ORACLE-DMS-RID
P3p
X-Cdn
Allow
X-Clacks-Overhead
X-Rack-Cache
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-Origin-Upstream-Status
Surrogate-Control
X-DynaTrace
X-Country
Rating
Fusion-Content-Source
Fusion-Template-Id
Fusion-Component-Id
Fusion-Source
Fusion-Content-Id
X-FTR-Request-ID
X-Akam-SW-Version
X-Country-Code
X-Goog-Hash
Pinterest-Generated-By
X-Varnish-TTL
X-Ruxit-JS-Agent
X-TtlSet
X-Vname
X-PC
X-Instart-Request-ID
Edge-Control
X-MS-InvokeApp
X-Url
X-Mod-Pagespeed
Verso
SPRequestGuid
X-Powered-By-Plesk
X-B3-TraceId
X-D2id
X-Trace
X-SharePointHealthScore
X-VARITI-CCR
X-Sol
Response
X-Middleton-Response
Pagespeed
Display
Service-Worker-Allowed
X-Middleton-Display
X-GitHub-Request-Id
X-ESI
RTSS
Accept-Ch
Content-MD5
X-Kinja-Server
X-Use-Magma
X-Cdn-Fetch
X-Exp-Variant
X-Kinja-Revision
X-Exp-Id
X-Kinja
X-GoogleNews-Bot
X-Kinja-Build
X-Server-Name
SPIisLatency
SPRequestDuration
X-Navigation-Version
X-TTL
X-Powered-CMS
X-Abt-Application-Version
X-Debug
X-Vcache
X-Forwarded-Proto
X-Amz-Server-Side-Encryption
X-Upstream
Public-Key-Pins
X-Vcap-Request-Id
Charset
X-Cached
MS-Author-Via
X-CST
X-NF-Request-ID
X-Version
X-Amz-Rid
X-Server-ID
Edge-Cache-Tag
X-Px
Realpath
DynaTrace
Accept-Ch-Lifetime
MicrosoftSharePointTeamServices
X-Shard
Arr-Disable-Session-Affinity
TCN
X-Ezoic-Cdn
X-Trafficlayer-App-Scope
X-Trafficlayer-App-Name
X-XRDS-Location
Access-Control-Request-Method
X-Shield-Request-Id
Pinterest-Version
X-Pinterest-Rid
X-MSEdge-Ref
X-Ser
X-SRCache-Fetch-Status
X-SRCache-Store-Status
Fastly-Restarts
S
X-Fastly-Request-ID
X-Accel-Expires
X-DynaTrace-JS-Agent
X-DIS-Request-ID
X-Goog-Generation
X-Goog-Metageneration
X-Goog-Stored-Content-Encoding
X-Goog-Stored-Content-Length
X-Recruiting
X-TEC-API-ROOT
Front-End-Https
X-TEC-API-ORIGIN
X-TEC-API-VERSION
X-Client-IP
X-Amz-Meta-S3cmd-Attrs
X-Goog-Storage-Class
X-Id
X-Element-Page-Cache
Nginx-Cache
X-T
X-Varnish-Age
X-Country-Code-Real
X-FTR-Backend
X-FTR-Realm
X-FTR-DC
X-FTR-Cache-Status
X-FTR-Balancer
X-FTR-Backend-Server
Mrf-Cache-Status
MRF-Tech
Cache-Tag
X-B3-TraceId-Primal
X-Mrf-Section-Lastmod
X-Mrf-Item-Lastmod
X-FTR-Expires
X-Amzn-Trace-Id
X-Webapp-Samesite-None-Activated-N
X-Dw-Request-Base-Id
X-Ttl
Fastcgi-Cache
X-HS-Cache-Config
X-HS-Hub-Id
X-HS-Content-Id
X-Content-Digest
X-Frontend
Powered
NR-ENABLED
X-Hits
X-Correlation-Id
X-Kinsta-Cache
X-Hp-Webp
Alternate-Protocol
X-FTR-Cache-Host
X-Fastcgi-Cache
Accept-CH
Accept-CH-Lifetime
X-Request-Received
X-RateLimit-Remaining
X-Request-Processing-Time
ServerID
X-Grace
X-N
X-Aspnetmvc-Version
X-Content-Type
X-HS-Combine-CSS
Server-Name
X-Cache-Hit
X-Microsite
X-Request-Handler-Origin-Region
X-Webkit-Csp
PB-PID
PB-RID
Arc-Version
X-Mobile-Rewrite
TP-Cache
TP-L2-Cache
X-Node-Name
X-User-Agent
X-Rid
Healthy
Backend-Timing
X-Akamai-Edgescape
X-Revision
X-Analytics
X-Content-Security-Policy-Report-Only
X-Forwarded-For
X-Zen-Fury
AMP-Access-Control-Allow-Source-Origin
X-FastCGI-Cache
X-Logged-In
Server-Node
X-LB-Cache
X-Amzn-RequestId
X-Amz-Apigw-Id
X-Pad
X-Mobile-URL
X-Activity-Id
X-Az
X-AppVersion
X-GUploader-UploadID
X-Varnish-Grace
X-NWS-LOG-UUID
X-Cached-By
Cache-Status
X-B3-Sampled
X-IPLB-Instance
X-Oneagent-Js-Injection
X-Content-Options
Refresh
Retry-After
X-F-Cache
X-Type
Upgrade-Insecure-Requests
AR-CACHE
AR-PoweredBy
AR-ATIME
X-Geo-Country
X-Ruxit-Js-Agent
X-Srv
X-Varnish-Backend
Paypal-Debug-Id
X-App-Environment
FilterID
X-FB-Debug
X-Instance
X-Tumblr-User
X-Tumblr-Pixel-0
Source
X-Tumblr-Pixel
X-Debug-Info
X-Request-Guid
DC
Access-Control-Allow-Method
X-PHP-Backend
X-Cluster
X-Page-Id
X-Framework
Accept-Charset
Actual-Object-TTL
X-Jobs
Host
X-WebKit-CSP-Report-Only
X-AOL-HN
X-Cache-Key
X-B
X-Cache-Age
X-Cache-2
X-ATG-Version
X-Erf-Bev-Bev-Is-Generated
X-Erf-Bev-Bev
Ar-Sid
Cache
X-Seen-By
X-Via-JSL
X-TT
Fastcgi-Useragent
MS-CV
X-Git-Hash
X-Content-Powered-By
VIX-Pulpo-Upstream-Status
VIX-Pulpo-Node
X-PressLabs-Stats
X-Cache-TTL
X-Whom
X-B-Cache
X-Signature
X-Amz-Replication-Status
X-Cache-Control
X-UA
X-TA-CDN-Provider
X-Esi
Host-Header
X-Daa-Tunnel
X-Wix-Request-Id
AR-Request-ID
Surrogate-Key
X-Response-Served-From
X-Host-Name
NGB
X-Origin-Server
X-Cache-Enabled
X-Mobile
X-Tumblr-Pixel-1
Cache-Tv-Group
X-Tumblr-Pixel-2
Frame-Options
Payment
X-FW-Server
X-FW-Serve
X-FW-Hash
Cleartype
X-TX-ID
X-FW-Static
X-GeoIP
WPE-Backend
X-Hyper-Cache
X-FW-Type
X-RequestSource
X-Region
Eomportal-Instance
X-Handled-By
X-Cache-Action
X-Drupal-Cache-Tags
X-Cacheable-TTL
X-EdgeConnect-Cache-Status
Filters
X-Adobe-Content
X-Cache-NE
X-Adobe-Loc
Webserver
X-Cache-Operation
X-Cache-Rule
X-Hostname
X-Litespeed-Cache
X-Kong-Upstream-Latency
X-Kong-Proxy-Latency
X-SERVER
X-NewRelic-App-Data
Xserver
From-Origin
X-ATS-Timestamp
X-RemovedCookies
Datacenter
X-Load-Cache
X-UA-Device-Type
X-ProcessESI
X-Akamai-Transformed
X-Forwarded-Host
X-Cache-TTL-Remaining
X-Edge-Location
Ms-Operation-Id
X-RTag
Liferay-Portal
X-Cache-Server
X-App-Server
X-Status
X-Contextid
X-Time
X-Rule
X-Varnish-Hostname
X-Varnish-Server
X-Yottaa-Metrics
X-Yottaa-Optimizations
X-VCache
X-Oss-Storage-Class
X-Oss-Server-Time
X-B3-Traceid
X-Oss-Request-Id
X-Oss-Object-Type
X-Oss-Hash-Crc64ecma
Country
Odigeo-Trace-Id
X-ORACLE-APMCS-REQUEST-ID
X-ORACLE-APMCS-TAG
X-Upgrade-Enabled
X-BCube-Filmed-By
X-TT-TIMESTAMP
X-Cache-Var-Map
X-Cache-Var
X-ES-SERVER
Tracecode
Load-Balancing
X-Path-Route
X-UUID
X-RN-RSRV
Meta-Geo
X-Xfnlog-Site
DSUID
Cache-Tags
X-PCL
X-OCL
X-Pubstack
X-Rocket-Nginx-Bypass
X-Viewer-Country
X-Cache-Config
Mn-Server-Ip
X-Debug-Cache
X-CCM
X-VCT
Azure-RegionName
Azure-InstanceId
DB-Nickname
NGX
L5d-Success-Class
Fastly-SSL
X-From
Azure-SlotName
Azure-SiteName
Azure-Version
X-Akamai-Request-ID
X-Proxy
X-Proto
X-FC-Vary-Parameters
X-R9-Blue-Green-Version
X-TNCMS
X-Real-IP
X-Origin-Response-Time
X-Origin-Hint
X-Goog-Meta-Goog-Reserved-File-Mtime
X-FW-Dynamic
X-Hosted-By
X-IP
X-Loop
X-Via-Fastly
X-Drupal-Cache-Contexts
TWC-GeoIP-LatLong
TWC-Locale-Group
TWC-GeoIP-Country
TWC-Device-Class
S-Rt
TWC-Connection-Speed
TWC-Privacy
Webcakes-App-Name
X-Cache-Host
X-Web-Node
X-Akamai-Request-ID2
Webcakes-Region
Webcakes-App-Version
Release
Property-Id
X-Redis-Cache
X-NWS-UUID-VERIFY
X-Content-Age
X-EIG-Tracking-Id
X-FireWall-Port
X-Generated
X-Labrador-Cache-Channel
X-Human
Origin-Cache-Control
X-Format
Origin-Edge-Control
X-Access
Selected-Fe
Viewport
S-Cnection
X-ApacheServer
X-Cache-Time
X-Backend-Name
Version
Ec-Rule-Version
X-ServerID
X-Section
X-Locale
X-Site-Version
Server-Info
X-Varnish-Cache-Hits
X-Soup
X-Vgn-Hpd-Reason
Cache-Name
Decoy-Debug-Status
Decoy-Debug-TTL
Decoy-Debug-Key
X-Origin
X-Proxy-Build
X-PERF
X-Timing-Wait
X-Www-Served-By
X-Cluster-Name
X-Is-Bot
X-Rendered-As
X-Time-Microsecs
X-JoinUs
Uber-Trace-Id
X-BYPASS-REASON
X-ProxyCache-Key
X-ProxyCache-Status
X-Varnish-Hits
X-Storage
X-XRDS-LOCATION
X-Tec-Api-Origin
X-Tec-Api-Version
X-Accel-Buffering
X-Cache-Backend
X-Generated-By
X-Info
X-Tec-Api-Root
X-Origin-TTL
X-Origin-CC
X-PHP-Host
X-Amzn-Remapped-Content-Length
Akamai-GRN
Rt-Fastcgi-Cache
X-WA-Info
X-URL
Time
X-RateLimit-Limit
Cache-Key
X-Nginx-Cache-Key
X-Geo
X-CF-Powered-By
X-Presslabs-Stats
X-SaId
GEO-INFO
X-Environment-Context
X-Cache-Remote
Origin
X-L-Path
X-MServer
X-App-Version
X-No-Session
Cteonnt-Length
X-APP-VERSION
Cache-Hits
X-GoCache-CacheStatus
X-Unique-Id
X-Backend-TTL
Vix-Hermes-Req-Id
X-Guploader-Uploadid
Accept-Language
X-Tb
X-NCache
X-FB-TRIP-ID
X-CDN-Forward
X-Hit
X-Trace-Id
Srv
X-Say-Cacheable
X-SayCDN-TTL
X-SS-Set-Cookie
X-Say-TTL
Access-Control-Request-Headers
X-Device-Type
X-Tumblr-Pixel-3
X-CS
X-Shopify-Generated-Cart-Token
X-Sorting-Hat-ShopId
X-Sorting-Hat-PodId
X-Shopify-Stage
X-OVcl
X-OVcl-Cache
X-Alternate-Cache-Key
X-ShardId
X-ShopId
X-CSRF-TOKEN
X-EC-Lua
User-Cache-Control
X-B3-SpanId
X-Parent-Response-Time
NtCoent-Length
X-S
X-Region-Sid
X-Server-Time
Apple-News-Services-Host
X-G
Apple-News-Services-Handled
X-A-Dgt
X-External-Request-Id
X-ScT
X-Rojux
Apple-News-Services-Parsed-Url
X-Request-UUID
X-Rewrite-Enabled
X-RCS-CacheZone
X-Destination
X-Hl-Ver
Request-EU
X-B-Cookie
Rt-Proxy-Cache
Request-Country
Rendered-Blocks
Node
X-CF-Lambda-Version
X-CF-Lambda-Fn
X-ARC
X-Application
VivaBuild
X-A
X-A-Ccd
X-Accel-Expires-Debug
X-Aed
Viewtype
Server-Host
X-AIR-PT
T-Server
Mobile-Detection-Method
Meta-Geo-Continent
Content-Script-Type
Content-Style-Type
X-Detected-As
X-A-Dam
BehaviorPad-Version
AsisCache
X-DPWN-IS-SECURE
X-A-Wwc
Arc-Country
X-Date
X-A-Dcw
IsBot
Machine
MD5-Digest
X-Connection-Hash
X-D
X-PAYTM-SRV-ID
Cross-Origin-Window-Policy
Fastcgi-X-Cache-Version
X-Processor
Apple-News-Services-Request-Url
X-S-Cookie
X-Vtex-Processado-Em
X-Cluster-Node
X-CACHE-KEY
X-Svr
X-Vtex-Remote-Cache
X-SRCache-Key
X-Trv-Group
X-SIPLIST1
X-Cache-Grace
Xc-Version
X-Session-Fingerprint
OT-Force-Account-Verify
X-Transaction
X-Twitter-Response-Tags
X-Vdms-Version
X-VG-WebServer
X-VG-WebCache
X-Dc
X-Magnolia-Registration
X-Endurance-Cache-Level
ServedBy
X-Ms-Version
X-Source
X-Debug-Log
X-Debug-Cookies
X-Matched-Rule
X-Ms-Request-Id
X-Generated-On
X-NX-Host
X-Gen-Mode
CDCHOST
X-Proxy-Upstream
X-Dispatch
X-Proxy-Cache-Status
X-CUA
X-Core-Value
X-Cache-Bucket
X-Level-Front-Cache
X-Block-Status
Web-Mar-Node
X-IN-APIGATEWAY
Thinkindot-Control
Thinkindot-CacheControl-Type
Server-Int
X-Hash
X-Hnp-Log
Thinkindot-CacheControl
X-Cache-Info
X-IN-APIGATEWAYSSL
X-Location
X-Uri
X-Thinkindot-L3
X-Ah-Environment
X-Reboot
X-Service
ServerName
Mime-Version
X-B3-Parentspanid
X-SVT-ORM-VERSION
X-Wikidot-Static-Cache
X-Agile-Id
X-SVT-ORM-RULES
X-Agile
X-Agile-Age
X-App-Name
X-Upstream-Ht
X-Instart-Isnd
X-Backend-State
X-Azure-Ref-OriginShield
X-Azure-Ref
X-Auto-Login
X-Wikidot-Backend
X-Irp-Debug
X-Rocket-Build-Number
X-Upstream-Ct
X-JWT-State
Wxu-Next-Region
Wxu-Next-Hostname
W
X-WADP-Cache
X-Webstats-RespID
X-Is-Gdpr
X-We-Are-Hiring
X-Bip
X-Sucuri-Cache
X-Key
X-Sigma-Backend
Mail-Subject
X-Geo-Header
X-Developers
X-Sigma
X-Debug-Cache-Store
X-Debug-Cache-Expiry
X-Debug-Cache-Fetch
X-Generation-Time
We-Hiring
X-Fastly-Cache
X-Eu-Site
X-FW-Version
X-Generated-In
X-Dispatcher-Server
X-Distil-CS
X-GeoIP-City
X-Core-Mission
Proxy-Connection
X-Cache-URL
X-Scheme
X-Cache-Debug
X-C
X-Request-URI
X-Cdn-Srv
X-Via-NSCOPI
X-Cms-Context
X-Compress-Hint
X-Clientip
X-Clara-WADP
X-CGP
X-Has-Esi
X-Skip-Cache
Wxu-Next-Commit
X-Origin-Date
Kp-EeAlive
IBM-Web2-Location
HA-Ipaddr
X-Origin-Expires
Ha-Gx-Prefs
L
X-VC-Cache
AKAMAI
Now
X-VG-TLSProxy
Memcached
Magicmarker
Gh-Request-Id
X-User
X-TrackingId
Countrycode
Content-Disposition
X-RateLimit-Remaining-Second
X-RateLimit-Limit-Second
X-Up
Esi-Enabled
X-Planisys-CDN-Rules
X-Planisys-CDN-Cache
X-Planisys-CDN-TTL
X-Policy
Fastly-Soc-X-Request-Id
PFcat
X-Thanos
X-VServer
X-Reqid
Served-By
Section-Io-Cache
X-Logging-Id
RNT-Machine
RNT-Time
X-Method
X-SRV
X-Via-CDN
X-NC
Cache-Host
X-Request-Start
X-Urbn-Context-Path
X-Owner
X-Varnish-Beresp-Ttl
X-LI-UUID
X-Varnish-Beresp-Status
True-Client-Country-4JS
Cdnsip
X-B3-Spanid
SD-X-WS
Cdncip
X-Urbn-Site-Id
X-Platform-Server
X-Epic-Correlation-Id
X-ND-Cache
X-SD-PageType
X-Server-IP
X-Qloud-Router
X-TIME
Is-Eu
X-Internal-Host
X-NodeID
Pramga
X-Swa-Ws
X-MSEdge-Features
X-Distributor
X-Release
Platform
Adler-Geo
X-AK-Request-ID
X-Amz-Meta-Cache-Control
X-WebServer
X-BBXSRF
X-MSEdge-Flight
X-Variation
X-ServiceProvider
X-Varnish-Beresp-Grace
X-Li-Pop
X-Cache-Id
X-Cache-FS-Status
X-S-Maxage
Locale
X-Li-Fabric
X-Old-Content-Length
Heartbleed
Cache-Provider
X-Nc
X-LI-Proto
V-Age
Hostname
X-Trafficlayer-App-Version
CF-IPCountry
X-Servername
Server-ID
X-UnsetCookies
Powered-By-ChinaCache
Environment
X-7Graus-Varnish-XKeys
X-7Graus-Varnish-Cache-Control
GEO-REGION-INFO
X-GRACE
X-Cdn-Forward
Locid
X-Newrelic-Synthetics
X-Served-From
FNAC-ModuleRouting
X-Lb-Id
X-Req
X-FPC
X-Be
X-HTML-Minification-Powered-By
X-Nginx-Cache
A
X-Sucuri-Id
X-Servedbyhost
X-Developer
X-Refresh
X-Gamma-Serve
Geo-Info
X-Sucuri-ID
X-Device-Os
X-Microcachable
X-Sn-Servicetimems
X-Cdn-Origin
X-VHOST
X-Edge-O15-RID
X-Render-Time
X-Node-Id
ProcessTime
Tcn
X-Webkit-CSP
X-IPS-LoggedIn
X-Zone
X-NU-AKA-ACS-Version
Memory
X-Tb-Optimization-Total-Bytes-Saved
X-GeoIP-Country-Code
X-MP-GENERATED-AT
X-AWS-Id
Request-Time
X-LJ-Flow-ID
X-Pf-Uncompressing
X-VWS-Id
X-Mode
X-Ratelimit-Remaining
X-VCL-Version
X-Pjax-Url
X-FORWARDED-FOR
XServer
X-DC
X-COUNTRY
Gannett-Cam-Experience-Id
Resin-Trace
X-Correlation-ID
X-ZONE
Geoip-Latitude
Group
X-Routing-Service
X-Proxied
X-Zipkin-Id
PICS-Label
GeoIp-Country-Code
Amp-Access-Control-Allow-Source-Origin
MIME-Version
CF-Cached-On
Pics-Label
Cf-Ipcountry
TTL
X-ECACHE
X-ElasticPress-Search
X-Instart-Info
X-Pod
GeoIP-Country-Code
Geoip-City
GeoIP-Latitude
X-Var-Ttl
X-Via-Edge
Cache-Cookie-Set-Lfrom
Cache-Cookie-Set-From
X-CSRF-Token
X-Backend-Url
X-Via-SSL
Cache-Cookie-Set-Idcheck
GeoIP-City
M-TraceId
X-Bc
Ttl
X-Backend-Host
X-Unique-ID
X-BC
HostName
Backend-Name
X-NGENIX-Cache
Host-ID
Cdn
X-Dynatrace-Js-Agent
Ohc-Cache-HIT
Ohc-File-Size
X-CLOUD-TRACE-CONTEXT
Pagetype
X-Check-Cacheable
X-Vcl-Version
REQUESTUUID
X-APP
X-Request-Time
Lfy
N-Cache
X-Ratelimit-Limit
X-Cdn-Request-ID
X-PJAX-URL
X-Swift-Error
Fly-Cache
HitType
X-PF-Uncompressing
X-NGINX-Cache
Fly-Request-Id
X-Fstrz
X-TH-Server
Cache-Prefix
X-Cache-Tag
X-Via-Ucdn
X-Worker
Powered-By
X-UPSTREAM-Address
Pragrma
X-Cache-Miss-From
On-Server
X-Tt-Trace-Tag
X-Fastly-Country-Code
User-Agent
X-GEO
X-Sedo-Request-Id
URI
X-LiteSpeed-Cache-Control
X-HostName
CDN
X-HS-Status
X-Fetched-On
X-Server-W
X-WR-MODIFICATION
Media-Length
X-ServedByHost
SRV
Who
X-WA
X-BE
X-Aicache-OS
X-Wa
X-Upstream-HT
X-Upstream-CT
X-Rebelmouse-Cache-Control
Fastly-SIE
Fastly-SWR
X-SERVER-NAME
X-Rebelmouse-Surrogate-Control
AR-SID
X-LB-ID
X-Tt-Trace-Host
X-Hp-Ccpa-Warning
X-Fpc
X-TT-LOGID
FSS-Cache
X-Varnish-URL
FSS-Proxy
Dynatrace
X-LAGOON
X-Varnish-Cacheable
DataCenter
X-Cf-Powered-By
Processtime
X-NYM-Debug-Backend
UCS
X-Cache-Tags
X-ServerName
X-GDPR
X-Store
X-Fastly-Backend-Reqs
Server-Id
Debug
X-Ua
X-Ftr-Cache-Host
X-Varnish-Beresp-TTL
Cdn-Request-Time
Cdn-Host
X-Protected-By
Server-Surrogate-Control
X-Edge-Server
X-Cache-ASPX
X-Contensis-Viewer-Groups
X-Varnish-Authentication
Server-Cache-Control
Country-Code
X-Akamai-ERRuleID
X-Akamai-ERPolicy
X-SN
X-Nananana
Requestid
X-LiteSpeed-Tag
Warning
X-SB
Xet-Cookie
WP-Super-Cache
X-VC
LB
Cneonction
XxX-Cache-Status
X-RateLimit-Reset
X-Flog
X-Li-Proto
X-RSL
X-RPS
SID
Thinkindot-Cache-Type
X-Hello
SS
X-DI
X-DB
X-Dw-Trace-Id
X-Amzn-Remapped-Connection
X-RPM
X-Gen-Id
X-DW
X-DSS
X-ABtesting
Get-Access-Time
Is-Session-Tracking
X-Request-Url
X-Amzn-Remapped-Date
X-Fastly-Cache-Hits
Application
X-Action
Product
NnCoection