Threat Level: green Handler on Duty: Xavier Mertens

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
X-Powered-By
Pragma
CF-Cache-Status
Link
ETag
Expect-CT
Via
CF-RAY
Age
X-Cache
X-XSS-Protection
Content-Security-Policy
Access-Control-Allow-Origin
Content-Language
X-Xss-Protection
X-Cache-Hits
Referrer-Policy
X-Amz-Cf-Pop
P3P
X-Amz-Cf-Id
X-UA-Compatible
X-Served-By
CF-Ray
Alt-Svc
X-Varnish
X-Request-Id
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Download-Options
X-AspNet-Version
Access-Control-Allow-Credentials
X-Runtime
X-FRAME-OPTIONS
X-Drupal-Cache
X-Check
X-Adblock-Key
Content-Security-Policy-Report-Only
X-Cacheable
X-Permitted-Cross-Domain-Policies
X-Generator
X-Cache-Status
X-DNS-Prefetch-Control
X-Ua-Compatible
Timing-Allow-Origin
P3p
X-Iinfo
X-Template
X-Language
Status
Upgrade
X-Content-Security-Policy
X-AspNetMvc-Version
X-CDN
X-Buckets
Content-Encoding
Access-Control-Expose-Headers
X-Request-ID
X-Kinja-Server-Push
Access-Control-Max-Age
Keep-Alive
X-Via
X-AH-Environment
X-Envoy-Upstream-Service-Time
X-Turbo-Charged-By
X-Drupal-Dynamic-Cache
X-Cache-Group
X-Pass-Why
X-Ws-Request-Id
X-Backend
X-Age
X-Server
X-Proxy-Cache
X-Amz-Id-2
X-Amz-Request-Id
EagleId
X-Robots-Tag
Xkey
X-Page-Speed
X-Hacker
Feature-Policy
X-Server-Powered-By
X-Pingback
Request-Context
Server-Timing
X-Nginx-Cache-Status
X-Swift-SaveTime
X-Swift-CacheTime
Ali-Swift-Global-Savetime
Grace
X-UA-Device
X-Varnish-Cache
X-Amz-Version-Id
Cf-Railgun
Report-To
X-OneAgent-JS-Injection
X-Rq
X-LiteSpeed-Cache
X-Server-Id
X-Device
X-Origin-Cache
X-Styx-Req-Id
X-Pantheon-Styx-Hostname
X-Vhost
X-Host
EagleEye-TraceId
X-Backend-Server
X-Node
X-Response-Time
X-Dispatcher
X-Ac
NEL
X-WebKit-CSP
X-Cache-Lookup
X-Origin-Upstream-Status
X-Dns-Prefetch-Control
Surrogate-Control
Request-Id
X-Readtime
X-Ruxit-JS-Agent
Content-Location
X-Application-Context
Fusion-Component-Id
Fusion-Template-Id
Fusion-Content-Source
Fusion-Content-Id
Fusion-Source
X-ORACLE-DMS-ECID
X-DataDome
X-HW
X-ORACLE-DMS-RID
X-Cnection
X-Mod-Pagespeed
X-Country
X-Akam-SW-Version
Edge-Control
Rating
X-Url
X-Rack-Cache
X-Cloud-Trace-Context
X-Clacks-Overhead
RTSS
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-FTR-Request-ID
X-Goog-Hash
X-PC
X-TtlSet
X-Vname
X-Country-Code
X-ASPNET-VERSION
Fusion-Deployment-Id
X-DynaTrace
Allow
X-GitHub-Request-Id
Verso
Service-Worker-Allowed
X-Varnish-TTL
Accept-CH
X-Instart-Request-ID
X-MS-InvokeApp
X-D2id
X-GoogleNews-Bot
X-Exp-Variant
X-Exp-Id
X-Cdn-Fetch
X-Kinja
X-Kinja-Build
X-Kinja-Server
X-Use-Magma
X-Kinja-Revision
Content-MD5
Pinterest-Generated-By
X-Server-Name
SPRequestGuid
Accept-CH-Lifetime
X-Cached
X-Powered-By-Plesk
X-Forwarded-Proto
X-Navigation-Version
X-Trace
TCN
X-Amz-Server-Side-Encryption
X-SharePointHealthScore
X-Amz-Rid
X-Abt-Application-Version
X-TEC-API-ORIGIN
X-TEC-API-VERSION
X-TEC-API-ROOT
Public-Key-Pins
X-Fastly-Request-ID
X-Vcache
Nginx-Cache
X-Vcap-Request-Id
X-Ttl
X-Debug
X-MSEdge-Ref
X-ESI
SPRequestDuration
X-VARITI-CCR
SPIisLatency
Arr-Disable-Session-Affinity
Charset
X-Accel-Expires
X-B3-TraceId
X-Cache-TTL
X-DynaTrace-JS-Agent
MS-Author-Via
X-NF-Request-ID
NR-ENABLED
X-Middleton-Response
Display
Pagespeed
Response
X-Middleton-Display
X-Px
X-Content-Type
X-Sol
Realpath
X-Client-IP
Cache-Tag
X-Ser
X-SRCache-Fetch-Status
S
X-SRCache-Store-Status
X-Server-ID
Edge-Cache-Tag
Access-Control-Request-Method
X-Id
X-Powered-CMS
X-Grace
X-Pinterest-Rid
Pinterest-Version
WPE-Backend
X-Webkit-Csp
Front-End-Https
X-Fastcgi-Cache
X-Jurisdiction
X-Hp-Webp
X-Shield-Request-Id
X-Upstream
X-T
X-Hits
X-Version
AR-PoweredBy
X-Element-Page-Cache
AR-ATIME
AR-Request-ID
X-Amz-Meta-S3cmd-Attrs
X-Content-Digest
X-Dw-Request-Base-Id
DynaTrace
X-Node-Name
X-Mrf-Section-Lastmod
Mrf-Cache-Status
X-B3-TraceId-Primal
X-Mrf-Item-Lastmod
MRF-Tech
X-Cache-Hit
Fastcgi-Cache
ServerID
X-Recruiting
X-Correlation-Id
X-Mobile-URL
AR-CACHE
Ar-Sid
X-FTR-Cache-Status
X-FTR-DC
X-FTR-Balancer
X-Country-Code-Real
X-FTR-Backend
X-FTR-Backend-Server
X-FTR-Realm
X-Goog-Stored-Content-Length
X-Goog-Generation
X-Goog-Stored-Content-Encoding
X-GUploader-UploadID
X-Goog-Storage-Class
X-Goog-Metageneration
AMP-Access-Control-Allow-Source-Origin
X-HS-Hub-Id
X-HS-Content-Id
X-HS-Cache-Config
X-Request-Received
X-Frontend
X-Request-Processing-Time
Powered
Server-Node
PB-PID
PB-RID
TP-L2-Cache
TP-Cache
X-FTR-Expires
X-Forwarded-For
X-DIS-Request-ID
X-Mobile-Rewrite
Arc-Version
Upgrade-Insecure-Requests
Refresh
X-Ezoic-Cdn
X-Shard
X-HS-Combine-CSS
Alternate-Protocol
Host-Header
Accept-Ch
Server-Name
X-XRDS-Location
X-Geo-Country
X-Amzn-Trace-Id
X-Request-Handler-Origin-Region
X-NWS-LOG-UUID
X-Microsite
X-TTL
X-N
X-Rid
Fastly-Restarts
X-LB-Cache
X-Page-Id
X-Akamai-Edgescape
X-FTR-Cache-Host
X-F-Cache
X-Logged-In
X-ATS-Timestamp
X-User-Agent
Backend-Timing
X-B
X-Varnish-Age
X-Aspnetmvc-Version
X-Content-Security-Policy-Report-Only
X-Kong-Upstream-Latency
X-Kong-Proxy-Latency
X-XRDS-LOCATION
Accept-Ch-Lifetime
MicrosoftSharePointTeamServices
X-Cache-Key
X-FastCGI-Cache
X-Kinsta-Cache
X-Zen-Fury
Healthy
X-ORACLE-APMCS-REQUEST-ID
X-ORACLE-APMCS-TAG
X-Via-JSL
X-Origin-Server
X-Varnish-Grace
X-Esi
X-Revision
X-Jobs
Host
X-Tumblr-Pixel-0
Fastcgi-Useragent
X-Request-Guid
X-Instance
X-Varnish-Backend
X-Tumblr-User
X-Tumblr-Pixel
X-App-Environment
X-Cache-Age
Paypal-Debug-Id
Actual-Object-TTL
X-Hostname
X-ATG-Version
X-Git-Hash
X-B3-Sampled
X-B-Cache
X-FB-Debug
Section-Io-Cache
X-AOL-HN
X-Seen-By
X-Amz-Replication-Status
X-Type
X-TT
X-Whom
X-Signature
X-Cache-Action
X-Cluster
X-Debug-Info
Frame-Options
X-WebKit-CSP-Report-Only
Cache-Status
Access-Control-Allow-Method
Trailer
X-Content-Options
X-Amzn-Requestid
X-Cache-Rule
X-Presslabs-Stats
X-Endurance-Cache-Level
X-Cache-Operation
X-Contextid
X-Content-Powered-By
Source
X-Erf-Bev-Bev-Is-Generated
X-Erf-Bev-Bev
X-Host-Name
X-SERVER
Tracecode
X-AppVersion
Liferay-Portal
X-Az
X-Activity-Id
Accept-Charset
X-FireWall-Port
X-Tt-Trace-Tag
X-Tt-Trace-Host
X-Daa-Tunnel
X-IPLB-Instance
X-Amz-Apigw-Id
X-Upgrade-Enabled
X-PHP-Backend
DC
From-Origin
X-APP-VERSION
X-Framework
X-WA-Info
NGB
X-Response-Served-From
X-Accel-Buffering
X-Tumblr-Pixel-2
X-Tumblr-Pixel-1
X-RemovedCookies
Retry-After
X-ProcessESI
X-FW-Static
VIX-Pulpo-Upstream-Status
X-FW-Hash
X-FW-Type
X-Is-Bot
X-FW-Serve
X-UUID
X-FW-Server
X-Rendered-As
VIX-Pulpo-Node
Surrogate-Key
Srv
X-Adobe-Loc
X-Adobe-Content
Payment
X-L-Path
X-Cacheable-TTL
X-Environment-Context
X-Region
X-Wix-Request-Id
X-GeoIP
X-RequestSource
X-Cache-NE
Eomportal-Instance
X-Varnish-Server
X-Time-Microsecs
X-Mobile
X-Cached-By
X-Handled-By
Filters
X-RateLimit-Remaining
X-UA-Device-Type
X-Unique-Id
X-Proxy
X-Varnish-Hostname
X-Origin-Response-Time
Xserver
X-NGENIX-Cache
Nel
X-TIME
X-Cache-TTL-Remaining
Filterid
X-Webkit-CSP
Datacenter
X-EdgeConnect-Cache-Status
X-B3-Traceid
X-Cache-Control
X-Cache-Server
X-Cache-Time
X-Akamai-Transformed
GEO-INFO
X-Srv
MS-CV
X-Backend-Name
Version
X-CST
X-Status
Server-Info
Cache-Tv-Group
X-Rule
X-Mode
S-Cnection
Odigeo-Trace-Id
Cache-Tags
X-Cache-Enabled
X-Yottaa-Optimizations
X-Yottaa-Metrics
X-Cache-2
X-Cache-Var
X-CCM
X-Cache-Var-Map
X-IP
Webserver
X-Path-Route
X-ES-SERVER
Meta-Geo
DB-Nickname
X-FW-Dynamic
X-Detected-As
Ec-Rule-Version
S-Rt
X-Amzn-Remapped-Content-Length
OT-Force-Account-Verify
X-Loop
X-Redis-Cache
X-RN-RSRV
X-FC-Vary-Parameters
X-TNCMS
Cross-Origin-Window-Policy
Akamai-GRN
Azure-RegionName
Azure-Version
X-Forwarded-Host
Azure-SlotName
Azure-SiteName
Cache-Hits
Azure-InstanceId
Now
Webcakes-App-Version
X-PERF
X-Proto
Webcakes-App-Name
X-TX-ID
TWC-Locale-Group
TWC-Privacy
X-Adobe-Source
X-Pubstack
X-R9-Blue-Green-Version
X-Say-TTL
X-Say-Cacheable
X-NCache
Webcakes-Region
X-Real-IP
X-ServerID
X-Origin-Hint
X-SayCDN-TTL
TWC-GeoIP-LatLong
X-Via-Fastly
X-Human
X-Origin
Origin-Cache-Control
X-Hosted-By
X-Hl-Ver
Decoy-Debug-Key
Decoy-Debug-Status
NGX
Origin-Edge-Control
Country
TWC-Connection-Speed
TWC-Device-Class
TWC-GeoIP-Country
ServedBy
X-ApacheServer
X-Web-Node
Property-Id
Cleartype
Decoy-Debug-TTL
X-Goog-Meta-Goog-Reserved-File-Mtime
X-Generated
X-Format
X-LJ-Flow-ID
X-Locale
X-ProxyCache-Key
X-Proxy-Cache-Status
X-EIG-Tracking-Id
X-Cache-Config
Section-Io-Origin-Time-Seconds
Section-Io-Origin-Status
Section-Origin-Responded
X-Alternate-Cache-Key
X-BYPASS-REASON
X-AWS-Id
X-ProxyCache-Status
X-RCS-CacheZone
Content-Disposition
X-VWS-Id
X-Vgn-Hpd-Reason
X-Akamai-Request-ID2
X-Cache-NGX
X-Device-Type
X-Cache-Status-Check
X-Tb
X-Sorting-Hat-ShopId
X-ShopId
X-ShardId
X-Shopify-Generated-Cart-Token
X-Shopify-Stage
X-Sorting-Hat-PodId
X-Site-Version
Section-Io-Id
X-NYM-Debug-Backend
Access-Control-Request-Headers
Cache-Key
X-HTML-Minification-Powered-By
X-Section
X-Proxy-Build
X-Www-Served-By
X-Debug-Cache
X-FB-TRIP-ID
X-Routing-Service
X-Proxied
X-SaId
X-Zipkin-Id
X-Xfnlog-Site
X-Viewer-Country
X-Timing-Wait
X-Access
X-MP-GENERATED-AT
Node
X-BCube-Filmed-By
X-JoinUs
Mn-Server-Ip
Selected-Fe
X-Content-Age
X-Cache-Remote
X-Soup
X-Microcachable
X-Oss-Server-Time
X-Oss-Storage-Class
X-Oss-Hash-Crc64ecma
X-Oss-Request-Id
X-No-Session
X-Cdn
X-Oss-Object-Type
X-Backend-TTL
X-Request-Time
X-EC-Lua
X-Dc
X-Varnish-Hits
X-Akamai-Request-ID
X-Pinterest-Direct
X-Generated-By
Cf-Ipcountry
X-From
Accept-Language
X-Pad
X-Geo
Time
X-Drupal-Cache-Tags
X-IPS-LoggedIn
X-NewRelic-App-Data
X-CF-Powered-By
X-Azure-Ref
X-Old-Content-Length
X-NC
X-URL
Uber-Trace-Id
X-VCT
FilterID
X-RTag
X-Amzn-RequestId
X-Source
Ms-Operation-Id
X-NWS-UUID-VERIFY
X-Uri
X-RateLimit-Limit
X-CS
X-PressLabs-Stats
X-Edge
X-MCACHE
X-Cache-Grace
Cache-Name
User-Agent
X-UA
X-GoCache-CacheStatus
X-PHP-Host
X-OCL
X-Newrelic-Synthetics
X-Labrador-Cache-Channel
X-PCL
X-Qloud-Router
X-Varnish-Cache-Hits
X-Litespeed-Cache
Cache
X-ECACHE
X-FORWARDED-FOR
X-Drupal-Cache-Contexts
X-Edge-Location
X-APP
Proxy-Connection
X-Nginx-Cache
X-Magnolia-Registration
X-Hyper-Cache
Arc-Country
Apple-News-Services-Request-Url
AsisCache
BehaviorPad-Version
Apple-News-Services-Handled
User-Cache-Control
Apple-News-Services-Host
Apple-News-Services-Parsed-Url
X-Vtex-Processado-Em
Fastcgi-X-Cache-Version
Mobile-Detection-Method
Meta-Geo-Continent
Rendered-Blocks
Request-Country
Request-EU
T-Server
Memcached
GEO-REGION-INFO
ServerName
Machine
MD5-Digest
Xc-Version
X-Vtex-Remote-Cache
X-Trv-Group
X-FW-Version
X-External-Request-Id
X-G
X-GeoIP-Country-Code
X-Info
X-DPWN-IS-SECURE
X-Session-Fingerprint
X-Date
X-Destination
X-SRCache-Key
X-Developer
X-Instart-Info
X-PAYTM-SRV-ID
X-ScT
X-S-Cookie
X-Rocket-Nginx-Bypass
X-Rojux
X-Rewrite-Enabled
X-Request-UUID
X-Processor
X-Reboot
X-Region-Sid
X-Request-URI
X-D
X-Transaction
X-Tumblr-Pixel-3
X-Twitter-Response-Tags
X-A-Ccd
X-A-Dam
X-A-Dgt
X-Vdms-Version
X-A
X-VG-WebServer
Viewtype
VivaBuild
X-VG-WebCache
X-A-Wwc
X-Accel-Expires-Debug
X-Cdn-Srv
X-CF-Lambda-Fn
X-CF-Lambda-Version
X-Connection-Hash
X-Cache-Bucket
X-B-Cookie
X-Aed
X-S
X-Application
X-ARC
True-Client-Country-4JS
X-A-Dcw
X-Mid
X-Cluster-Name
X-CDN-Forward
CF-Cached-On
X-Clara-WADP
X-Contensis-Viewer-Groups
X-Cdn-Origin
X-Cache-URL
X-Cache-ASPX
X-Cache-Info
X-DevSite-Last-Modified
X-Generated-On
X-GeoIP-City
X-Hnp-Log
X-Gen-Mode
X-Gamma-Serve
X-Block-Status
X-Fastly-Cache
X-Fmm-Version
X-Core-Value
X-BBXSRF
Server-Surrogate-Control
Thinkindot-CacheControl
Thinkindot-CacheControl-Type
Server-Host
Server-Cache-Control
Rt-Fastcgi-Cache
SD-X-WS
Thinkindot-Control
Viewport
X-Backend-Host
X-Backend-State
X-IN-APIGATEWAY
X-Auto-Login
X-VCache
Web-Mar-Node
X-COUNTRY
X-Bc-Bl
X-Level-Front-Cache
X-VServer
X-WADP-Cache
X-We-Are-Hiring
X-VG-TLSProxy
X-Varnish-Authentication
X-Trafficlayer-App-Scope
X-Trafficlayer-App-Version
X-Webstats-RespID
X-Wikidot-Backend
X-Is-Gdpr
X-JWT-State
X-Has-Esi
X-Geo-Header
X-Wikidot-Static-Cache
Vix-Hermes-Req-Id
X-Trafficlayer-App-Name
X-TrackingId
X-LI-Proto
X-LI-UUID
X-Micro-Cache
X-Li-Pop
X-Li-Fabric
X-Irp-Debug
Proxy-Firewall
X-Request-Host
X-Served-From
X-Sn-Servicetimems
X-Thinkindot-L3
X-Slack-Backend
X-ServiceProvider
X-Server-W
X-Servername
X-IN-APIGATEWAYSSL
X-Matched-Rule
Cache-Cookie-Set-Lfrom
Content-Script-Type
X-Sucuri-ID
N-Cache
Content-Style-Type
Cache-Cookie-Set-Idcheck
On-Server
Gh-Request-Id
Cache-Cookie-Set-From
X-Storage
X-UnsetCookies
X-Varnish-Ttl
X-S-Maxage
A
X-Swa-Ws
X-Distributor
X-Distil-CS
X-TT-TIMESTAMP
X-Epic-Correlation-Id
X-SN
X-Fetched-On
X-Cache-PHP
Fastly-SWR
X-Eu-Site
X-Cache-Tags
X-Platform-Server
X-Dispatcher-Server
X-Core-Mission
X-Cluster-Node
X-Trace-Id
X-Debug-Cookies
X-Thanos
Fastly-SIE
X-Debug-Log
X-Clientip
Adler-Geo
X-Dispatch
FNAC-ModuleRouting
X-Device-Os
X-CUA
X-Sigma-Backend
X-NodeID
X-Rebelmouse-Surrogate-Control
X-Nginx-Cache-Key
X-Req
X-Ms-Request-Id
X-Ms-Version
X-NX-Host
X-Rebelmouse-Cache-Control
X-RateLimit-Limit-Second
X-Proxy-Upstream
X-RateLimit-Remaining-Second
X-Owner
X-Origin-Date
X-Origin-Expires
CDCHOST
X-Rocket-Build-Number
X-Sigma
X-Hash
Group
X-Generated-In
Fastly-Drupal-HTML
X-SIPLIST1
X-SS-Set-Cookie
Countrycode
Platform
X-Logging-Id
X-Scheme
Cache-Host
Country-Code
X-LAGOON
X-Skip-Cache
X-CGP
Wxu-Next-Hostname
X-Var-Ttl
Wxu-Next-Commit
Mail-Subject
We-Hiring
Heartbleed
Locid
X-WebServer
X-Agile-Id
X-Agile-Age
X-Agile
W
Locale
RNT-Machine
X-Urbn-Context-Path
X-Urbn-Site-Id
AKAMAI
RNT-Time
Server-ID
V-Age
X-Cms-Context
X-Developers
X-Generation-Time
X-App-Name
Wxu-Next-Region
X-VC-Cache
Is-Eu
IsBot
HA-Ipaddr
Ha-Gx-Prefs
X-Variation
X-Cache-FS-Status
X-Varnish-Cacheable
Kp-EeAlive
X-Bip
L5d-Success-Class
X-App-Server
Request-Time
X-Hit
NM-Fastcgi-Cache
X-C
X-Varnish-Beresp-Status
X-Varnish-Beresp-Grace
X-Cache-Expired-At
X-Response-By
X-CSRF-Token
X-Vdms-Path
X-RESPONSE-TIME
X-Refresh
X-B3-Spanid
X-Debug-Cache-Expiry
X-Instart-Isnd
X-Debug-Cache-Fetch
X-OVcl-Cache
X-OVcl
X-Debug-Cache-Store
X-CLOUD-TRACE-CONTEXT
X-Varnish-Beresp-Ttl
Sever-Int
PFcat
Server-Hostname
Server-Ext
X-TA-CDN-Provider
X-CACHE-KEY
X-Node-Id
Pagetype
M-TraceId
HostName
Mime-Version
X-Nc
X-Protected-By
X-Method
X-FPC
X-Parent-Response-Time
X-Time
X-Ratelimit-Remaining
X-Ua-Device
Magicmarker
PICS-Label
X-Varnish-URL
X-Via-PopV
Powered-By-ChinaCache
Origin
Geo-Info
X-Via-PopH
X-Worker
Geoip-City
Geoip-Latitude
X-Wa
X-Lb-Id
X-Envoy-Upstream-Healthchecked-Cluster
X-SRV
X-MSEdge-Flight
X-Branch-Name
Pramga
X-MSEdge-Features
X-Request-Start
X-Be
Cloudfront-Viewer-Country
Memory
X-ND-Cache
X-Service
X-Policy
GeoIp-Country-Code
X-GEO
X-SERVER-NAME
X-ECache
X-Planisys-CDN-TTL
XServer
X-Planisys-CDN-Rules
X-C-Key
HitType
X-C-Zone
X-Pjax-Url
X-Planisys-CDN-Cache
X-Load-Cache
X-HS-Status
Esi-Enabled
Environment
X-BACKEND-TTL
X-DC
X-Wix-Viewer-Type
Dt-Cache-Category
Who
Cteonnt-Length
X-Azure-Ref-OriginShield
X-Newrelic-App-Data
X-Myra-Origin2
X-Zone
X-Bc
X-Reqid
X-Via-Ucdn
NtCoent-Length
X-Cdn-Forward
X-Ua
X-Up
X-Servedbyhost
Fastly-Backend-Name
X-VCL-Version
X-Referer
X-Country-IP
X-CSRF-TOKEN
TTL
X-Cache-Metadata
X-Ratelimit-Limit
X-Origin-TTL
X-Vcl-Version
Ttl
X-Origin-CC
SRV
X-Server-Time
Cdn
X-Oneagent-Js-Injection
X-BC
X-Cache-Host
X-ServedByHost
Pragrma
X-ZONE
Product
X-TT-LOGID
Resin-Trace
UCS
Hostname
X-NGINX-Cache
X-Swift-Error
X-Edge-Server
Cdn-Host
Cdn-Request-Time
X-Fastly-Country-Code
X-Pf-Uncompressing
X-App-Version
Release
X-Server-IP
X-AK-Request-ID
Cdnsip
Cdncip
X-Correlation-ID
CACHE
Load-Balancing
Lb
X-NU-AKA-ACS-Version
FSS-Cache
X-AIR-PT
X-Tec-Api-Root
X-Tec-Api-Origin
X-Tec-Api-Version
X-Ruxit-Js-Agent
X-Datadome
X-SVT-ORM-VERSION
X-SVT-ORM-RULES
C-Via
X-Node-ID
X-Configured-By
LB
X-PJAX-URL
GeoIP-Country-Code
Sid
X-WA
X-WPE-Loopback-Upstream-Addr
Warning
GeoIP-Latitude
Dnion-Transfer-Encoding
GeoIP-City
X-Air-Hostname
Ohc-File-Size
MIME-Version
X-Tb-Optimization-Total-Bytes-Saved
X-Esi-Check
X-Cache-Id
X-Location
My-App
X-BE
X-Gzip
X-Cache-Backend
X-UPSTREAM-Address
X-TH-Server
Ohc-Cache-HIT
X-Varnish-Url
RequestId
X-Cache-Debug
X-RAMCache
X-Sucuri-Cache
X-Powered-Y
X-Mvc-Supplant-Cachable
X-Svr
X-VarnishDD-TTL
Pics-Label
X-Varnish-Beresp-TTL
X-Fpc
X-Fastly-Request-Id
Lfy
X-Mvc-Supplant-OutputCached
X-B3-SpanId
X-Fastly-Backend-Reqs
IBM-Web2-Location
X-Apw-Access-Object
X-Apw-Access-Action
X-Dynatrace-Js-Agent
X-Apw-Access-Token
X-Apw-Hits
X-MID
X-Edge-O15-RID
Server-Int
Xet-Cookie
X-Agile-Brick-Ok
Requestid
X-User
Processtime
Fastly-SSL
X-ElasticPress-Query
CDN
X-ElasticPress-Search
X-Page-Impression-Id
X-Flow-Id
X-LiteSpeed-Cache-Control
Amp-Access-Control-Allow-Source-Origin
X-Zalando-Child-Request-Id
X-Ocache
CF-IPCountry
X-Amzn-Remapped-Date
X-Aicache-OS
X-Debug-Revision
X-Amzn-Remapped-Connection
X-Akamai-ERPolicy
X-Akamai-ERRuleID
Host-ID
Powered-By
X-B3-Parentspanid
X-Unique-ID
Cneonction
X-Debug-Controller
X-Check-Cacheable
X-SD-PageType
X-Sucuri-Id
X-Fastly-Cache-Hits
X-Request-URL
CloudFront-Viewer-Country
X-Cache-Tag
X-Request-Url
X-Nananana
X-PF-Uncompressing
X-LB-ID
URI
X-Dw-Trace-Id
X-MiniProfiler-Ids
DataCenter