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