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