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-Id-2
X-Amz-Request-Id
X-Server-Powered-By
X-Page-Speed
X-Pingback
X-UA-Device
X-Proxy-Cache
X-Swift-SaveTime
X-Swift-CacheTime
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-Response-Time
X-Host
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-Cloud-Trace-Context
X-Readtime
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
X-Country
Rating
Fusion-Template-Id
Fusion-Content-Source
Fusion-Component-Id
Fusion-Content-Id
Fusion-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-PC
X-TtlSet
X-Vname
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-ESI
X-TTL
X-VARITI-CCR
X-Server-Name
X-GitHub-Request-Id
Service-Worker-Allowed
X-SharePointHealthScore
Content-MD5
X-Sol
X-Middleton-Response
Response
Pagespeed
X-Kinja
X-Kinja-Build
X-GoogleNews-Bot
X-Exp-Variant
X-Cdn-Fetch
X-Exp-Id
X-Kinja-Server
X-Kinja-Revision
X-Use-Magma
X-Middleton-Display
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-Amz-Server-Side-Encryption
X-Cached
X-Vcap-Request-Id
Public-Key-Pins
Charset
X-CST
MS-Author-Via
DynaTrace
X-Version
X-NF-Request-ID
X-Amz-Rid
Edge-Cache-Tag
Realpath
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-Fetch-Status
X-SRCache-Store-Status
X-Fastly-Request-ID
X-Pinterest-Rid
X-Ser
Pinterest-Version
Access-Control-Request-Method
S
X-Accel-Expires
X-TEC-API-VERSION
X-DIS-Request-ID
X-TEC-API-ORIGIN
X-TEC-API-ROOT
Fastly-Restarts
X-Client-IP
X-Goog-Stored-Content-Encoding
X-Goog-Stored-Content-Length
X-Goog-Metageneration
X-Goog-Generation
Front-End-Https
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
Cache-Tag
X-FTR-DC
X-FTR-Cache-Status
X-FTR-Backend
X-FTR-Backend-Server
X-FTR-Balancer
X-Country-Code-Real
X-FTR-Realm
X-Amzn-Trace-Id
Mrf-Cache-Status
MRF-Tech
X-Mrf-Item-Lastmod
Nginx-Cache
X-B3-TraceId-Primal
X-Mrf-Section-Lastmod
X-Server-ID
X-FTR-Expires
X-Dw-Request-Base-Id
X-Fastcgi-Cache
Fastcgi-Cache
X-Content-Digest
X-HS-Cache-Config
X-HS-Hub-Id
X-Frontend
X-HS-Content-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
Server-Name
ServerID
X-Microsite
X-HS-Combine-CSS
X-N
X-Request-Handler-Origin-Region
PB-RID
X-Cache-Hit
PB-PID
TP-L2-Cache
TP-Cache
X-Mobile-Rewrite
Arc-Version
X-Grace
X-Rid
X-RateLimit-Remaining
X-Akamai-Edgescape
Healthy
X-User-Agent
X-Node-Name
X-Analytics
Backend-Timing
X-Revision
X-Forwarded-For
X-Content-Security-Policy-Report-Only
X-Pad
X-Logged-In
X-Zen-Fury
AMP-Access-Control-Allow-Source-Origin
X-Mobile-URL
X-Amzn-RequestId
X-Amz-Apigw-Id
X-LB-Cache
Server-Node
X-Varnish-Grace
X-Oneagent-Js-Injection
X-Az
X-Activity-Id
X-AppVersion
Cache-Status
Accept-CH
X-Cached-By
Accept-CH-Lifetime
X-B3-Sampled
X-NWS-LOG-UUID
X-GUploader-UploadID
X-Content-Options
Refresh
X-F-Cache
X-Geo-Country
X-Ruxit-Js-Agent
X-IPLB-Instance
Upgrade-Insecure-Requests
X-Type
Retry-After
X-Varnish-Backend
FilterID
X-Tumblr-Pixel-0
X-App-Environment
X-Tumblr-User
X-FastCGI-Cache
X-Tumblr-Pixel
Host
X-Srv
Accept-Charset
X-Jobs
X-FB-Debug
Paypal-Debug-Id
X-AOL-HN
X-Framework
X-PHP-Backend
X-B
X-Page-Id
X-Instance
X-Cluster
X-Debug-Info
DC
Actual-Object-TTL
Source
X-Request-Guid
X-Cache-2
Access-Control-Allow-Method
X-WebKit-CSP-Report-Only
AR-ATIME
X-ATG-Version
AR-PoweredBy
Cache
AR-CACHE
X-Cache-Key
X-TT
X-Cache-Age
Fastcgi-Useragent
X-Erf-Bev-Bev-Is-Generated
X-Erf-Bev-Bev
X-Seen-By
X-Git-Hash
MS-CV
X-Content-Powered-By
X-Via-JSL
Ar-Sid
VIX-Pulpo-Upstream-Status
X-PressLabs-Stats
VIX-Pulpo-Node
X-Amz-Replication-Status
Host-Header
X-Cache-TTL
X-Whom
X-TA-CDN-Provider
X-Signature
X-B-Cache
X-Cache-Control
X-Wix-Request-Id
X-Origin-Server
X-Cache-Enabled
X-Daa-Tunnel
NGB
X-Response-Served-From
Xserver
X-UA
Surrogate-Key
X-Mobile
X-RequestSource
X-ATS-Timestamp
X-Tumblr-Pixel-2
Cache-Tv-Group
X-GeoIP
X-Tumblr-Pixel-1
X-Host-Name
X-Cacheable-TTL
X-Cache-NE
Datacenter
Payment
Filters
Eomportal-Instance
Cleartype
WPE-Backend
X-FW-Static
X-FW-Server
X-FW-Type
X-FW-Serve
X-Hyper-Cache
X-FW-Hash
X-Adobe-Loc
X-Adobe-Content
X-Litespeed-Cache
Frame-Options
X-Handled-By
X-Region
X-SERVER
X-TX-ID
X-Cache-Action
X-EdgeConnect-Cache-Status
X-Drupal-Cache-Tags
Webserver
X-Load-Cache
X-Esi
X-Kong-Proxy-Latency
X-Kong-Upstream-Latency
X-XRDS-LOCATION
X-Akamai-Transformed
X-Hostname
AR-Request-ID
X-Cache-Operation
X-Cache-Rule
From-Origin
X-Cache-TTL-Remaining
X-Edge-Location
X-RemovedCookies
X-NewRelic-App-Data
X-ProcessESI
X-UA-Device-Type
Liferay-Portal
Ms-Operation-Id
X-RTag
X-Cache-Server
X-Varnish-Hostname
X-Forwarded-Host
X-Oss-Server-Time
X-Oss-Request-Id
X-Oss-Storage-Class
X-Oss-Hash-Crc64ecma
X-Oss-Object-Type
X-ORACLE-APMCS-REQUEST-ID
X-ORACLE-APMCS-TAG
X-Varnish-Server
X-Rule
X-Yottaa-Metrics
X-Yottaa-Optimizations
X-Status
Country
X-Contextid
X-App-Server
Odigeo-Trace-Id
X-Upgrade-Enabled
X-UUID
X-BCube-Filmed-By
X-ES-SERVER
X-Cache-Var-Map
Meta-Geo
X-RN-RSRV
X-Cache-Var
Load-Balancing
X-Path-Route
DSUID
X-TT-TIMESTAMP
Webcakes-Region
X-R9-Blue-Green-Version
Mn-Server-Ip
DB-Nickname
X-Rocket-Nginx-Bypass
X-From
Webcakes-App-Name
TWC-Device-Class
X-EIG-Tracking-Id
TWC-Connection-Speed
X-Debug-Cache
X-Origin-Hint
TWC-GeoIP-LatLong
Property-Id
X-VCT
TWC-Locale-Group
Release
TWC-GeoIP-Country
X-CCM
TWC-Privacy
Webcakes-App-Version
X-FC-Vary-Parameters
X-Cache-Time
X-Cache-Config
X-Akamai-Request-ID
X-Real-IP
X-Cache-Host
X-FireWall-Port
X-Drupal-Cache-Contexts
Origin-Cache-Control
X-Origin-Response-Time
X-Hosted-By
X-PCL
X-Vgn-Hpd-Reason
X-Proto
L5d-Success-Class
X-Origin
X-OCL
X-IP
X-Pubstack
X-Human
Origin-Edge-Control
X-Loop
X-TNCMS
X-Via-Fastly
X-ServerID
X-Soup
Cache-Tags
X-Proxy-Build
Cache-Name
X-FW-Dynamic
Selected-Fe
Fastly-SSL
X-Viewer-Country
X-Timing-Wait
S-Rt
X-Redis-Cache
X-Proxy
Viewport
X-Format
X-Goog-Meta-Goog-Reserved-File-Mtime
X-Generated
X-Web-Node
X-Www-Served-By
X-Varnish-Hits
X-Locale
X-Is-Bot
X-JoinUs
X-Labrador-Cache-Channel
X-Xfnlog-Site
Uber-Trace-Id
X-Rendered-As
X-Cluster-Name
X-Backend-Name
X-Akamai-Request-ID2
X-Section
X-Site-Version
X-BYPASS-REASON
X-ProxyCache-Key
X-ProxyCache-Status
X-Access
NGX
Azure-Version
Azure-SiteName
Azure-RegionName
Azure-SlotName
Azure-InstanceId
X-NWS-UUID-VERIFY
Ec-Rule-Version
Version
X-Content-Age
X-Accel-Buffering
X-Varnish-Cache-Hits
S-Cnection
Server-Info
Decoy-Debug-TTL
Decoy-Debug-Status
Decoy-Debug-Key
X-Time-Microsecs
X-Generated-By
X-Time
X-PHP-Host
X-Cache-Backend
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-VCache
X-URL
X-Geo
X-Webkit-CSP
Rt-Fastcgi-Cache
X-Nginx-Cache-Key
X-Presslabs-Stats
X-WA-Info
Cteonnt-Length
Time
GEO-INFO
X-CF-Powered-By
X-App-Version
X-MServer
Cache-Key
X-No-Session
X-Guploader-Uploadid
X-Environment-Context
Origin
X-L-Path
X-Unique-Id
X-Cache-Remote
X-FB-TRIP-ID
X-Tec-Api-Version
Accept-Language
X-Tec-Api-Root
X-Tec-Api-Origin
X-APP-VERSION
Access-Control-Request-Headers
X-Tb
X-GoCache-CacheStatus
X-RateLimit-Limit
X-Say-TTL
X-SayCDN-TTL
X-Say-Cacheable
X-NCache
X-Backend-TTL
X-EC-Lua
Vix-Hermes-Req-Id
X-Hit
Cache-Hits
X-TIME
X-B3-Traceid
X-Trace-Id
X-Sorting-Hat-PodId
X-Shopify-Stage
X-RCS-CacheZone
X-ShardId
X-Alternate-Cache-Key
X-ShopId
X-Shopify-Generated-Cart-Token
X-Sorting-Hat-ShopId
X-Device-Type
X-B3-SpanId
X-Dc
OT-Force-Account-Verify
X-Source
X-Tumblr-Pixel-3
Mime-Version
X-CS
X-S
X-CDN-Forward
X-CACHE-KEY
X-SS-Set-Cookie
X-OVcl
Srv
X-OVcl-Cache
User-Cache-Control
X-Processor
X-CF-Lambda-Version
X-Region-Sid
X-CF-Lambda-Fn
T-Server
Viewtype
BehaviorPad-Version
X-Hl-Ver
Node
X-G
X-Date
Fastcgi-X-Cache-Version
Content-Style-Type
Cross-Origin-Window-Policy
Mobile-Detection-Method
X-External-Request-Id
X-Detected-As
MD5-Digest
Machine
X-DPWN-IS-SECURE
IsBot
Meta-Geo-Continent
X-Destination
Content-Script-Type
X-D
X-Connection-Hash
Apple-News-Services-Handled
Apple-News-Services-Host
X-Endurance-Cache-Level
Rt-Proxy-Cache
Server-Host
X-Magnolia-Registration
Apple-News-Services-Parsed-Url
Apple-News-Services-Request-Url
Request-Country
Rendered-Blocks
Request-EU
VivaBuild
Arc-Country
AsisCache
X-PAYTM-SRV-ID
X-ScT
X-A-Dcw
X-SRCache-Key
X-ARC
X-A-Dgt
X-A-Wwc
X-A-Dam
X-SIPLIST1
X-Service
X-Session-Fingerprint
X-A
X-A-Ccd
X-Application
X-Accel-Expires-Debug
X-Vdms-Version
X-AIR-PT
X-VG-WebCache
X-VG-WebServer
X-Vtex-Processado-Em
X-Vtex-Remote-Cache
X-Cluster-Node
X-Aed
X-Transaction
X-Trv-Group
X-Twitter-Response-Tags
X-Server-Time
X-Svr
X-Upstream-Ht
X-Upstream-Ct
X-Ah-Environment
X-Rojux
X-Rewrite-Enabled
Xc-Version
X-Request-UUID
X-B-Cookie
X-S-Cookie
X-Parent-Response-Time
ServerName
ServedBy
X-Reboot
X-Level-Front-Cache
X-Dispatcher-Server
X-Generated-On
X-Hash
X-ND-Cache
X-Core-Value
X-CUA
X-Instart-Isnd
Mail-Subject
X-IN-APIGATEWAYSSL
X-IN-APIGATEWAY
X-Via-NSCOPI
X-Dispatch
Wxu-Next-Commit
Wxu-Next-Hostname
Thinkindot-CacheControl-Type
Thinkindot-Control
Thinkindot-CacheControl
Wxu-Next-Region
X-Cache-Bucket
Served-By
Now
X-Webstats-RespID
X-Matched-Rule
We-Hiring
X-Thinkindot-L3
Server-Int
X-Location
X-Uri
X-CSRF-TOKEN
Proxy-Connection
X-SRV
NtCoent-Length
X-Debug-Cookies
X-B3-Parentspanid
X-Debug-Log
X-Backend-State
X-Debug-Cache-Store
X-Compress-Hint
X-Developers
X-Cache-Debug
X-CGP
X-Cdn-Srv
X-Cache-URL
X-Cache-Info
X-Cache-FS-Status
X-Clara-WADP
X-Clientip
X-Bip
X-BBXSRF
X-Debug-Cache-Expiry
X-Block-Status
X-C
X-Cms-Context
X-Core-Mission
X-Debug-Cache-Fetch
X-RateLimit-Limit-Second
X-SD-PageType
X-Scheme
X-S-Maxage
X-Server-IP
X-Sigma
X-Skip-Cache
X-Sigma-Backend
X-Rocket-Build-Number
X-Request-URI
X-Azure-Ref-OriginShield
X-Qloud-Router
X-RateLimit-Remaining-Second
X-Release
X-Request-Start
X-Reqid
X-Sucuri-Cache
X-SVT-ORM-RULES
X-WADP-Cache
X-VServer
X-We-Are-Hiring
X-WebServer
X-Wikidot-Static-Cache
X-Wikidot-Backend
X-VG-TLSProxy
X-VC-Cache
X-Thanos
X-SVT-ORM-VERSION
X-TrackingId
X-Up
X-Variation
X-User
X-Proxy-Upstream
X-Proxy-Cache-Status
X-Hnp-Log
X-Has-Esi
X-GeoIP-City
X-Irp-Debug
X-Is-Gdpr
X-Key
X-JWT-State
X-Geo-Header
X-Generation-Time
X-Epic-Correlation-Id
X-Distributor
X-Eu-Site
X-Fastly-Cache
X-Gen-Mode
X-FW-Version
X-Li-Fabric
X-Li-Pop
X-Owner
X-Origin-Expires
X-Planisys-CDN-Cache
X-Planisys-CDN-Rules
X-Platform-Server
X-Planisys-CDN-TTL
X-Origin-Date
X-Old-Content-Length
X-Logging-Id
X-LI-UUID
X-Method
X-Ms-Request-Id
X-NX-Host
X-Ms-Version
X-Distil-CS
X-Agile-Id
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-Amz-Meta-Cache-Control
Section-Io-Cache
X-Agile-Age
X-Agile
Web-Mar-Node
RNT-Time
X-Auto-Login
X-App-Name
SD-X-WS
W
X-Nc
Cache-Provider
Powered-By-ChinaCache
X-Cache-Id
Server-ID
X-LI-Proto
X-Policy
X-Swa-Ws
X-Trafficlayer-App-Version
Kp-EeAlive
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-HTML-Minification-Powered-By
X-GRACE
X-Newrelic-Synthetics
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
X-NU-AKA-ACS-Version
X-Developer
Geo-Info
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
HostName
X-ZONE
X-Unique-ID
XServer
X-NODE
X-Cdn-Request-ID
X-Instart-Info
Host-ID
X-Swift-Error
X-ElasticPress-Search
X-Request-Time
X-ECACHE
Geoip-City
X-CLOUD-TRACE-CONTEXT
MIME-Version
X-Backend-Host
X-Backend-Url
X-Var-Ttl
X-TH-Server
Ttl
X-NGINX-Cache
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