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