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