Threat Level: green Handler on Duty: Johannes Ullrich

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
X-Frame-Options
Content-Length
Strict-Transport-Security
X-Content-Type-Options
Accept-Ranges
Last-Modified
Link
X-Powered-By
CF-Cache-Status
Pragma
ETag
CF-RAY
Expect-CT
Via
Age
X-Cache
X-XSS-Protection
Content-Security-Policy
Access-Control-Allow-Origin
Content-Language
X-Xss-Protection
P3P
Referrer-Policy
X-Cache-Hits
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-UA-Compatible
X-Served-By
Alt-Svc
X-Request-Id
X-Varnish
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Download-Options
X-AspNet-Version
Access-Control-Allow-Credentials
X-Runtime
X-Drupal-Cache
X-Check
Content-Security-Policy-Report-Only
X-Adblock-Key
X-Permitted-Cross-Domain-Policies
X-Generator
X-Cache-Status
CF-Ray
X-Cacheable
X-DNS-Prefetch-Control
X-Kinja-Server-Push
Timing-Allow-Origin
X-Template
X-Language
X-FRAME-OPTIONS
X-AspNetMvc-Version
X-Ua-Compatible
X-Iinfo
Status
X-Buckets
X-Content-Security-Policy
X-CDN
Content-Encoding
Upgrade
Access-Control-Expose-Headers
Access-Control-Max-Age
X-Envoy-Upstream-Service-Time
Keep-Alive
X-Via
X-Drupal-Dynamic-Cache
X-Ws-Request-Id
X-Server
X-Turbo-Charged-By
X-AH-Environment
X-Backend
P3p
X-Age
X-Cache-Group
X-Robots-Tag
Xkey
X-Proxy-Cache
Feature-Policy
X-Request-ID
Request-Context
X-Amz-Id-2
X-Amz-Request-Id
X-Hacker
X-Page-Speed
EagleId
X-UA-Device
X-Server-Powered-By
X-Nginx-Cache-Status
X-Pingback
Grace
X-Varnish-Cache
Server-Timing
X-LiteSpeed-Cache
X-Swift-CacheTime
X-Swift-SaveTime
Report-To
Ali-Swift-Global-Savetime
X-Amz-Version-Id
X-WebKit-CSP
X-Dns-Prefetch-Control
X-Server-Id
Cf-Railgun
X-Rq
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Origin-Cache
X-OneAgent-JS-Injection
EagleEye-TraceId
X-Host
X-Device
Surrogate-Control
X-Response-Time
X-Vhost
X-Backend-Server
X-Cache-Lookup
X-Ac
X-Node
X-Origin-Upstream-Status
X-Readtime
X-Dispatcher
X-HW
Fusion-Template-Id
Fusion-Content-Source
Fusion-Content-Id
Fusion-Component-Id
Fusion-Source
Request-Id
X-DataDome
X-Pass-Why
Content-Location
X-Mod-Pagespeed
X-Application-Context
NEL
X-ORACLE-DMS-ECID
X-Akam-SW-Version
X-ORACLE-DMS-RID
Fusion-Deployment-Id
X-Country
X-Ruxit-JS-Agent
Allow
X-EdgeConnect-MidMile-RTT
X-EdgeConnect-Origin-MEX-Latency
Rating
X-Country-Code
Edge-Control
X-Clacks-Overhead
X-Cloud-Trace-Context
X-Cnection
X-Url
X-Px
X-Rack-Cache
X-FTR-Request-ID
Accept-CH
RTSS
X-Goog-Hash
MS-Author-Via
X-Vname
X-PC
X-TtlSet
X-Powered-By-Plesk
Verso
X-Ttl
Accept-CH-Lifetime
X-B3-TraceId
X-DynaTrace
Public-Key-Pins
Service-Worker-Allowed
X-GitHub-Request-Id
X-Exp-Id
X-Kinja-Revision
X-Kinja-Server
X-Use-Magma
X-Kinja-Build
X-Kinja
X-Exp-Variant
X-GoogleNews-Bot
X-Cdn-Fetch
X-MS-InvokeApp
Response
Pagespeed
X-Middleton-Display
X-Middleton-Response
X-Amz-Server-Side-Encryption
X-Sol
X-Varnish-TTL
Display
Arr-Disable-Session-Affinity
X-Forwarded-Proto
X-Cache-TTL
X-D2id
X-Amz-Rid
Pinterest-Generated-By
X-CST
TCN
X-Abt-Application-Version
X-Cached
X-Vcap-Request-Id
X-NF-Request-ID
X-VARITI-CCR
X-Content-Type
X-Navigation-Version
X-Fastly-Request-ID
Cache-Tag
X-Instart-Request-ID
Accept-Ch
X-TEC-API-ORIGIN
X-TEC-API-VERSION
X-Accel-Expires
X-TEC-API-ROOT
X-Version
AR-ATIME
AR-PoweredBy
AR-Request-ID
X-Server-Name
X-MSEdge-Ref
Access-Control-Request-Method
X-Grace
X-ESI
Nginx-Cache
Ar-Sid
AR-CACHE
X-Debug
X-Upstream
Charset
X-Powered-CMS
S
SPIisLatency
SPRequestDuration
X-FastCGI-Cache
Accept-Ch-Lifetime
X-SRCache-Store-Status
X-SRCache-Fetch-Status
SPRequestGuid
X-SharePointHealthScore
X-DynaTrace-JS-Agent
Realpath
X-Ezoic-Cdn
X-Client-IP
Content-MD5
X-Pinterest-Rid
Pinterest-Version
X-Trace
X-B3-TraceId-Primal
X-Mrf-Item-Lastmod
X-Element-Page-Cache
Mrf-Cache-Status
MRF-Tech
X-Mrf-Section-Lastmod
X-Dw-Request-Base-Id
X-Jurisdiction
X-Hp-Webp
X-Id
Nel
X-Recruiting
X-Shield-Request-Id
X-Amz-Meta-S3cmd-Attrs
X-Node-Name
X-T
Fastcgi-Cache
X-XRDS-Location
X-Content-Digest
X-Kinsta-Cache
X-Logged-In
X-ASPNET-VERSION
X-NWS-LOG-UUID
X-Mobile-URL
X-Request-Received
X-Frontend
X-Request-Processing-Time
X-FTR-Backend
X-FTR-Balancer
X-Country-Code-Real
X-Cache-Hit
Server-Node
X-FTR-Cache-Status
X-FTR-Backend-Server
X-Oneagent-Js-Injection
X-FTR-DC
X-FTR-Realm
Edge-Cache-Tag
X-Cache-Age
TP-L2-Cache
TP-Cache
X-FTR-Expires
X-Goog-Metageneration
Front-End-Https
X-Goog-Stored-Content-Length
X-Goog-Stored-Content-Encoding
X-Goog-Storage-Class
X-GUploader-UploadID
X-Goog-Generation
Server-Name
ServerID
X-Amzn-Trace-Id
X-Hostname
X-Cache-Key
DynaTrace
PB-PID
Arc-Version
Fastly-Restarts
PB-RID
X-Forwarded-For
X-Zen-Fury
Powered
X-DIS-Request-ID
X-Request-Handler-Origin-Region
X-Microsite
Backend-Timing
X-ATS-Timestamp
X-Content-Security-Policy-Report-Only
X-Revision
X-User-Agent
X-Hits
X-Akamai-Edgescape
X-Mobile-Rewrite
X-F-Cache
X-Page-Id
X-LB-Cache
Accept-Charset
X-HS-Content-Id
X-HS-Cache-Config
X-HS-Hub-Id
X-HS-Combine-CSS
X-Jobs
Filters
X-ORACLE-APMCS-TAG
X-ORACLE-APMCS-REQUEST-ID
X-Cdn
AMP-Access-Control-Allow-Source-Origin
X-Content-Powered-By
X-Yandex-Sdch-Disable
X-FTR-Cache-Host
X-Geo-Country
X-Kong-Proxy-Latency
X-Esi
X-Kong-Upstream-Latency
MicrosoftSharePointTeamServices
X-Origin-Server
X-Via-JSL
X-B
X-Varnish-Age
X-N
Alternate-Protocol
X-Correlation-Id
X-TTL
X-Rid
X-Daa-Tunnel
X-Ser
X-Erf-Bev-Bev
X-Erf-Bev-Bev-Is-Generated
Host-Header
X-Varnish-Backend
X-Ruxit-Js-Agent
X-Fastcgi-Cache
X-WebKit-CSP-Report-Only
X-ATG-Version
X-Az
X-Activity-Id
X-AppVersion
DC
Paypal-Debug-Id
Cache-Tags
X-Amz-Replication-Status
Retry-After
Actual-Object-TTL
X-FB-Debug
X-Debug-Info
X-Type
X-Git-Hash
X-App-Environment
Section-Io-Cache
Frame-Options
X-B-Cache
X-Signature
X-Whom
X-Varnish-Grace
X-App-Server
X-TT
X-Server-ID
X-Contextid
Surrogate-Key
X-Edge
X-Request-Guid
X-Status
Fastcgi-Useragent
X-Content-Options
Host
X-AOL-HN
Healthy
X-Cache-Action
X-Seen-By
X-Pinterest-Direct
X-RateLimit-Remaining
Source
X-XRDS-LOCATION
X-Host-Name
Refresh
X-IPLB-Instance
X-HTML-Minification-Powered-By
X-Endurance-Cache-Level
X-B3-Sampled
X-Tumblr-User
X-Tumblr-Pixel
X-Instance
X-Tumblr-Pixel-0
X-Upgrade-Enabled
From-Origin
Access-Control-Allow-Method
X-ECACHE
X-ProcessESI
X-Cache-Rule
X-Response-Served-From
X-Accel-Buffering
X-RemovedCookies
X-Cache-Operation
X-Amz-Apigw-Id
X-Drupal-Cache-Tags
X-Mid
X-Rule
X-Region
X-MCACHE
VIX-Pulpo-Upstream-Status
VIX-Pulpo-Node
Odigeo-Trace-Id
Payment
X-Environment-Context
MS-CV
X-Cacheable-TTL
X-L-Path
X-UUID
X-Amzn-RequestId
Eomportal-Instance
X-Cache-Time
X-Cache-Control
X-Varnish-Server
X-FW-Static
X-FW-Type
Datacenter
X-FW-Server
X-FW-Serve
X-Is-Bot
X-FW-Dynamic
X-Rendered-As
X-FW-Hash
X-Adobe-Loc
WPE-Backend
X-WA-Info
NR-ENABLED
X-Adobe-Content
Countrycode
Cache-Status
X-Protected-By
Xserver
Srv
X-SERVER-NAME
X-APP-VERSION
X-URL
X-PressLabs-Stats
X-GeoIP
Content-Disposition
X-Akamai-Transformed
X-Wix-Request-Id
X-Cluster
X-Time
NGB
X-EdgeConnect-Cache-Status
X-Cached-By
X-RequestSource
X-Cache-Server
X-VCache
X-Akamai-Request-ID2
X-Yottaa-Metrics
X-UnsetCookies
X-Correlation-ID
Uber-Trace-Id
X-Yottaa-Optimizations
X-Tt-Trace-Host
X-Tt-Trace-Tag
X-Origin-Response-Time
Version
X-Mode
X-Tumblr-Pixel-2
X-Load-Cache
X-Tumblr-Pixel-1
X-Proxy
X-IPS-LoggedIn
X-Mobile
X-Handled-By
Access-Control-Request-Headers
X-PHP-Backend
X-Unique-Id
X-Cache-Remote
Liferay-Portal
Filterid
X-FireWall-Port
X-Cache-Var-Map
X-Path-Route
X-Framework
X-RN-RSRV
Meta-Geo
X-Via-Fastly
Accept-Language
X-Viewer-Country
X-Cache-Var
X-Adobe-Source
X-UA-Device-Type
X-ES-SERVER
X-NGENIX-Cache
X-Backend-Name
X-Azure-Ref
X-CCM
X-Cache-Status-Check
Cross-Origin-Window-Policy
X-No-Session
DSUID
Decoy-Debug-Status
Decoy-Debug-Key
Decoy-Debug-TTL
X-Time-Microsecs
X-AWS-Id
X-Locale
X-LJ-Flow-ID
X-NewRelic-App-Data
X-MP-GENERATED-AT
X-Www-Served-By
X-Site-Version
X-Storage
X-OCL
X-PCL
X-PERF
Cache
Akamai-GRN
Cache-Hits
ServedBy
X-Cache-NGX
X-VWS-Id
X-Redis-Cache
X-ApacheServer
X-Pubstack
Cleartype
Cache-Name
X-FW-Version
X-Real-IP
X-R9-Blue-Green-Version
X-NCache
X-Info
X-RTag
X-Say-Cacheable
X-TX-ID
X-SayCDN-TTL
X-Web-Node
X-Say-TTL
X-Human
X-Cache-Config
Origin-Edge-Control
Origin-Cache-Control
Now
Ms-Operation-Id
Section-Io-Id
Section-Io-Origin-Status
Webserver
Section-Origin-Responded
Section-Io-Origin-Time-Seconds
Fastly-SSL
Mn-Server-Ip
Upgrade-Insecure-Requests
X-Cache-Enabled
Property-Id
X-BYPASS-REASON
X-CS
X-Device-Type
X-Hl-Ver
X-Format
X-FC-Vary-Parameters
S-Rt
X-Bc-Bl
TWC-Device-Class
TWC-GeoIP-Country
TWC-GeoIP-LatLong
TWC-Locale-Group
TWC-Connection-Speed
Webcakes-App-Name
X-Access
Webcakes-Region
Webcakes-App-Version
TWC-Privacy
X-NWS-UUID-VERIFY
X-Routing-Service
X-ProxyCache-Key
X-Section
X-ServerID
X-UPSTREAM-Address
X-Zipkin-Id
X-Proxied
X-ProxyCache-Status
X-Origin-Hint
X-Origin
X-Shopify-Stage
X-ShopId
X-ShardId
X-Amzn-Remapped-Content-Length
X-Alternate-Cache-Key
X-Sorting-Hat-PodId
X-JoinUs
X-Loop
X-TNCMS
X-Timing-Wait
X-Sorting-Hat-ShopId
X-CSRF-Token
X-BCube-Filmed-By
X-EIG-Tracking-Id
X-FB-TRIP-ID
X-Generated
X-Presslabs-Stats
X-Proxy-Build
X-Detected-As
X-From
X-Hyper-Cache
X-SaId
X-NYM-Debug-Backend
X-IP
X-Xfnlog-Site
Selected-Fe
DB-Nickname
Azure-InstanceId
X-Hosted-By
Azure-Version
Azure-RegionName
Azure-SiteName
Azure-SlotName
X-Varnish-Cache-Hits
X-Goog-Meta-Goog-Reserved-File-Mtime
X-Source
X-Content-Age
Country
Load-Balancing
X-PHP-Host
Ec-Rule-Version
X-Qloud-Router
X-Vcache
X-Labrador-Cache-Channel
Cache-Tv-Group
X-Cluster-Node
X-Cache-NE
SD-X-WS
X-Geo
X-Air-Hostname
X-Old-Content-Length
FilterID
X-Cache-Host
X-Varnish-Hostname
User-Agent
Time
X-Pad
X-Litespeed-Cache
X-Ua
X-Release
X-Backend-TTL
X-Drupal-Cache-Contexts
X-CDN-Forward
X-Cache-TTL-Remaining
X-EC-Lua
X-Parent-Response-Time
X-Cache-2
Locale
X-Urbn-Context-Path
X-Cache-Backend
X-Urbn-Site-Id
X-RCS-CacheZone
S-Cnection
X-RateLimit-Limit
Server-Info
X-FORWARDED-FOR
X-Akamai-Request-ID
X-Cache-Grace
X-Proxy-Cache-Status
X-Webkit-CSP
X-Forwarded-Host
X-Tumblr-Pixel-3
X-Microcachable
X-Debug-Cache
Proxy-Connection
NGX
X-Soup
X-NC
OT-Force-Account-Verify
Tracecode
X-Srv
X-SRV
Sid
Apigw-Requestid
X-Tb
X-UA
X-PAYTM-SRV-ID
X-Level-Front-Cache
X-NodeID
X-Proto
AsisCache
Arc-Country
X-Generated-On
X-Instart-Info
X-G
X-Geo-Header
X-CF-Lambda-Version
X-Aed
T-Server
True-Client-Country-4JS
ServerName
X-Application
X-B-Cookie
X-ARC
Server-Host
X-Accel-Expires-Debug
UCS
X-A-Dcw
X-A-Dam
X-A
X-A-Dgt
Who
Viewtype
VivaBuild
X-A-Wwc
Rendered-Blocks
Pagetype
X-DevSite-Last-Modified
GEO-REGION-INFO
X-Developer
X-Dispatch
Fastcgi-X-Cache-Version
X-External-Request-Id
Content-Script-Type
Content-Style-Type
X-Destination
X-Date
MD5-Digest
Meta-Geo-Continent
Mobile-Detection-Method
Machine
M-TraceId
X-D
X-Connection-Hash
X-CF-Lambda-Fn
BehaviorPad-Version
X-Uri
X-SRCache-Key
X-Processor
Cache-Key
X-Trace-Id
X-Session-Fingerprint
Xc-Version
X-S-Cookie
X-Scheme
X-ScT
X-ServiceProvider
X-Transaction
X-Vtex-Remote-Cache
X-Vdms-Version
Geo-Info
X-VG-WebServer
X-VG-WebCache
X-Vdms-Path
X-Twitter-Response-Tags
X-Trv-Group
X-Vtex-Processado-Em
X-Dc
X-S
X-Swa-Ws
X-Cluster-Name
X-Region-Sid
X-Rewrite-Enabled
X-A-Ccd
X-Rojux
X-Reqid
X-Magnolia-Registration
User-Cache-Control
Thinkindot-CacheControl-Type
X-Core-Value
X-Clara-WADP
X-Dispatcher-Server
X-Via-PopV
X-Cms-Context
X-Thanos
X-Ms-Version
X-Agile
X-Wikidot-Static-Cache
X-Device-Os
X-User
IsBot
Thinkindot-CacheControl
X-Wikidot-Backend
FNAC-ModuleRouting
X-Thinkindot-L3
X-Cache-FS-Status
On-Server
NM-Fastcgi-Cache
X-Cache-Bucket
Release
X-Bip
X-Block-Status
X-Branch-Name
N-Cache
X-Cache-Info
X-SN
X-WADP-Cache
X-Agile-Age
X-Owner
X-Agile-Id
X-TT-TIMESTAMP
Mail-Subject
Magicmarker
Kp-EeAlive
Thinkindot-Control
X-Cache-PHP
X-Via-PopH
X-SD-PageType
Web-Mar-Node
X-Hnp-Log
X-Generation-Time
We-Hiring
X-Vgn-Hpd-Reason
X-LAGOON
X-Micro-Cache
X-Ms-Request-Id
X-Method
X-Matched-Rule
X-Location
X-Logging-Id
AKAMAI
X-Hash
V-Age
X-Node-Id
Viewport
X-Fmm-Version
Vix-Hermes-Req-Id
CDCHOST
X-Worker
X-Skip-Cache
X-VC-Cache
X-SIPLIST1
X-Generated-In
GEO-INFO
X-Gen-Mode
X-Newrelic-Synthetics
Cf-Ipcountry
X-Hit
X-Envoy-Decorator-Operation
X-VG-TLSProxy
X-Varnish-Cacheable
X-VServer
X-Backend-Host
X-Req
X-Platform-Server
X-Variation
X-Auto-Login
X-Policy
X-Reboot
X-Clientip
X-Nginx-Cache-Key
X-Servername
X-Fastly-Cache
X-Eu-Site
X-Envoy-Upstream-Healthchecked-Cluster
X-Epic-Correlation-Id
X-RateLimit-Limit-Second
X-Has-Esi
X-Mvc-Supplant-Cachable
X-RateLimit-Remaining-Second
X-JWT-State
X-Is-Gdpr
X-Server-W
X-Irp-Debug
X-Slack-Backend
X-Distributor
X-Request-UUID
X-TrackingId
X-Cache-URL
X-Cache-Tags
X-BBXSRF
X-Request-Host
X-CGP
X-We-Are-Hiring
X-Response-By
X-Distil-CS
X-Origin-Date
X-Developers
X-Webstats-RespID
X-Origin-Expires
X-Backend-State
Wxu-Next-Hostname
HA-Ipaddr
Platform
Adler-Geo
Ha-Gx-Prefs
RNT-Machine
Apple-News-Services-Host
Apple-News-Services-Request-Url
Node
Fastly-Drupal-HTML
L5d-Success-Class
Is-Eu
Apple-News-Services-Parsed-Url
Memcached
C-Via
RNT-Time
Apple-News-Services-Handled
Sever-Int
Gh-Request-Id
Wxu-Next-Region
Cache-Cookie-Set-From
X-TA-CDN-Provider
Wxu-Next-Commit
Rt-Fastcgi-Cache
Cache-Cookie-Set-Idcheck
Server-Ext
Server-Hostname
Cache-Cookie-Set-Lfrom
X-DC
X-GoCache-CacheStatus
Fastly-SIE
X-Contensis-Viewer-Groups
Fastly-SWR
X-Core-Mission
X-TIME
X-LI-UUID
X-Varnish-Authentication
X-Var-Ttl
X-App
W
X-Rebelmouse-Surrogate-Control
X-Rebelmouse-Cache-Control
X-Li-Fabric
X-Li-Pop
X-Cache-ASPX
CacheControlHeader
Esi-Enabled
X-Nc
X-Be
X-Compress-Hint
X-Refresh
L
Server-ID
X-LI-Proto
X-Server-IP
Cache-Host
X-App-Name
Ohc-File-Size
X-Varnish-Beresp-Grace
X-Varnish-Beresp-Ttl
X-TH-Server
X-Varnish-Beresp-Status
X-CLOUD-TRACE-CONTEXT
X-Cache-Debug
X-Mvc-Supplant-OutputCached
X-Wa
LB
X-Loc
X-Gzip
X-Esi-Check
X-VCT
X-Cache-Id
X-AIR-PT
X-Origin-CC
X-Origin-TTL
X-ZONE
X-BC
X-Cdn-Srv
X-Sucuri-ID
HostName
X-Configured-By
X-S-Maxage
X-Storefront-Renderer-Rendered
NtCoent-Length
X-FPC
X-SVT-ORM-RULES
X-NU-AKA-ACS-Version
X-SVT-ORM-VERSION
X-Key
Server-Surrogate-Control
Server-Cache-Control
X-Generated-By
X-B3-Traceid
X-Edge-Location
Ohc-Response-Time
Memory
X-MSEdge-Features
X-MSEdge-Flight
X-Zone
X-Bc
MIME-Version
X-App-Version
X-Rocket-Nginx-Bypass
X-Varnish-Ttl
Pragrma
X-Varnish-URL
X-Cdn-Forward
X-CF-Powered-By
CACHE
Request-Country
Request-EU
Heartbleed
X-Debug-Panamera-Host
X-Svr
Referer-Policy
X-Debug-Panamera-Sitecode
X-Servedbyhost
Locid
X-Nginx-Cache
X-Varnish-Hits
X-GEO
X-Request-URI
X-Pjax-Url
X-Batcache
X-COUNTRY
Fastly-Backend-Name
Resin-Trace
X-Shopify-Generated-Cart-Token
X-Up
X-VCL-Version
FSS-Cache
X-BACKEND-TTL
SRV
X-Via-CDN
X-Minions-Version
WZWS-RAY
X-Gamma-Serve
X-BE
X-Aicache-OS
X-ND-Cache
Hostname
X-ElasticPress-Query
X-Sucuri-Cache
X-Ratelimit-Remaining
X-Amzn-Requestid
GeoIP-Country-Code
CF-Cached-On
Lfy
X-WebServer
X-CACHE-KEY
Geoip-Latitude
GeoIp-Country-Code
Cteonnt-Length
X-Oss-Server-Time
X-Oss-Object-Type
X-Oss-Request-Id
X-Oss-Hash-Crc64ecma
GeoIP-Latitude
Product
HitType
X-Proxy-Upstream
X-Check-Cacheable
X-Oss-Storage-Class
Mime-Version
X-ECache
X-Vcl-Version
DCR-Decision-By
DCR-Processing-Time-Ms
Powered-By-ChinaCache
Cdn-Host
X-Fetched-On
Cdn-Request-Time
X-Sn-Servicetimems
My-App
X-PJAX-URL
X-Cdn-Origin
X-Edge-Server
X-Unique-ID
X-GeoIP-Country-Code
X-NGINX-Cache
X-Azure-Ref-OriginShield
X-Fastly-Cache-Status
X-HS-Status
Pramga
Location
Ohc-Cache-HIT
X-CSRF-TOKEN
X-Fastly-Country-Code
X-PF-Uncompressing
X-Pf-Uncompressing
SN
X-ServedByHost
Amp-Access-Control-Allow-Source-Origin
X-LB-ID
X-Fastly-Backend-Reqs
X-Varnish-Url
X-Ratelimit-Limit
X-OVcl-Cache
X-OVcl
Group
PFcat
X-Request-Start
X-Served-From
X-VarnishDD-TTL
URI
X-CACHE-AGE
X-Vgn-Hpd-Cached
Dt-Cache-Category
X-Newrelic-App-Data
X-Vgn-Hpd-Ssi
Cdn
X-Fpc
X-B3-Spanid
X-Vgn-Hpd-Variations-Key
X-Shard
X-Swift-Error
X-B3-SpanId
X-Render-Time
X-Platform
X-Ratelimit-Reset
XServer
X-Via-Ucdn
X-Varnishpool
X-Instart-Isnd
X-Ftr-Cache-Host
A
X-Tec-Api-Root
Cf-Alt-Svc
X-Tec-Api-Origin
CloudFront-Viewer-Country
X-Request-Time
X-Tec-Api-Version
X-Via-NSCOPI
Country-Code
X-IN-APIGATEWAYSSL
X-Cache-Expired-At
WWW-Authenticate
X-IN-APIGATEWAY
X-Client-Ip
X-Debug-Cache-Store
X-Tb-Optimization-Total-Bytes-Saved
X-Varnish-Beresp-TTL
Origin
Geoip-City
X-DPWN-IS-SECURE
X-Debug-Cache-Fetch
X-Ocache
X-WPE-Loopback-Upstream-Addr
X-WR-MODIFICATION
Lb
PICS-Label
X-StackifyID
X-LiteSpeed-Cache-Control
X-Debug-Do-Not-Cache-Uri
X-Debug-Xas-Auth
X-Debug-Cache-String
X-Debug-Ysi-Auth
X-Debug-Cache-Status
Server-Ttl
X-Debug-Cache-Bypass
X-Apw-Access-Token
X-Planisys-CDN-Cache
Epwk-X-Cache
X-Planisys-CDN-Rules
X-WA
X-Amzn-Remapped-Connection
CF-IPCountry
X-Amzn-Remapped-Date
SID
X-C
X-Apw-Access-Action
X-Apw-Access-Object
X-CUA
Cloudfront-Viewer-Country
X-Planisys-CDN-TTL
X-Apw-Hits
X-Dw-Trace-Id
X-Sigma
X-Sigma-Backend
Pics-Label
X-Rocket-Build-Number
Region
X-Oss-Cdn-Auth
X-Acquia-Application-UUID
X-Cache-Hm
X-Cache-Hfrom
X-Country-IP
Host-ID
Request-Time
Proxy-Firewall
X-Cache-Tag
X-Acquia-Purge-Tags
X-Acquia-Site
X-Acquia-Application-Trace
X-Nananana
Cneonction
NnCoection
X-APP
Req-ID
X-Akamai-ERRuleID
X-B3-Parentspanid
X-DW
X-Akamai-ERPolicy
X-Li-Proto
X-RSL
X-RPS
X-RPM
X-DSS
X-DI
X-Action
TTL
X-SB
X-Html-Edge-Cache
X-Request-URL
X-DB
X-Varnish-ID
X-ElasticPress-Search
X-VC