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