Threat Level: green Handler on Duty: Brad Duncan

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
Link
Last-Modified
Cf-Request-Id
CF-Cache-Status
ETag
X-XSS-Protection
Accept-Ranges
Expect-CT
Pragma
X-Powered-By
CF-RAY
X-Cache
Via
Age
Content-Security-Policy
Report-To
NEL
Access-Control-Allow-Origin
Referrer-Policy
Content-Language
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-Cache-Hits
P3P
X-UA-Compatible
X-Served-By
CF-Ray
X-Download-Options
X-Xss-Protection
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Varnish
X-Request-Id
X-Adblock-Key
Access-Control-Allow-Credentials
X-FRAME-OPTIONS
X-Permitted-Cross-Domain-Policies
X-AspNet-Version
Alt-Svc
X-Request-ID
X-Runtime
Content-Security-Policy-Report-Only
X-Drupal-Cache
X-DNS-Prefetch-Control
X-Generator
X-Check
X-Cache-Status
X-Cacheable
Timing-Allow-Origin
X-Envoy-Upstream-Service-Time
X-Iinfo
X-Content-Security-Policy
X-Drupal-Dynamic-Cache
Feature-Policy
Content-Encoding
Access-Control-Expose-Headers
Status
Upgrade
X-AspNetMvc-Version
X-CDN
Access-Control-Max-Age
X-Via
Server-Timing
Request-Context
X-Robots-Tag
X-Turbo-Charged-By
X-UA-Device
X-Amz-Request-Id
X-Cache-Group
X-Dns-Prefetch-Control
X-Amz-Id-2
EagleId
X-Backend
X-AH-Environment
X-Proxy-Cache
P3p
Keep-Alive
X-Server
X-Ws-Request-Id
X-Age
Cf-Edge-Cache
Host-Header
X-Hacker
X-Vhost
X-Server-Powered-By
X-Rq
X-Varnish-Cache
X-Dispatcher
X-Amz-Version-Id
Grace
Allow
X-Swift-CacheTime
X-Swift-SaveTime
X-OneAgent-JS-Injection
Ali-Swift-Global-Savetime
X-LiteSpeed-Cache
X-WebKit-CSP
X-Page-Speed
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Ua-Compatible
Cf-Apo-Via
X-Device
Cf-Railgun
Accept-CH
X-Aws-Lambda-Call-Status
X-Node
X-Pingback
X-Server-Id
X-Host
X-Ruxit-JS-Agent
EagleEye-TraceId
Surrogate-Control
X-Nginx-Cache-Status
X-Akam-SW-Version
X-Readtime
Request-Id
X-Backend-Server
Accept-Ch-Lifetime
X-Content-Security-Policy-Report-Only
X-Cache-Lookup
X-HW
X-Cache-Spec
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-Cloud-Trace-Context
X-Trace
X-Response-Time
X-Application-Context
Permissions-Policy
X-Nginx-Upstream-Cache-Status
Fastly-Restarts
X-Edge
X-WebKit-CSP-Report-Only
X-Mod-Pagespeed
X-Litespeed-Cache
X-Country
Content-Location
X-Mcache
X-Content-Type
X-MS-InvokeApp
X-Clacks-Overhead
X-Url
Accept-CH-Lifetime
X-Vname
X-TtlSet
X-PC
X-CST
X-Midtier
X-Amz-Server-Side-Encryption
Rating
RTSS
Cache-Tag
X-Vcap-Request-Id
X-D2id
X-Rack-Cache
X-Element-Page-Cache
X-Cdn-Fetch
X-Exp-Id
X-Kinja
X-GoogleNews-Bot
X-Kinja-Build
X-Kinja-Server
X-Use-Magma
X-Exp-Variant
X-Kinja-Revision
Origin-Trial
Verso
X-VARITI-CCR
X-ESI
X-Server-Name
X-ECACHE
X-GitHub-Request-Id
X-Ac
Service-Worker-Allowed
X-Powered-By-Plesk
X-Amz-Rid
X-Cnection
SPRequestGuid
X-SharePointHealthScore
X-Navigation-Version
Xkey
X-Abt-Application-Version
X-Client-IP
SPRequestDuration
Edge-Control
SPIisLatency
X-Cache-TTL
X-Upstream
X-Ttl
Accept-Ch
X-B3-TraceId
Arr-Disable-Session-Affinity
X-Cached
X-Mg-S
X-Dw-Request-Base-Id
X-Erf-Bev-Bev
X-Browser-Type
X-Erf-Bev-Bev-Is-Generated
X-Server-Lifecycle-Phase
X-Instrumentation
X-Kraken-Loop-Name
X-Varnish-TTL
X-NWS-LOG-UUID
X-Px
Display
X-Middleton-Display
Pagespeed
X-Sol
X-SRCache-Fetch-Status
X-NF-Request-ID
X-SRCache-Store-Status
X-FastCGI-Cache
X-Forwarded-For
Access-Control-Request-Method
X-Cache-Key
Edge-Cache-Tag
X-Country-Code
X-Correlation-Id
X-Goog-Hash
X-Ser
X-Powered-CMS
X-Id
Content-MD5
AR-PoweredBy
X-Ratelimit-Limit
AR-ATIME
AR-Request-ID
AR-SID
Front-End-Https
AR-CACHE
X-Webkit-Csp
Public-Key-Pins
TCN
X-Version
X-Jurisdiction
X-HP-Webp
X-HP-Trace-Id
X-MSEdge-Ref
X-Amzn-Trace-Id
X-T
X-Recruiting
X-Content-Digest
X-RateLimit-Remaining
Response
X-Middleton-Response
X-Accel-Expires
TP-L2-Cache
TP-Cache
X-Shield-Request-Id
MicrosoftSharePointTeamServices
S
Nginx-Cache
Cache-Status
X-XRDS-Location
X-Fastcgi-Cache
X-Daa-Tunnel
X-Request-Received
X-Request-Processing-Time
X-HS-Hub-Id
X-HS-Cache-Config
X-HS-Content-Id
X-HS-Combine-CSS
Server-Node
Cache-Tags
Cross-Origin-Opener-Policy
X-Fastly-Request-ID
Mrf-Cache-Status
MRF-Tech
X-B3-TraceId-Primal
X-Distributor
X-Hits
X-TEC-API-VERSION
X-TEC-API-ROOT
X-Ratelimit-Remaining
X-TEC-API-ORIGIN
X-PressLabs-Stats
X-Edge-Location-Klb
X-Kinsta-Cache
X-LB-Cache
X-Origin-Server
X-Ua-Browser
X-Ratelimit-Reset
X-Ezoic-Cdn
Alternate-Protocol
Fastcgi-Cache
Filterid
X-ORACLE-DMS-RID
X-ORACLE-DMS-ECID
X-Grace
X-Frontend
X-LLID
X-Microsite
X-Request-Handler-Origin-Region
X-Rid
X-DIS-Request-ID
Server-Name
X-Hostname
X-Logged-In
Healthy
X-FB-Debug
X-Geo-Country
X-Varnish-Backend
X-Git-Hash
X-Www-Served-By
Realpath
Cleartype
X-NGENIX-Cache
X-Debug-Info
X-Page-Id
X-Load-Cache
X-Cluster-Name
Payment
DC
X-TTL
X-Protected-By
X-Forwarded-Proto
MS-Author-Via
Access-Control-Allow-Method
Content-Disposition
X-Origin-Cache
X-ASPNET-VERSION
X-ECache
X-DataDome
Charset
X-B3-Sampled
X-Upgrade-Enabled
X-Goog-Metageneration
X-GUploader-UploadID
X-Kong-Upstream-Latency
X-AppVersion
X-Activity-Id
X-Az
X-Kong-Proxy-Latency
X-Proxy
X-Seen-By
Count-Hit
X-F-Cache
X-Amz-Replication-Status
X-Times
X-Amz-Meta-S3cmd-Attrs
Cross-Origin-Resource-Policy
X-Fb-Rlafr
X-Azure-Ref
X-Whom
Paypal-Debug-Id
X-Revision
X-B
Surrogate-Key
X-Contextid
X-Type
X-App-Environment
Viewport
X-Route-Name
X-Aspnet-Duration-Ms
X-Akamai-Edgescape
X-Providence-Cookie
X-Request-Guid
Accept-Charset
X-Is-Crawler
X-Flags
X-Cache-Age
X-Wix-Request-Id
X-Varnish-Server
X-TT
Retry-After
X-B3-Traceid
X-Hosted-By
X-Aspnetmvc-Version
X-B-Cache
X-Signature
X-DynaTrace
X-Language
X-Envoy-Decorator-Operation
X-Cache-Control
X-Source
X-App-Server
X-Mobile
Amp-Access-Control-Allow-Source-Origin
X-Varnish-Grace
X-Oracle-Dms-Ecid
X-Magnolia-Registration
X-Oracle-Dms-Rid
X-Goog-Stored-Content-Length
X-Goog-Stored-Content-Encoding
X-Goog-Storage-Class
X-Goog-Generation
X-VCache
Version
Host
WPO-Cache-Message
WPO-Cache-Status
Referer-Policy
X-XRDS-LOCATION
Refresh
X-N
X-Cache-Rule
X-HTML-Minification-Powered-By
X-Server-ID
X-Original-Request-Id
X-Tumblr-Pixel
X-Varnish-Age
X-Tumblr-Pixel-1
X-Cache-Time
X-Tumblr-User
Access-Control-Request-Headers
X-Response-Served-From
X-Tumblr-Pixel-0
X-Amz-Apigw-Id
X-Amzn-RequestId
X-EdgeConnect-Cache-Status
X-Cache-Status-Check
X-Rule
X-UUID
X-RTag
X-G
X-Jobs
X-Framework
X-Cacheable-TTL
Ms-Operation-Id
Protected
X-Cache-Grace
MS-CV
X-Content-Powered-By
SD-X-WS
X-FW-Hash
X-FW-Server
X-FW-Static
X-FW-Type
X-FW-Dynamic
X-Environment-Context
X-Backend-Name
X-Device-Type
Section-Io-Cache
X-FW-Version
X-FW-Serve
X-ProcessESI
X-RemovedCookies
X-L-Path
X-User-Agent
VIX-Pulpo-Node
VIX-Pulpo-Upstream-Status
NGB
From-Origin
GEO-INFO
X-Tt-Trace-Tag
X-Tt-Trace-Host
X-Status
Akamai-GRN
X-Page-View
CDN-RequestId
X-Instance
X-NYM-Debug-Backend
X-Rendered-As
X-Adobe-Loc
X-Drupal-Cache-Tags
X-Drupal-Cache-Contexts
X-Cache-Expired-At
X-Is-Bot
X-Adobe-Content
X-Http-Reason
X-Nginx-Cache
X-Varnish-Ttl
X-Region
Front
X-Akamai-Request-ID2
X-Trace-Id
Url
X-Servername
X-Unique-Id
X-Fastly-Request-Id
X-Pinterest-Rid
Pinterest-Version
Pinterest-Generated-By
Accept-Language
Liferay-Portal
X-Content-Options
SRV
X-Debug-IsConnected
X-Debug-IsPreview
Backend
Fastly-SWR
X-Template
X-Newrelic-App-Data
Fastly-SIE
X-Zen-Fury
X-Cache-Hit
X-CDN-Forward
X-RateLimit-Limit
X-Air-Hostname
X-Air-Trace-Id
X-Air-Source
X-Yottaa-Metrics
X-Yottaa-Optimizations
X-DynaTrace-JS-Agent
X-Time
Country
X-Mode
Content-Secure-Policy
X-Rocket-Nginx-Serving-Static
X-Cache-Operation
Node
X-Uri
S-Rt
X-IPS-LoggedIn
X-Generation-Time
X-Content-Age
X-UPSTREAM-Address
X-Cache-Server
X-Edge-Location
X-Rewrite-Enabled
X-RN-RSRV
Meta-Geo
Filters
X-COUNTRY
X-Tumblr-Pixel-2
Webserver
Onion-Location
X-Web-Node
CF-IPCountry
Uber-Trace-Id
X-Tumblr-Pixel-3
X-ARC
Cache-Hits
Azure-SiteName
Selected-Fe
X-Timing-Wait
Azure-SlotName
X-Amzn-Remapped-Content-Length
X-Locale
Azure-Version
Azure-RegionName
X-Proxy-Cache-Info
X-PHP-Backend
Azure-InstanceId
X-Proxy-Build
X-Tb
X-BYPASS-REASON
X-Cms-Context
X-Cache-Action
X-Skip-Cache
Cache-Name
WP-Super-Cache
X-PHP-Host
X-Labrador-Cache-Channel
X-Origin-Date
X-Say-Cacheable
X-Proto
X-Via-Fastly
X-Ua
X-Say-TTL
Countrycode
X-SayCDN-TTL
X-ProxyCache-Status
X-Server-W
X-Site-Version
X-Soup
X-ProxyCache-Key
X-Sucuri-ID
X-Sucuri-Cache
TWC-Locale-Group
Property-Id
ServerID
TWC-Connection-Speed
TWC-Device-Class
TWC-GeoIP-Country
TWC-GeoIP-LatLong
X-Format
X-UA-Device-Type
X-Reqid
X-Origin-Hint
X-Sql-Duration-Ms
X-Routing-Service
X-Zipkin-Id
X-Proxied
X-Varnish-Beresp-Grace
X-Ms-Request-Id
X-VC-Cache
X-Ms-Version
X-Handled-By
X-Sql-Count
X-Cache-Host
X-Access
Webcakes-Region
Webcakes-App-Version
X-Cluster-Node
X-Debug
X-Forwarded-Host
X-Extlb
X-Section
X-Proxy-Cache-Status
Webcakes-App-Name
TWC-Privacy
X-Real-IP
X-SaId
DB-Nickname
ServedBy
Cache-Tv-Group
X-Adobe-Source
X-JoinUs
Web-Mar-Node
X-IPLB-Instance
Cross-Origin-Window-Policy
X-LAGOON
X-IPLB-Request-ID
X-App-Version
X-FB-TRIP-ID
X-R9-Blue-Green-Version
X-Optimistic-Header
X-Urbn-Site-Id
X-Cluster
X-LJ-Flow-ID
X-VWS-Id
X-Detected-As
X-Cache-TTL-Remaining
X-Urbn-Context-Path
X-No-Session
Locale
X-AWS-Id
Mn-Server-Ip
Apigw-Requestid
X-URL
X-LSADC-Cache
Fastcgi-Useragent
X-GeoCountry
X-GeoCode
X-Node-Name
X-WP-CF-Super-Cache-Cache-Control
X-Director
X-Xfnlog-Site
X-Ruxit-Js-Agent
X-WP-CF-Super-Cache
Mime-Version
X-Tt-Logid
Source
X-Varnish-Hits
Frame-Options
Upgrade-Insecure-Requests
X-Oneagent-Js-Injection
X-TIME
X-GEO
CDN-Cache
X-Generated-By
CDN-EdgeStorageId
X-Hl-Ver
CDN-CachedAt
CDN-RequestCountryCode
CDN-Uid
CDN-PullZone
X-Buckets
Fastly-Drupal-HTML
X-Mg-Request-UUID
X-Varnish-Cache-Hits
X-Request-Time
X-Tec-Api-Version
X-Tec-Api-Origin
Load-Balancing
X-Tec-Api-Root
X-FireWall-Port
Xet-Cookie
X-ServerID
X-Varnish-Hostname
X-Redis-Cache
X-Datadog-Sampling-Priority
X-Datadog-Sampled
X-Datadog-Parent-Id
X-Origin-CC
X-Origin-TTL
X-SRV
X-Datadog-Trace-Id
X-RM-Cache-TTL
X-Loop
X-Cdn
X-Api-Version
X-TA-CDN-Provider
X-Cache-Debug
CF-Cached-On
X-Akamai-Transformed
X-Sorting-Hat-ShopId
X-Storefront-Renderer-Rendered
X-Sorting-Hat-PodId
X-Tx-Id
X-ShopId
X-ShardId
X-Served-From
X-Alternate-Cache-Key
X-Shopify-Stage
X-Pubstack
X-Storage
X-Pass-Why
X-Endurance-Cache-Level
X-Newrelic-Synthetics
X-Request-Host
Xserver
Server-Info
X-Restarts
X-Service
X-Provided-By
Thinkindot-CacheControl
A
T-Server
BehaviorPad-Version
TDXMobile
Thinkindot-CacheControl-Type
Origin
MD5-Digest
Memcached
DCR-Processing-Time-Ms
Meta-Geo-Continent
Lang
Host-ID
Edge-Cache
DSUID
Gannett-Cam-Experience-Id
Ngx.Var.Host
DCR-Decision-By
Release
Rendered-Blocks
Server-Host
Sslversion
Redirect-Candidate
Cache-Host
Candidate-Md5Url
Odigeo-Trace-Id
Thinkindot-Control
Surrogated-Key
X-Core-Mission
X-Origin-Time
X-Origin
X-Processor
X-Rojux
X-S-Cookie
X-S
X-Nyt-Route
X-Mobile-URL
X-Level-Front-Cache
X-INCAP-ABP
X-Loc
X-Men
X-Mid
X-S-Maxage
X-ScT
X-Vdms-Path
X-TIM-N
X-Vdms-Version
X-We-Are-Hiring
Xc-Version
X-Thinkindot-L3
X-Thanos
X-SRCache-Key
X-Sn-Servicetimems
X-SVT-ORM-RULES
X-SVT-ORM-VERSION
X-Test
X-Generated-On
X-Gdpr
X-B-Cookie
X-Application
X-Bc-Bl
X-BCube-Filmed-By
X-Bip
X-Akamai-Device-Characteristics
X-Aed
X-A-Ccd
X-A
X-A-Dam
X-A-Dcw
X-A-Dgt
X-Cache-Date
X-Cache-Info
X-Ec-Fail
X-Developer
X-Ec-GeoHdr
X-Epic-Correlation-Id
X-External-Request-Id
X-Destination
X-D
X-Cdn-Origin
X-Cache-NE
X-CMSURLCustom
X-Conf
X-CUA
WWW-Authenticate
X-A-Wwc
X-CSRF-Token
X-WP-CF-Super-Cache-Active
X-TNCMS
X-Location
X-Ec-Custom-Error
X-CACHE-AGE
X-Dispatcher-Server
X-Dispatcher-Number
X-DefElseHash
X-DefHash
X-Esi-Check
X-GeoIP-City
X-Gzip
X-Has-Esi
X-Geo-Header
X-Gamma-Serve
X-Fastly-Backend
X-Fastly-Cache
X-Fetched-On
X-Date
X-CacheTTL
Tube-Get-Contents
Tube-Got-Eval
Tube-Got-Results
Req-Svc-Chain
Platform
Magicmarker
Mail-Subject
NM-Fastcgi-Cache
Tube-Return
We-Hiring
X-Cache-Bucket
X-Cache-Id
X-Correlation-ID
X-BBC-Edge-Cache-Status
X-Auto-Login
X-Accel-Expires-Debug
X-Ad-Defer-Variation
X-Hash
X-Human
X-Slack-Backend
X-Slack-Shared-Secret-Outcome
X-Var-Ttl
X-Sigma-Backend
X-Sigma
X-SD-PageType
X-Server-IP
X-Variation
X-Varnish-CookieHashed-On
X-VServer
X-Worker
X-Response-By
X-Vmg-Version
X-Varnishpool
X-Varnish-CookieINHashed-On
X-Varnish-Remaining-TTL
X-Scale
X-Air-Pt
X-Node-Id
X-Org
X-Origin-Expires
X-Mvc-Supplant-Cachable
X-JWT-State
Section-Io-Id
X-Is-Gdpr
X-Origin-Response-Time
X-Platform
X-Region-Sid
X-Req
X-Rocket-Build-Number
X-Pool
X-Platform-Router
X-Platform-Cluster
X-Platform-Processor
X-HS-Content-Campaign-Id
X-Httpd
Cmsid
C-Via
Cmstype
Country-Code
Cache-Key
CacheControlHeader
Gh-Request-Id
Click-Count-Action-Start
Click-Count-Error
CloudFront-Viewer-Country
AKAMAI
Adler-Geo
Is-Eu
Section-Io-Origin-Status
Section-Origin-Responded
Fastly-Backend-Name
Fastly-GeoIP-CountryCode
Section-Io-Origin-Time-Seconds
HostName
Environment
X-Clara-WADP
X-App
X-Ckpd-Fst-Backend
X-Cdn-Srv
X-Fmm-Version
X-FC-Vary-Parameters
X-Azure-Ref-OriginShield
X-Forwarded-Site
X-Cache-Tags
Datacenter
X-Core-Value
X-DPWN-IS-SECURE
X-Cache-FS-Status
X-Developers
Canary
X-Planisys-CDN-Rules
X-Planisys-CDN-Cache
X-Owner
X-WA-Info
X-Planisys-CDN-TTL
X-Qloud-Router
X-V-Cache
X-Varnish-Beresp-Status
X-Vcl-Version
X-Release
X-WADP-Cache
X-NodeID
X-Accel-Buffering
X-GeoIP-Region-Code
X-GeoIP-Country-Code
X-GeoIP
X-Instance-Name
X-Irp-Debug
X-Nginx-Cache-Key
X-Wix-Viewer-Type
Expect-Staple
X-Mly-Id
X-Frame-Option
X-Device-Os
Machine
State
Vix-Hermes-Req-Id
Producers
Origin-EX
On-Server
Origin-CC
Web-Mar-Region
X-Varnish-Beresp-Ttl
Ssr
X-Via-CDN
X-Minions-Version
X-SB
X-FL-EDGE
X-FL-QIT-DEBUG
Apple-News-Services-Parsed-Url
X-NCache
PFcat
Apple-News-Services-Request-Url
Sever-Int
X-Gen-Mode
Server-Hostname
Locid
Srvid
Cache-Provider
X-Hnp-Log
X-HN
Server-Ext
X-Block-Status
X-Aicache-OS
X-Request-Start
X-VG-TLSProxy
X-Old-Content-Length
X-VarnishDD-TTL
L
Wxu-Next-Commit
Wxu-Next-Hostname
Wxu-Next-Region
X-Zone
X-Platform-Server
User-Cache-Control
NGX
Apple-News-Services-Handled
Apple-News-Services-Host
Kp-EeAlive
X-Op-Id-All
Edge-Copy-Time
X-Parent-Response-Time
X-Via-SSL
X-Via-Edge
X-Eu-Site
X-Nananana
X-Mvc-Supplant-OutputCached
Ha-Gx-Prefs
X-Microcachable
X-From
HA-Ipaddr
L5d-Success-Class
CDCHOST
X-Esi
Fastly-SSL
X-Ua-Device
X-CGP
X-Csrf-Jwt
X-Cache-Remote
X-Webkit-CSP-Report-Only
X-VC
X-Up
X-B3-Spanid
X-LB-NoCache
X-Cache-Enabled
X-Refresh
X-Client-Ip
Pics-Label
Env
X-Tb-Optimization-Total-Bytes-Saved
X-Dc
X-DC
X-Debug-Cache-Store
X-Cache-Backend
X-Lambda-Id
X-RCS-CacheZone
X-Debug-Cache-Fetch
X-VCT
GeoIP-Latitude
X-ND-Cache
Decoy-Debug-TTL
X-Via-Popn
X-Via-Poph
Decoy-Debug-Key
X-Cached-By
Decoy-Debug-Status
Cluster
X-Via-Popv
X-Generated-In
Sid
NtCoent-Length
X-Trace-ID
X-B3-SpanId
CPC-Cache
X-Render-Time
X-NWS-UUID-VERIFY
X-Tid
Cache
X-Vtex-Remote-Cache
VNS-Cache
CPC-Age
VNS-Age
X-Upstream-Ct
X-Cs
AMP-Access-Control-Allow-Source-Origin
SID
X-Upstream-Ht
Memory
Fastly-Drupal-Html
X-Edge-Pop
X-HA-Backend
X-LB-ID
X-HS-Status
X-CCDN-CacheTTL
X-Hcs-Proxy-Type
X-CCDN-Origin-Time
Time
X-Cache-Type
X-Webkit-CSP
X-Servedbyhost
X-DataCenter
X-TH-Server
X-Srv
X-Presslabs-Stats
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Cdn
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True-Client-IP
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XServer
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Cdncip
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Cdnsip
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XM
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Ngx
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