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