Threat Level: green Handler on Duty: Russ McRee

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
X-XSS-Protection
X-Powered-By
Pragma
CF-Cache-Status
CF-RAY
Link
ETag
Expect-CT
Via
X-Cache
Age
Content-Security-Policy
Access-Control-Allow-Origin
Content-Language
P3P
X-Cache-Hits
X-UA-Compatible
X-Amz-Cf-Pop
X-Amz-Cf-Id
Referrer-Policy
X-Served-By
X-Varnish
Alt-Svc
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Request-Id
X-Download-Options
X-AspNet-Version
Access-Control-Allow-Credentials
X-Runtime
X-Drupal-Cache
X-Adblock-Key
X-Check
X-Cache-Status
X-Generator
Content-Security-Policy-Report-Only
X-Permitted-Cross-Domain-Policies
X-Cacheable
X-Request-ID
X-Template
X-Language
X-DNS-Prefetch-Control
Timing-Allow-Origin
X-Iinfo
X-AspNetMvc-Version
X-Buckets
X-FRAME-OPTIONS
Status
X-Content-Security-Policy
X-CDN
Upgrade
Content-Encoding
Access-Control-Expose-Headers
X-Ua-Compatible
Access-Control-Max-Age
X-Kinja-Server-Push
Keep-Alive
X-Xss-Protection
X-Turbo-Charged-By
X-Drupal-Dynamic-Cache
Xkey
X-Pass-Why
X-Cache-Group
X-AH-Environment
P3p
X-Envoy-Upstream-Service-Time
CF-Ray
X-Backend
X-Via
X-Age
X-Server
X-Amz-Request-Id
X-Amz-Id-2
X-Robots-Tag
X-Server-Powered-By
X-Page-Speed
X-Pingback
X-Ws-Request-Id
EagleId
X-Proxy-Cache
X-Nginx-Cache-Status
X-Hacker
X-UA-Device
Request-Context
X-Varnish-Cache
Feature-Policy
Server-Timing
Grace
Cf-Railgun
X-Swift-SaveTime
X-Swift-CacheTime
Ali-Swift-Global-Savetime
X-Amz-Version-Id
Report-To
X-LiteSpeed-Cache
X-Rq
X-Styx-Req-Id
X-Pantheon-Styx-Hostname
X-Dns-Prefetch-Control
X-WebKit-CSP
X-Server-Id
X-Host
X-Device
X-OneAgent-JS-Injection
EagleEye-TraceId
X-Origin-Cache
X-Response-Time
Content-Location
X-Node
X-Ac
Surrogate-Control
X-Vhost
X-Readtime
Request-Id
X-Cloud-Trace-Context
X-Backend-Server
X-Dispatcher
X-Origin-Upstream-Status
X-Cnection
X-Application-Context
X-HW
X-ORACLE-DMS-ECID
Fusion-Template-Id
Fusion-Content-Source
Fusion-Source
Fusion-Component-Id
Fusion-Content-Id
X-Cache-Lookup
X-DataDome
X-ORACLE-DMS-RID
NEL
X-Mod-Pagespeed
X-Rack-Cache
Edge-Control
Rating
X-Country
X-Ruxit-JS-Agent
X-Akam-SW-Version
X-Clacks-Overhead
Pinterest-Generated-By
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
Allow
X-DynaTrace
X-Country-Code
X-Instart-Request-ID
X-Varnish-TTL
X-TTL
X-FTR-Request-ID
X-Goog-Hash
Accept-Ch
X-Vname
X-PC
X-TtlSet
X-ESI
Verso
X-Powered-By-Plesk
Service-Worker-Allowed
X-Url
Content-MD5
Accept-Ch-Lifetime
X-Forwarded-Proto
X-Version
X-MS-InvokeApp
X-B3-TraceId
X-Use-Magma
X-Kinja-Build
X-Kinja-Revision
X-Kinja
X-GoogleNews-Bot
X-Exp-Variant
X-Cdn-Fetch
X-Kinja-Server
X-GitHub-Request-Id
X-Exp-Id
Edge-Cache-Tag
RTSS
AR-PoweredBy
Ar-Sid
AR-ATIME
AR-Request-ID
AR-CACHE
X-Px
X-D2id
X-Debug
X-Abt-Application-Version
X-Server-Name
SPRequestGuid
X-Amz-Server-Side-Encryption
Charset
X-NF-Request-ID
X-Cached
X-Vcache
X-Accel-Expires
X-MSEdge-Ref
Pagespeed
X-Middleton-Display
X-Middleton-Response
X-Sol
Display
Response
X-Amz-Rid
Arr-Disable-Session-Affinity
X-Vcap-Request-Id
X-Navigation-Version
X-Powered-CMS
X-SharePointHealthScore
X-TEC-API-ORIGIN
X-TEC-API-ROOT
X-TEC-API-VERSION
Pinterest-Version
X-Pinterest-Rid
TCN
X-Fastcgi-Cache
X-Trace
X-SRCache-Fetch-Status
X-SRCache-Store-Status
Realpath
X-VARITI-CCR
Public-Key-Pins
X-Client-IP
Cache-Tag
X-Cdn
Access-Control-Request-Method
X-Ser
MS-Author-Via
S
X-DynaTrace-JS-Agent
X-Fastly-Request-ID
X-Upstream
X-Shard
Nginx-Cache
SPRequestDuration
SPIisLatency
X-Id
X-Server-ID
Mrf-Cache-Status
MRF-Tech
X-Mrf-Section-Lastmod
X-B3-TraceId-Primal
X-Mrf-Item-Lastmod
X-Ezoic-Cdn
X-Hp-Webp
X-Content-Type
X-Forwarded-For
X-Amzn-Trace-Id
X-T
X-Amz-Meta-S3cmd-Attrs
X-Grace
DynaTrace
Front-End-Https
X-Recruiting
X-Edge-O15-RID
X-Hits
Fastcgi-Cache
Nel
X-Varnish-Age
X-Aspnet-Version
ServerID
MicrosoftSharePointTeamServices
X-Dw-Request-Base-Id
X-DIS-Request-ID
X-Node-Name
X-Mobile-URL
X-Cache-TTL
NR-ENABLED
X-Content-Digest
X-Element-Page-Cache
X-Country-Code-Real
X-FTR-Expires
X-FTR-Cache-Status
X-HS-Cache-Config
X-HS-Combine-CSS
X-HS-Content-Id
X-HS-Hub-Id
Powered
X-Frontend
X-Goog-Stored-Content-Encoding
X-Goog-Stored-Content-Length
X-Jurisdiction
X-GUploader-UploadID
X-FTR-DC
X-FTR-Realm
X-Goog-Storage-Class
X-FTR-Backend
X-FTR-Backend-Server
X-Goog-Generation
X-FTR-Balancer
X-Goog-Metageneration
Alternate-Protocol
Server-Name
Server-Node
TP-Cache
TP-L2-Cache
X-Logged-In
X-Correlation-Id
AMP-Access-Control-Allow-Source-Origin
X-Request-Processing-Time
X-Request-Received
X-Microsite
X-Request-Handler-Origin-Region
Upgrade-Insecure-Requests
Backend-Timing
X-ATS-Timestamp
X-Amzn-RequestId
X-Cache-Hit
X-XRDS-Location
X-Content-Options
X-Webkit-Csp
X-Amz-Apigw-Id
Refresh
X-Page-Id
X-Content-Security-Policy-Report-Only
X-Origin-Server
X-User-Agent
X-Rid
X-Revision
X-Akamai-Edgescape
X-Varnish-Grace
X-F-Cache
X-Type
X-XRDS-LOCATION
X-CST
Fastly-Restarts
X-Zen-Fury
X-Content-Powered-By
X-Shield-Request-Id
X-LB-Cache
X-B3-Sampled
X-Geo-Country
X-B
X-AppVersion
X-Activity-Id
X-Az
X-FTR-Cache-Host
X-N
PB-PID
X-Webapp-Samesite-None-Activated-N
X-URL
PB-RID
Arc-Version
X-Mobile-Rewrite
X-Pad
Cache-Status
X-Kinsta-Cache
X-TT
X-WebKit-CSP-Report-Only
X-Instance
X-Debug-Info
X-Cache-Age
Actual-Object-TTL
X-Tumblr-Pixel
X-Tumblr-Pixel-0
X-AOL-HN
Paypal-Debug-Id
X-Tumblr-User
X-App-Environment
X-Request-Guid
X-Framework
X-Signature
X-B-Cache
X-Jobs
X-Analytics
X-Cache-Action
DC
X-PHP-Backend
Access-Control-Allow-Method
X-RateLimit-Remaining
X-Load-Cache
X-Time
X-FB-Debug
X-Git-Hash
X-Cached-By
X-Varnish-Backend
Surrogate-Key
X-Erf-Bev-Bev-Is-Generated
Fastcgi-Useragent
X-Erf-Bev-Bev
X-Tt-Trace-Tag
Host-Header
X-Amz-Replication-Status
X-Tt-Trace-Host
X-IPLB-Instance
X-Contextid
MS-CV
X-SS-Set-Cookie
FilterID
X-Cache-Key
X-ATG-Version
X-Ruxit-Js-Agent
X-WA-Info
Tracecode
Accept-CH
X-Cluster
Host
X-Accel-Buffering
X-Response-Served-From
NGB
X-Srv
WPE-Backend
X-Mobile
X-Kong-Upstream-Latency
Source
Payment
X-FastCGI-Cache
X-Kong-Proxy-Latency
X-Cache-NE
X-Host-Name
X-FW-Serve
X-FW-Static
Frame-Options
X-Varnish-Server
X-Cache-2
X-FW-Server
X-FW-Type
X-FW-Hash
X-Cache-Rule
X-Cache-Operation
Cache-Tv-Group
X-VCache
X-Region
X-IPS-LoggedIn
X-Tumblr-Pixel-2
Eomportal-Instance
X-ORACLE-APMCS-TAG
X-ORACLE-APMCS-REQUEST-ID
X-Cache-Enabled
X-Tumblr-Pixel-1
X-Via-JSL
Filters
X-Adobe-Content
X-Is-Bot
X-B3-Traceid
X-Cacheable-TTL
X-GeoIP
X-Rendered-As
X-Adobe-Loc
X-Varnish-Hostname
X-Presslabs-Stats
X-RequestSource
X-Ttl
X-TX-ID
X-NewRelic-App-Data
X-Origin-Response-Time
X-Hostname
Xserver
X-NWS-LOG-UUID
X-EdgeConnect-Cache-Status
X-Seen-By
Retry-After
Cleartype
Accept-CH-Lifetime
X-Cache-TTL-Remaining
Server-Info
Cache
X-ProcessESI
X-RemovedCookies
X-UA
X-HTML-Minification-Powered-By
X-Dc
Liferay-Portal
X-RTag
X-Cache-Control
Ms-Operation-Id
Datacenter
X-Source
Healthy
X-FireWall-Port
X-Environment-Context
X-L-Path
X-Upgrade-Enabled
X-Endurance-Cache-Level
X-Cache-Server
From-Origin
X-App-Server
X-RateLimit-Limit
X-Handled-By
X-CACHE-KEY
X-Rule
X-Status
X-APP-VERSION
Version
X-Backend-Name
X-PressLabs-Stats
X-Wix-Request-Id
X-Cache-Var
X-Path-Route
X-RN-RSRV
X-Cache-Var-Map
Meta-Geo
X-ES-SERVER
X-Proxy-Build
X-Section
Selected-Fe
X-Access
X-Timing-Wait
X-Tb
X-Request-Time
X-Format
Azure-SiteName
Azure-SlotName
X-PCL
Azure-Version
OT-Force-Account-Verify
X-Origin
Azure-RegionName
X-OCL
X-Storage
X-BYPASS-REASON
X-Content-Age
X-Proto
X-ProxyCache-Key
X-Akamai-Request-ID
Mn-Server-Ip
Akamai-GRN
X-ProxyCache-Status
X-Human
Azure-InstanceId
Cache-Tags
Srv
X-Cache-Host
X-Cache-Config
X-AWS-Id
X-Alternate-Cache-Key
X-Cluster-Node
X-Debug-Cache
X-Generated-By
X-FW-Dynamic
X-FC-Vary-Parameters
X-EIG-Tracking-Id
X-Akamai-Request-ID2
S-Rt
Ec-Rule-Version
Decoy-Debug-TTL
Decoy-Debug-Status
Decoy-Debug-Key
NGX
Node
Origin-Edge-Control
Origin-Cache-Control
Now
X-Hl-Ver
X-MP-GENERATED-AT
X-Soup
X-Sorting-Hat-ShopId
X-Sorting-Hat-PodId
X-Shopify-Stage
X-Time-Microsecs
X-UUID
X-Web-Node
X-VWS-Id
X-Viewer-Country
X-Vgn-Hpd-Reason
X-Shopify-Generated-Cart-Token
X-ShopId
X-Proxy-Cache-Status
X-Proxy
X-NYM-Debug-Backend
DB-Nickname
X-Pubstack
X-Qloud-Router
X-ShardId
X-ServerID
X-Redis-Cache
X-LJ-Flow-ID
X-Goog-Meta-Goog-Reserved-File-Mtime
GEO-INFO
X-Yottaa-Metrics
X-Yottaa-Optimizations
Webcakes-Region
TWC-GeoIP-LatLong
X-Trafficlayer-App-Name
X-Hosted-By
X-Hyper-Cache
X-JoinUs
TWC-Locale-Group
TWC-GeoIP-Country
X-Trafficlayer-App-Scope
TWC-Privacy
TWC-Connection-Speed
X-BCube-Filmed-By
Property-Id
X-Locale
X-CCM
TWC-Device-Class
X-IP
X-SaId
X-Say-Cacheable
X-Site-Version
X-Say-TTL
X-SayCDN-TTL
X-Www-Served-By
Webcakes-App-Name
Webcakes-App-Version
X-RCS-CacheZone
X-Origin-Hint
X-Akamai-Transformed
X-Xfnlog-Site
X-Amzn-Remapped-Content-Length
X-Varnish-Hits
X-Detected-As
X-FB-TRIP-ID
X-R9-Blue-Green-Version
X-Loop
X-TNCMS
X-Generated
Accept-Charset
L5d-Success-Class
Cross-Origin-Window-Policy
X-Oneagent-Js-Injection
Cache-Name
X-NCache
Viewport
Uber-Trace-Id
X-CS
X-Unique-Id
X-Drupal-Cache-Tags
Webserver
Time
Cache-Key
X-UA-Device-Type
X-Esi
X-Cache-Remote
VIX-Pulpo-Node
VIX-Pulpo-Upstream-Status
X-From
X-Backend-TTL
X-Mode
Accept-Language
Country
X-Drupal-Cache-Contexts
Mime-Version
X-CDN-Forward
X-Cluster-Name
X-Origin-TTL
X-Forwarded-Host
X-Origin-CC
X-UnsetCookies
X-TT-TIMESTAMP
X-Edge-Location
Odigeo-Trace-Id
X-Info
Rt-Fastcgi-Cache
X-Whom
X-Microcachable
X-Newrelic-Synthetics
X-Varnish-Cache-Hits
X-B3-Spanid
X-Magnolia-Registration
X-Geo
X-PERF
X-ApacheServer
X-Daa-Tunnel
X-CLOUD-TRACE-CONTEXT
ServedBy
X-NGENIX-Cache
Content-Disposition
X-UPSTREAM-Address
X-EC-Lua
Proxy-Connection
X-No-Session
X-Routing-Service
X-Proxied
Ohc-File-Size
Ohc-Cache-HIT
X-Zipkin-Id
X-Device-Type
X-Via-Fastly
Cf-Ipcountry
X-TA-CDN-Provider
X-Uri
Machine
Xc-Version
X-Aed
X-SRCache-Key
Meta-Geo-Continent
X-Accel-Expires-Debug
MD5-Digest
X-A-Wwc
T-Server
X-G
GEO-REGION-INFO
X-Destination
BehaviorPad-Version
AsisCache
Content-Script-Type
Content-Style-Type
Fastcgi-X-Cache-Version
X-D
X-Date
X-Connection-Hash
Apple-News-Services-Request-Url
Apple-News-Services-Parsed-Url
W
X-CF-Lambda-Fn
X-Geo-Header
X-GeoIP-Country-Code
X-CF-Lambda-Version
X-External-Request-Id
Apple-News-Services-Host
Apple-News-Services-Handled
X-DPWN-IS-SECURE
X-Transaction
Viewtype
X-VG-WebServer
X-Trv-Group
X-PHP-Host
X-B-Cookie
X-Application
X-Vdms-Version
X-Rewrite-Enabled
VivaBuild
X-A
X-S-Cookie
X-VG-TLSProxy
X-A-Dgt
X-Rojux
X-ARC
X-Twitter-Response-Tags
X-Labrador-Cache-Channel
X-S
X-A-Dcw
X-VG-WebCache
Rendered-Blocks
X-A-Dam
X-Rocket-Build-Number
X-Sigma-Backend
X-Request-UUID
X-Region-Sid
Mobile-Detection-Method
X-Sigma
X-A-Ccd
X-Session-Fingerprint
X-Vtex-Processado-Em
X-ScT
X-Vtex-Remote-Cache
X-Real-IP
X-C
HitType
User-Cache-Control
X-VC-Cache
X-Render-Time
X-Contensis-Viewer-Groups
X-CUA
Fastly-Soc-X-Request-Id
X-Varnish-Authentication
X-Cache-Time
Gh-Request-Id
X-Developers
CDCHOST
X-Agile-Id
X-Distil-CS
Ha-Gx-Prefs
X-Agile-Age
HA-Ipaddr
X-App-Name
X-Eu-Site
X-Auto-Login
Server-Cache-Control
Server-Surrogate-Control
X-Thanos
X-Bip
Locid
X-CGP
X-Wikidot-Static-Cache
X-SIPLIST1
X-Agile
X-WebServer
X-Logging-Id
X-Wikidot-Backend
X-Cache-ASPX
X-Cache-Debug
X-TrackingId
Powered-By
IsBot
X-Nc
X-Backend-State
X-Tumblr-Pixel-3
X-GoCache-CacheStatus
Section-Io-Cache
Fastly-SSL
X-Cms-Context
X-Block-Status
We-Hiring
X-Cdn-Srv
X-Clientip
X-Cache-Backend
X-Cache-Bucket
X-BBXSRF
X-AK-Request-ID
X-Cache-URL
X-Cache-Info
X-Clara-WADP
X-Azure-Ref
X-Ms-Version
X-RateLimit-Remaining-Second
X-RateLimit-Limit-Second
X-Rebelmouse-Cache-Control
X-Rebelmouse-Surrogate-Control
X-Request-URI
X-Proxy-Upstream
X-Owner
X-Origin-Date
X-NX-Host
X-Origin-Expires
X-OVcl
X-OVcl-Cache
X-Server-W
X-Sucuri-Cache
X-VServer
X-User
X-WADP-Cache
X-We-Are-Hiring
X-Webstats-RespID
X-Urbn-Site-Id
X-Urbn-Context-Path
X-SVT-ORM-VERSION
X-SVT-ORM-RULES
X-Swa-Ws
X-Trace-Id
X-TT-LOGID
X-NodeID
X-Nginx-Cache-Key
X-FW-Version
X-Fastly-Cache
X-Gen-Mode
X-Generated-In
X-Generation-Time
X-Epic-Correlation-Id
X-Distributor
X-Debug-Cache-Store
X-Debug-Cache-Fetch
X-Debug-Cookies
X-Debug-Log
X-Dispatcher-Server
X-Hit
X-Hnp-Log
X-LI-Proto
X-Li-Pop
X-LI-UUID
X-Micro-Cache
X-Ms-Request-Id
X-Li-Fabric
X-Key
X-IN-APIGATEWAY
X-IN-APIGATEWAYSSL
X-Instart-Isnd
X-Irp-Debug
X-Debug-Cache-Expiry
Web-Mar-Node
Request-EU
Request-Country
X-Tec-Api-Origin
X-Tec-Api-Root
X-Tec-Api-Version
RNT-Machine
IBM-Web2-Location
Access-Control-Request-Headers
Locale
Mail-Subject
Memcached
Environment
Kp-EeAlive
Heartbleed
RNT-Time
Fastly-SWR
True-Client-Country-4JS
Fastly-Backend-Name
Fastly-SIE
Countrycode
Geo-Info
Cdnsip
V-Age
AKAMAI
Cache-Host
Server-Int
Cdncip
Country-Code
X-App-Version
Adler-Geo
X-Has-Esi
ServerName
X-GeoIP-City
X-Gamma-Serve
X-Generated-On
X-Fetched-On
X-JWT-State
X-ServiceProvider
X-Service
X-Req
X-Servername
X-Variation
X-TH-Server
X-Trafficlayer-App-Version
X-Up
X-Thinkindot-L3
X-Reboot
X-Platform-Server
X-Internal-Host
X-Varnish-Beresp-Grace
X-Varnish-Beresp-Ttl
X-Is-Gdpr
X-Level-Front-Cache
X-Old-Content-Length
X-NU-AKA-ACS-Version
X-Matched-Rule
X-Hash
X-Varnish-Beresp-Status
Is-Eu
X-Cache-Tags
Thinkindot-CacheControl
Server-ID
Platform
Server-Host
Thinkindot-Control
Thinkindot-CacheControl-Type
X-Core-Mission
X-Core-Value
Wxu-Next-Region
Wxu-Next-Commit
Wxu-Next-Hostname
FNAC-ModuleRouting
PFcat
X-Lb-Id
X-Location
X-Response-By
X-Nginx-Cache
Cache-Hits
Filterid
X-SERVER
X-S-Maxage
X-B3-Parentspanid
RequestId
X-Tb-Optimization-Total-Bytes-Saved
X-Parent-Response-Time
X-Refresh
Pragrma
X-Air-Hostname
X-Var-Ttl
X-CSRF-TOKEN
Group
X-CF-Powered-By
X-Cdn-Forward
X-B3-SpanId
Memory
S-Cnection
ProcessTime
X-NC
X-Cache-Expired-At
X-BACKEND-TTL
Origin
Powered-By-ChinaCache
X-Pjax-Url
X-Wa
X-Server-IP
X-CSRF-Token
X-Pf-Uncompressing
Geoip-Latitude
User-Agent
TTL
X-Cdn-Request-ID
Media-Length
GeoIp-Country-Code
X-Unique-ID
SRV
X-NGINX-Cache
X-Sucuri-ID
X-Correlation-ID
X-Ua
X-Vcl-Version
Geoip-City
PICS-Label
X-Sucuri-Id
X-Varnish-Cacheable
X-NWS-UUID-VERIFY
X-COUNTRY
X-Via-CDN
X-Rocket-Nginx-Bypass
Dnion-Transfer-Encoding
X-Servedbyhost
X-Developer
X-TIME
XServer
X-Cache-Grace
X-Reqid
X-Cdn-Origin
Esi-Enabled
X-Webkit-CSP
X-LAGOON
X-Sn-Servicetimems
X-Device-Os
X-Litespeed-Cache
SN
X-Ocache
X-Node-Id
X-AIR-PT
M-TraceId
X-Policy
X-Planisys-CDN-TTL
X-Planisys-CDN-Cache
X-Varnish-Ttl
X-Via-Ucdn
X-Planisys-CDN-Rules
On-Server
X-MSEdge-Flight
X-HS-Status
X-Azure-Ref-OriginShield
A
X-MSEdge-Features
X-Request-Host
X-Request-Start
Tcn
HostName
X-Cache-Status-Check
X-FORWARDED-FOR
X-Fastly-Country-Code
Rt-Proxy-Cache
Cloudfront-Viewer-Country
Hostname
X-Cache-Ttl
X-Beluga-Cache-Status
Who
X-Beluga-Trace
Cdn
X-Beluga-Status
Resin-Trace
X-Beluga-Record
X-Beluga-Response-Time
X-Beluga-Node
X-Oss-Hash-Crc64ecma
X-Oss-Server-Time
X-Oss-Storage-Class
X-ServedByHost
X-Oss-Request-Id
X-Oss-Object-Type
X-VHOST
X-Ftr-Cache-Host
X-Method
NtCoent-Length
Magicmarker
X-Bc
X-VCL-Version
X-Zone
CF-Cached-On
MIME-Version
Pics-Label
X-Varnish-URL
X-Ratelimit-Remaining
X-APP
Host-ID
X-LiteSpeed-Cache-Control
Ttl
GeoIP-Country-Code
Load-Balancing
X-Oracle-Dms-Rid
GeoIP-Latitude
Cteonnt-Length
X-Svr
X-Be
Ohc-Response-Time
X-Varnish-Url
X-Fastly-Backend-Reqs
X-DC
DSUID
X-RSL
X-VarnishDD-TTL
GeoIP-City
X-MServer
X-VCT
X-DB
X-Slack-Backend
X-PF-Uncompressing
X-DI
X-DSS
X-RPM
X-DW
X-RPS
X-PJAX-URL
X-Newrelic-App-Data
Vix-Hermes-Req-Id
Release
X-Hp-Ccpa-Warning
X-Dispatch
X-Cache-FS-Status
X-FPC
X-Server-Time
Amp-Access-Control-Allow-Source-Origin
Pramga
X-Processor
Processtime
X-Ratelimit-Limit
X-Action
X-SRV
X-HostName
X-Tid
X-Skip-Cache
WebServer
Arc-Country
X-PAYTM-SRV-ID
X-Ftr-Request-Id
CACHE
X-ND-Cache
X-Swift-Error
X-Dynatrace
X-Configured-By
X-DevSite-Last-Modified
X-BE
X-WR-MODIFICATION
Servername
X-Fastly-Request-Id
X-Dynatrace-Js-Agent
SD-X-WS
X-Aicache-OS
X-SD-PageType
X-Upstream-Ht
Cache-Provider
X-Upstream-Ct
X-Served-From
Cdn-Host
X-ABtesting
X-Hello
X-Flog
Fastly-Drupal-HTML
X-ID
Requestid
Cdn-Request-Time
X-Edge-Server
N-Cache
X-Frame-Option
X-Ftr-Realm
X-StackifyID
X-Amzn-Remapped-Date
X-WA
X-Amzn-Remapped-Connection
X-Ftr-Dc
X-Bc-Bl
X-SN
X-Ftr-Balancer
Dynatrace
X-Ftr-Backend-Server
CF-IPCountry
X-Compress-Hint
X-LB-ID
X-Branch-Name
Lfy
Pagetype
CDN
X-Ftr-Backend
L
X-Snapshot-Date
X-Fastly-Cache-Hits
X-Cache-Id
X-CACHE-AGE
D-Cc-Upstream
X-Varnish-Beresp-TTL
X-ServerName
X-Edge-IP
X-Apw-Access-Object
X-Apw-Access-Action
X-Apw-Access-Token
X-Apw-Hits
X-ZONE
X-SB
X-VC
X-Backend-Host
X-Cc-Req-Id
X-Cc-Via
V-Cache
X-Release
X-Request-Url
X-Via-NSCOPI
Proxy-Firewall
Warning
WZWS-RAY
Backend-Name
X-Powered-Y
X-App
DataCenter
Correlation-Id
X-Request-URL
WP-Super-Cache
X-ElasticPress-Search
LB
X-Check-Cacheable
X-Worker
Lb
X-Fastly-Cache-Status
X-Scheme
X-BC