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
Content-Length
X-Frame-Options
Strict-Transport-Security
X-Content-Type-Options
Accept-Ranges
Last-Modified
CF-RAY
CF-Cache-Status
Pragma
Link
X-Powered-By
ETag
Expect-CT
X-XSS-Protection
Via
X-Cache
Age
Content-Security-Policy
Access-Control-Allow-Origin
Content-Language
P3P
X-UA-Compatible
X-Cache-Hits
X-Amz-Cf-Pop
X-Amz-Cf-Id
Referrer-Policy
X-Served-By
X-Xss-Protection
X-Varnish
X-Timer
Access-Control-Allow-Headers
Access-Control-Allow-Methods
Alt-Svc
X-Download-Options
X-Request-Id
X-AspNet-Version
Access-Control-Allow-Credentials
X-Runtime
X-FRAME-OPTIONS
X-Drupal-Cache
X-Adblock-Key
X-Request-ID
X-Check
X-Generator
Content-Security-Policy-Report-Only
X-Cache-Status
X-Cacheable
X-Permitted-Cross-Domain-Policies
X-DNS-Prefetch-Control
Timing-Allow-Origin
X-Iinfo
X-Template
X-Language
Status
X-Content-Security-Policy
X-AspNetMvc-Version
X-Buckets
Content-Encoding
Access-Control-Expose-Headers
Upgrade
Xkey
Access-Control-Max-Age
Keep-Alive
X-Kinja-Server-Push
X-Drupal-Dynamic-Cache
X-CDN
X-Turbo-Charged-By
X-Via
X-AH-Environment
X-Cache-Group
X-Age
X-Pass-Why
X-Backend
X-Ua-Compatible
X-Envoy-Upstream-Service-Time
EagleId
X-Amz-Id-2
X-Amz-Request-Id
X-Robots-Tag
X-Server
X-Page-Speed
X-Pingback
X-Server-Powered-By
X-UA-Device
X-Proxy-Cache
X-Swift-SaveTime
X-Swift-CacheTime
X-Hacker
X-Nginx-Cache-Status
Ali-Swift-Global-Savetime
Request-Context
Grace
X-Varnish-Cache
Server-Timing
Feature-Policy
Cf-Railgun
X-Amz-Version-Id
X-Device
X-LiteSpeed-Cache
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Rq
X-WebKit-CSP
Report-To
X-Cdn
EagleEye-TraceId
X-Server-Id
X-Ac
X-Response-Time
X-OneAgent-JS-Injection
X-Host
Request-Id
X-Cnection
X-Backend-Server
X-DataDome
X-Node
Content-Location
X-Origin-Cache
X-Cloud-Trace-Context
X-Readtime
X-Cache-Lookup
NEL
X-Ws-Request-Id
X-Vhost
X-Application-Context
X-Dispatcher
X-ORACLE-DMS-ECID
X-ORACLE-DMS-RID
X-HW
Allow
X-Clacks-Overhead
X-Rack-Cache
X-EdgeConnect-Origin-MEX-Latency
X-EdgeConnect-MidMile-RTT
X-Dns-Prefetch-Control
X-Origin-Upstream-Status
X-DynaTrace
Surrogate-Control
Rating
X-FTR-Request-ID
X-Country-Code
Fusion-Content-Source
Fusion-Content-Id
Fusion-Component-Id
Fusion-Source
Fusion-Template-Id
X-Akam-SW-Version
X-Country
X-Goog-Hash
Pinterest-Generated-By
X-Varnish-TTL
X-Ruxit-JS-Agent
X-Instart-Request-ID
X-TtlSet
X-PC
X-Vname
X-MS-InvokeApp
Edge-Control
X-B3-TraceId
X-Mod-Pagespeed
Verso
X-Url
SPRequestGuid
X-Powered-By-Plesk
X-D2id
Response
Pagespeed
X-Middleton-Response
X-Sol
X-SharePointHealthScore
X-Trace
Display
X-Middleton-Display
X-VARITI-CCR
RTSS
Service-Worker-Allowed
X-Server-Name
X-Kinja-Build
X-Kinja-Revision
X-Kinja
X-GoogleNews-Bot
X-Kinja-Server
X-Exp-Id
X-Cdn-Fetch
X-Exp-Variant
X-Use-Magma
X-GitHub-Request-Id
Accept-Ch
Content-MD5
SPIisLatency
SPRequestDuration
X-Server-ID
X-Navigation-Version
X-Vcache
X-TTL
X-Powered-CMS
X-Abt-Application-Version
X-Debug
X-Vcap-Request-Id
X-ESI
X-Amz-Server-Side-Encryption
Public-Key-Pins
Charset
MS-Author-Via
X-CST
X-Upstream
X-Forwarded-Proto
X-Cached
X-NF-Request-ID
X-Amz-Rid
X-Version
Realpath
Edge-Cache-Tag
DynaTrace
X-Px
X-Aspnetmvc-Version
X-Shard
MicrosoftSharePointTeamServices
TCN
Arr-Disable-Session-Affinity
Accept-Ch-Lifetime
X-Ezoic-Cdn
X-XRDS-Location
Fastly-Restarts
X-TEC-API-ORIGIN
X-TEC-API-VERSION
X-TEC-API-ROOT
X-Pinterest-Rid
X-MSEdge-Ref
Pinterest-Version
X-Shield-Request-Id
Access-Control-Request-Method
X-SRCache-Fetch-Status
X-SRCache-Store-Status
X-Ser
S
X-Fastly-Request-ID
X-Recruiting
X-DynaTrace-JS-Agent
X-Trafficlayer-App-Scope
X-Trafficlayer-App-Name
X-Accel-Expires
X-Goog-Generation
X-Goog-Metageneration
X-DIS-Request-ID
X-Goog-Stored-Content-Encoding
X-Goog-Stored-Content-Length
Front-End-Https
X-Amz-Meta-S3cmd-Attrs
X-Client-IP
Nginx-Cache
X-Goog-Storage-Class
X-Id
X-T
X-Varnish-Age
X-Element-Page-Cache
Mrf-Cache-Status
X-B3-TraceId-Primal
MRF-Tech
X-Mrf-Item-Lastmod
X-Mrf-Section-Lastmod
X-FTR-Cache-Status
X-FTR-Realm
X-FTR-Balancer
X-FTR-DC
X-FTR-Backend-Server
X-FTR-Backend
X-Country-Code-Real
X-FTR-Expires
X-Amzn-Trace-Id
X-Dw-Request-Base-Id
Cache-Tag
X-Ttl
Fastcgi-Cache
X-HS-Cache-Config
X-HS-Content-Id
X-Frontend
X-HS-Hub-Id
X-Webapp-Samesite-None-Activated-N
X-Content-Digest
NR-ENABLED
Powered
X-Correlation-Id
X-Hits
Accept-CH-Lifetime
X-RateLimit-Remaining
X-Fastcgi-Cache
X-Kinsta-Cache
X-FTR-Cache-Host
Alternate-Protocol
X-Hp-Webp
X-Litespeed-Cache
Accept-CH
X-N
ServerID
X-Grace
X-Cache-Hit
X-Request-Processing-Time
X-Request-Received
TP-L2-Cache
TP-Cache
X-Microsite
X-Request-Handler-Origin-Region
X-Node-Name
Server-Name
PB-RID
X-HS-Combine-CSS
X-Webkit-Csp
PB-PID
Arc-Version
X-Mobile-Rewrite
AMP-Access-Control-Allow-Source-Origin
X-User-Agent
X-Rid
X-Content-Type
Healthy
X-Zen-Fury
X-Analytics
Backend-Timing
X-Revision
X-Akamai-Edgescape
Server-Node
X-Logged-In
X-Content-Security-Policy-Report-Only
X-SERVER
X-LB-Cache
AR-CACHE
AR-ATIME
AR-PoweredBy
X-Az
X-AppVersion
X-Activity-Id
Cache-Status
X-Amz-Apigw-Id
X-Amzn-RequestId
X-Pad
X-GUploader-UploadID
X-IPLB-Instance
X-Forwarded-For
X-FastCGI-Cache
X-Cached-By
X-NWS-LOG-UUID
X-Varnish-Grace
X-Mobile-URL
Retry-After
Ar-Sid
X-Type
X-Oneagent-Js-Injection
X-B3-Sampled
X-Content-Options
X-F-Cache
Refresh
Paypal-Debug-Id
X-Esi
X-Geo-Country
Upgrade-Insecure-Requests
X-Srv
FilterID
X-Ruxit-Js-Agent
X-App-Environment
X-Via-JSL
X-Tumblr-Pixel-0
X-Tumblr-User
X-Instance
X-Debug-Info
X-FB-Debug
X-Jobs
X-Tumblr-Pixel
Host
X-PHP-Backend
X-Request-Guid
X-AOL-HN
Source
X-Varnish-Backend
DC
Accept-Charset
X-B
X-Framework
X-Cache-Age
X-Cluster
Access-Control-Allow-Method
Actual-Object-TTL
X-Page-Id
X-Erf-Bev-Bev-Is-Generated
X-Erf-Bev-Bev
X-Cache-Key
X-ATG-Version
X-Seen-By
X-WebKit-CSP-Report-Only
AR-Request-ID
Fastcgi-Useragent
X-TT
MS-CV
X-Cache-2
X-Git-Hash
X-Content-Powered-By
X-Whom
X-Cache-TTL
VIX-Pulpo-Node
VIX-Pulpo-Upstream-Status
X-PressLabs-Stats
Cache
X-UA
X-Cache-Control
X-Amz-Replication-Status
X-Signature
X-B-Cache
X-Host-Name
X-Wix-Request-Id
Surrogate-Key
Host-Header
X-TA-CDN-Provider
Frame-Options
X-Response-Served-From
NGB
X-Daa-Tunnel
X-FW-Server
X-Origin-Server
X-FW-Type
X-FW-Hash
X-FW-Static
X-FW-Serve
X-RequestSource
X-Drupal-Cache-Tags
X-GeoIP
X-Cache-Enabled
X-Cache-Rule
X-Cache-Operation
X-Mobile
WPE-Backend
Cache-Tv-Group
X-Hyper-Cache
X-Kong-Upstream-Latency
X-Region
X-Kong-Proxy-Latency
Eomportal-Instance
Filters
X-Tumblr-Pixel-2
X-TX-ID
X-Tumblr-Pixel-1
X-Cache-Action
X-Handled-By
X-Cache-NE
X-Cacheable-TTL
X-Adobe-Content
X-Adobe-Loc
Payment
Cleartype
X-EdgeConnect-Cache-Status
Webserver
From-Origin
Xserver
X-Forwarded-Host
X-Time
X-UA-Device-Type
X-ProcessESI
X-Hostname
X-RemovedCookies
Datacenter
X-Akamai-Transformed
X-Cache-TTL-Remaining
X-RTag
Ms-Operation-Id
X-Load-Cache
X-App-Server
X-NewRelic-App-Data
X-Edge-Location
X-Cache-Server
X-Status
X-ATS-Timestamp
X-Contextid
Liferay-Portal
X-Yottaa-Metrics
X-Yottaa-Optimizations
Tracecode
X-Varnish-Hostname
X-Varnish-Server
X-URL
X-BCube-Filmed-By
X-Rule
X-TT-TIMESTAMP
Odigeo-Trace-Id
Country
Load-Balancing
Meta-Geo
X-Path-Route
X-RN-RSRV
X-Cache-Var-Map
X-Upgrade-Enabled
X-ES-SERVER
X-Cache-Var
X-FW-Dynamic
X-Viewer-Country
X-RateLimit-Limit
X-Xfnlog-Site
X-Debug-Cache
DSUID
X-Cache-Host
X-PCL
X-VCT
X-Via-Fastly
X-EIG-Tracking-Id
TWC-GeoIP-LatLong
TWC-Device-Class
X-Origin-Hint
TWC-GeoIP-Country
X-Pubstack
X-OCL
X-Varnish-Cache-Hits
TWC-Locale-Group
TWC-Connection-Speed
Webcakes-App-Name
DB-Nickname
Cache-Tags
Server-Info
Webcakes-App-Version
Webcakes-Region
Release
Property-Id
TWC-Privacy
X-CCM
Version
Mn-Server-Ip
X-Oss-Hash-Crc64ecma
X-Oss-Request-Id
X-Oss-Object-Type
X-Oss-Storage-Class
X-Oss-Server-Time
X-Human
Azure-InstanceId
X-IP
X-Cache-Config
X-Cache-Time
Azure-RegionName
X-Hosted-By
X-Drupal-Cache-Contexts
X-From
Azure-SlotName
S-Rt
Origin-Edge-Control
Origin-Cache-Control
NGX
Cache-Name
X-Akamai-Request-ID
Fastly-SSL
Azure-Version
X-Akamai-Request-ID2
Azure-SiteName
X-Labrador-Cache-Channel
X-Soup
X-TNCMS
X-UUID
X-Web-Node
X-R9-Blue-Green-Version
X-Redis-Cache
X-Origin-Response-Time
X-Origin
X-Loop
X-ServerID
X-Generated
X-Site-Version
X-Access
S-Cnection
L5d-Success-Class
X-Www-Served-By
X-Section
X-Rocket-Nginx-Bypass
X-Proxy
X-Content-Age
X-Proto
X-FC-Vary-Parameters
X-PERF
X-ApacheServer
X-Rendered-As
X-Real-IP
X-Locale
X-Format
X-FireWall-Port
Decoy-Debug-Status
Decoy-Debug-Key
Decoy-Debug-TTL
X-NWS-UUID-VERIFY
Ec-Rule-Version
X-Goog-Meta-Goog-Reserved-File-Mtime
Viewport
X-Time-Microsecs
X-JoinUs
X-Varnish-Hits
X-ORACLE-APMCS-TAG
X-ORACLE-APMCS-REQUEST-ID
X-Vgn-Hpd-Reason
X-Info
X-Is-Bot
X-Timing-Wait
Selected-Fe
X-Proxy-Build
X-Cluster-Name
X-XRDS-LOCATION
X-Storage
X-Backend-Name
X-VCache
Uber-Trace-Id
X-ProxyCache-Status
X-ProxyCache-Key
X-BYPASS-REASON
X-Generated-By
Rt-Fastcgi-Cache
X-Cache-Backend
X-Origin-TTL
X-Origin-CC
X-PHP-Host
Cteonnt-Length
X-Accel-Buffering
X-Amzn-Remapped-Content-Length
X-App-Version
Cache-Key
X-WA-Info
Akamai-GRN
Time
X-Webkit-CSP
X-Presslabs-Stats
X-SS-Set-Cookie
Cache-Hits
X-Nginx-Cache-Key
Origin
X-GoCache-CacheStatus
Vix-Hermes-Req-Id
X-Cache-Remote
GEO-INFO
X-CF-Powered-By
X-NCache
X-Hit
X-Guploader-Uploadid
X-SaId
X-Backend-TTL
X-Trace-Id
X-FB-TRIP-ID
X-No-Session
Accept-Language
X-MServer
X-L-Path
X-Environment-Context
X-CDN-Forward
X-Geo
X-APP-VERSION
X-Tb
X-CS
Access-Control-Request-Headers
X-Device-Type
X-Tumblr-Pixel-3
X-Unique-Id
X-Cache-Grace
X-SayCDN-TTL
X-Say-Cacheable
X-B3-SpanId
X-Say-TTL
Srv
X-B3-Traceid
X-OVcl
X-OVcl-Cache
X-S
X-COUNTRY
X-CSRF-TOKEN
X-Cluster-Node
User-Cache-Control
X-Uri
OT-Force-Account-Verify
X-Alternate-Cache-Key
X-Sorting-Hat-PodId
X-ShopId
Fastcgi-X-Cache-Version
X-ShardId
X-Shopify-Stage
ServedBy
X-Sorting-Hat-ShopId
Node
Xc-Version
Content-Script-Type
X-Vtex-Remote-Cache
Arc-Country
Apple-News-Services-Request-Url
Apple-News-Services-Parsed-Url
Apple-News-Services-Handled
Apple-News-Services-Host
AsisCache
BehaviorPad-Version
Machine
MD5-Digest
IsBot
Cross-Origin-Window-Policy
Content-Style-Type
Mobile-Detection-Method
X-Transaction
X-Request-UUID
X-Rewrite-Enabled
X-ARC
X-B-Cookie
X-CF-Lambda-Fn
X-Rojux
X-Application
X-Accel-Expires-Debug
X-S-Cookie
X-Aed
X-AIR-PT
X-CF-Lambda-Version
X-Connection-Hash
X-External-Request-Id
X-DPWN-IS-SECURE
X-G
X-Hl-Ver
X-PAYTM-SRV-ID
X-Detected-As
X-Destination
X-D
X-Date
X-Region-Sid
X-Processor
X-ScT
X-A-Wwc
X-VG-WebCache
X-VG-WebServer
X-Twitter-Response-Tags
X-Trv-Group
Viewtype
X-Vtex-Processado-Em
T-Server
Request-Country
Request-EU
Rt-Proxy-Cache
Server-Host
VivaBuild
X-A
X-A-Dcw
X-Service
X-Server-Time
X-A-Dgt
X-Session-Fingerprint
X-A-Dam
X-Svr
X-A-Ccd
X-SRCache-Key
X-SIPLIST1
Rendered-Blocks
Meta-Geo-Continent
X-CACHE-KEY
X-Tec-Api-Version
X-Tec-Api-Root
X-Tec-Api-Origin
X-Via-CDN
X-Shopify-Generated-Cart-Token
ServerName
X-FW-Version
Web-Mar-Node
Wxu-Next-Commit
Wxu-Next-Hostname
X-EC-Lua
Wxu-Next-Region
X-Varnish-Beresp-Grace
X-Ah-Environment
RNT-Time
RNT-Machine
X-Request-URI
Served-By
Server-Int
X-Ms-Version
X-RateLimit-Limit-Second
X-S-Maxage
X-Block-Status
X-Instart-Isnd
X-Dispatcher-Server
X-Dispatch
X-Endurance-Cache-Level
X-Hnp-Log
X-Generated-On
X-Gen-Mode
X-Hash
X-Level-Front-Cache
X-CUA
X-Cache-Debug
X-Cache-Bucket
X-Varnish-Beresp-Status
X-Cache-Info
X-Location
X-Core-Value
X-Cms-Context
X-Clara-WADP
X-Ms-Request-Id
X-RateLimit-Remaining-Second
Proxy-Connection
X-WADP-Cache
We-Hiring
CDCHOST
Cache-Host
Mime-Version
X-Varnish-Beresp-Ttl
X-Webstats-RespID
Mail-Subject
X-NC
X-Dc
X-B3-Parentspanid
Now
X-Origin-Date
X-Has-Esi
X-Agile-Id
X-Agile
X-Agile-Age
X-Distributor
X-Old-Content-Length
X-Azure-Ref
X-Azure-Ref-OriginShield
X-NX-Host
X-App-Name
X-GeoIP-City
X-Amz-Meta-Cache-Control
X-Owner
Adler-Geo
X-VG-TLSProxy
AKAMAI
W
X-VC-Cache
X-Generation-Time
X-Qloud-Router
Hostname
X-Fastly-Cache
X-Proxy-Cache-Status
X-VServer
X-Proxy-Upstream
X-Origin-Expires
X-Backend-State
X-Compress-Hint
X-Core-Mission
X-IN-APIGATEWAYSSL
X-LI-UUID
X-We-Are-Hiring
X-Wikidot-Backend
X-Li-Pop
X-Wikidot-Static-Cache
X-Developers
X-Debug-Log
X-Debug-Cookies
X-Li-Fabric
X-Cdn-Srv
X-Logging-Id
X-C
X-Epic-Correlation-Id
X-IN-APIGATEWAY
X-BBXSRF
X-Is-Gdpr
True-Client-Country-4JS
X-Cache-FS-Status
X-Matched-Rule
X-Cache-URL
X-Method
X-Vdms-Version
X-Cache-Id
X-JWT-State
X-Platform-Server
Magicmarker
L
X-Skip-Cache
Is-Eu
Memcached
X-Server-IP
Platform
X-Scheme
PFcat
X-SD-PageType
IBM-Web2-Location
Heartbleed
Fastly-Soc-X-Request-Id
Esi-Enabled
X-Up
Content-Disposition
X-Thinkindot-L3
X-Swa-Ws
X-Sucuri-Cache
X-SVT-ORM-RULES
X-SVT-ORM-VERSION
Pramga
Kp-EeAlive
SD-X-WS
X-Reboot
X-UnsetCookies
X-Variation
Section-Io-Cache
X-User
X-Geo-Header
Thinkindot-CacheControl-Type
Thinkindot-Control
Thinkindot-CacheControl
X-Reqid
X-Release
Cache-Provider
X-Magnolia-Registration
NtCoent-Length
X-Parent-Response-Time
X-SRV
X-Auto-Login
X-Key
X-RCS-CacheZone
X-Distil-CS
X-Debug-Cache-Fetch
X-Debug-Cache-Expiry
Ha-Gx-Prefs
X-LI-Proto
Gh-Request-Id
X-NodeID
X-Thanos
X-Urbn-Site-Id
X-Rocket-Build-Number
V-Age
X-Generated-In
Cdnsip
Countrycode
X-Eu-Site
X-AK-Request-ID
X-Irp-Debug
X-Internal-Host
X-TrackingId
X-Request-Start
X-Debug-Cache-Store
X-ServiceProvider
X-Urbn-Context-Path
X-WebServer
Locale
X-MSEdge-Flight
X-Sigma-Backend
X-MSEdge-Features
X-Sigma
HA-Ipaddr
Cdncip
X-Policy
X-Clientip
X-Bip
X-CGP
X-Source
X-Nc
Powered-By-ChinaCache
X-Via-NSCOPI
X-Planisys-CDN-TTL
X-Upstream-Ht
X-Upstream-Ct
X-Planisys-CDN-Rules
X-7Graus-Varnish-XKeys
Server-ID
X-7Graus-Varnish-Cache-Control
X-Planisys-CDN-Cache
CF-IPCountry
X-ND-Cache
X-Servername
X-B3-Spanid
X-FORWARDED-FOR
GEO-REGION-INFO
X-Developer
A
Environment
X-Cdn-Forward
X-Nginx-Cache
X-GRACE
X-Sucuri-Id
X-Sn-Servicetimems
X-Trafficlayer-App-Version
X-Device-Os
X-Cdn-Origin
X-Be
X-FPC
X-Lb-Id
Geo-Info
X-Node-Id
X-TIME
X-Servedbyhost
Locid
X-Req
X-Served-From
X-VHOST
X-Gamma-Serve
X-Microcachable
FNAC-ModuleRouting
X-Newrelic-Synthetics
X-Refresh
ProcessTime
Tcn
X-Sucuri-ID
X-HTML-Minification-Powered-By
Request-Time
X-Edge-O15-RID
X-IPS-LoggedIn
X-Zone
X-AWS-Id
X-VCL-Version
X-Tb-Optimization-Total-Bytes-Saved
Memory
X-Render-Time
X-VWS-Id
Resin-Trace
X-LJ-Flow-ID
X-Pjax-Url
XServer
X-DC
X-NU-AKA-ACS-Version
X-Pf-Uncompressing
Gannett-Cam-Experience-Id
Group
X-Instart-Info
X-ElasticPress-Search
X-ECACHE
X-GeoIP-Country-Code
X-Correlation-ID
CF-Cached-On
Geoip-Latitude
Amp-Access-Control-Allow-Source-Origin
X-Mode
X-ZONE
MIME-Version
GeoIp-Country-Code
X-MP-GENERATED-AT
X-Backend-Url
X-Var-Ttl
X-NGENIX-Cache
X-Backend-Host
Geoip-City
X-Ratelimit-Remaining
Cf-Ipcountry
GeoIP-Latitude
M-TraceId
PICS-Label
GeoIP-City
Backend-Name
TTL
Pics-Label
Ttl
GeoIP-Country-Code
X-Pod
X-Unique-ID
X-Via-Edge
X-CSRF-Token
X-Via-SSL
Cdn
Lfy
Pagetype
REQUESTUUID
X-Check-Cacheable
N-Cache
X-Dynatrace-Js-Agent
X-Proxied
X-GEO
X-Zipkin-Id
Fly-Cache
Fly-Request-Id
X-Bc
Ohc-File-Size
Cache-Prefix
X-APP
Host-ID
Ohc-Cache-HIT
X-Routing-Service
HostName
X-CLOUD-TRACE-CONTEXT
X-BC
Cache-Cookie-Set-Lfrom
X-Via-Ucdn
X-Vcl-Version
Cache-Cookie-Set-Idcheck
X-PF-Uncompressing
X-Fstrz
Cache-Cookie-Set-From
X-Worker
X-Cache-Miss-From
X-HS-Status
HitType
X-Sedo-Request-Id
X-Cdn-Request-ID
X-LiteSpeed-Cache-Control
X-PJAX-URL
X-Ratelimit-Limit
X-Swift-Error
X-TH-Server
X-Fastly-Country-Code
X-Upstream-HT
X-Upstream-CT
X-Server-W
X-Fetched-On
SRV
X-Cache-Tag
User-Agent
URI
Pragrma
X-Wa
Fastly-SWR
X-Tt-Trace-Tag
X-Rebelmouse-Cache-Control
Fastly-SIE
X-Rebelmouse-Surrogate-Control
X-Request-Time
On-Server
X-HostName
X-Aicache-OS
X-NGINX-Cache
X-UPSTREAM-Address
CDN
Powered-By
X-ServedByHost
X-WR-MODIFICATION
Who
X-TT-LOGID
Media-Length
X-WA
X-BE
X-RateLimit-Reset
CACHE
X-LB-ID
X-GDPR
Dynatrace
X-Varnish-Cacheable
X-Edge-Server
X-LAGOON
X-Varnish-URL
AR-SID
X-Fpc
X-Fastly-Backend-Reqs
Cdn-Request-Time
Cdn-Host
X-Cf-Powered-By
DataCenter
FSS-Cache
X-Tt-Trace-Host
X-ServerName
Debug
FSS-Proxy
SS
X-Flog
X-SN
X-ABtesting
LB
Get-Access-Time
Is-Session-Tracking
Server-Id
X-Hello
X-Akamai-ERPolicy
X-Akamai-ERRuleID
X-Ftr-Cache-Host
X-Ua
X-DB
X-Varnish-Beresp-TTL
X-DSS
X-DW
SN
Xet-Cookie
UCS
X-Protected-By
X-Org
X-Action
X-DI
X-RSL
X-Response-By
X-RPS
X-Gen-Id
X-RPM
X-Hp-Ccpa-Warning
X-Cache-Tags
Cneonction
XxX-Cache-Status
SID
Warning
X-VC
X-LiteSpeed-Tag
X-Li-Proto
X-SB
X-Fastly-Cache-Hits
RequestId
X-Amzn-Remapped-Connection
Product
X-Request-Url
Thinkindot-Cache-Type
NnCoection
Application
X-Amzn-Remapped-Date
X-Nananana
Requestid
X-Dw-Trace-Id