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dns.google Open in urlscan Pro
2001:4860:4860::8888  Public Scan

Go To Rescan Add Verdict Report
Submitted URL: https://cognito.dev.fm.dfman.info/
Effective URL: https://dns.google/
Submission: On November 21 via api from US — Scanned from DE
 Behaviour Indicators
Similar DOM Content API
Verdicts

Summary

This website contacted 6 IPs in 2 countries across 6 domains to perform 9 HTTP transactions. The main IP is 2001:4860:4860::8888, located in United States and belongs to GOOGLE, US. The main domain is dns.google. The Cisco Umbrella rank of the primary domain is 964.
TLS certificate: Issued by WR2 on October 21st 2024. Valid for: 3 months.
This is the only time dns.google was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
1 2 8.8.8.8 15169 (GOOGLE)
4 2001:4860:486... 15169 (GOOGLE)
1 2a00:1450:400... 15169 (GOOGLE)
1 172.217.18.4 15169 (GOOGLE)
1 216.58.206.67 15169 (GOOGLE)
9 6
2    8.8.8.8 (United States)

ASN15169 (GOOGLE, US)
PTR: dns.google
cognito.dev.fm.dfman.info
dns.google
4    2001:4860:4860::8888 (United States)

ASN15169 (GOOGLE, US)
dns.google
1    2a00:1450:4001:800::200a (Frankfurt am Main, Germany)

ASN15169 (GOOGLE, US)
fonts.googleapis.com
1    172.217.18.4 (United States)

ASN15169 (GOOGLE, US)
PTR: fra02s19-in-f4.1e100.net
www.google.com
1    216.58.206.67 (United States)

ASN15169 (GOOGLE, US)
PTR: tzfraa-aa-in-f3.1e100.net
fonts.gstatic.com
Apex Domain
Subdomains		 Transfer
5 dns.google
dns.google — Cisco Umbrella Rank: 964
9 KB
1 gstatic.com
fonts.gstatic.com
18 KB
1 google.com
www.google.com — Cisco Umbrella Rank: 3
6 KB
1 googleapis.com
fonts.googleapis.com — Cisco Umbrella Rank: 29
1 KB
1 dfman.info
cognito.dev.fm.dfman.info
445 B
0 withgoogle.com Failed
csp.withgoogle.com Failed
9 6
Domain Requested by
5 dns.google dns.google
1 fonts.gstatic.com fonts.googleapis.com
1 www.google.com dns.google
1 fonts.googleapis.com dns.google
1 cognito.dev.fm.dfman.info 1 redirects
0 csp.withgoogle.com Failed dns.google
9 6

This site contains links to these domains. Also see Links.

Domain
developers.google.com
Subject Issuer Validity Valid
dns.google
WR2		 2024-10-21 -
2025-01-13		 3 months crt.sh
upload.video.google.com
WR2		 2024-10-21 -
2025-01-13		 3 months crt.sh
*.google.com
WR2		 2024-10-21 -
2025-01-13		 3 months crt.sh
*.gstatic.com
WR2		 2024-10-21 -
2025-01-13		 3 months crt.sh

This page contains 1 frames:

Primary Page: https://dns.google/
Frame ID: 37480ED217E6D9007B7E49B0A07E7E2D
Requests: 9 HTTP requests in this frame

Screenshot
Live screenshot
Full Image

Page Title

Google Public DNS

Page URL History Show full URLs

  1. https://cognito.dev.fm.dfman.info/ HTTP 302
    https://dns.google/ Page URL

Page Statistics

9
Requests

89 %
HTTPS

40 %
IPv6

6
Domains

6
Subdomains

6
IPs

2
Countries

34 kB
Transfer

67 kB
Size

0
Cookies

Page URL History

This captures the URL locations of the websites, including HTTP redirects and client-side redirects via JavaScript or Meta fields.

  1. https://cognito.dev.fm.dfman.info/ HTTP 302
    https://dns.google/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

9 HTTP transactions

Resource
Path		 Size
x-fer		 Type
MIME-Type
Primary Request /
dns.google/
Redirect Chain
  • https://cognito.dev.fm.dfman.info/
  • https://dns.google/
1 KB
1 KB 		Document
General
Check archive.org
Download Go to
Full URL
https://dns.google/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2001:4860:4860::8888 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
Software
scaffolding on HTTPServer2 /
Resource Hash
8857c4af068cba7960980a528987b4504bdcc2e6c6fe6848d0ca72187f1864e2
Security Headers
Name Value
Content-Security-Policy object-src 'none';base-uri 'self';script-src 'nonce-F3p3aAttEJ-IoDTzLT8eIA' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Response headers

alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
content-encoding
gzip
content-length
721
content-security-policy
object-src 'none';base-uri 'self';script-src 'nonce-F3p3aAttEJ-IoDTzLT8eIA' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
content-security-policy-report-only
script-src 'none'; form-action 'none'; frame-src 'none'; report-uri https://csp.withgoogle.com/csp/scaffolding/ntdsgswbsc:55:0
content-type
text/html; charset=UTF-8
cross-origin-opener-policy-report-only
same-origin; report-to=coop_reporting
date
Thu, 21 Nov 2024 20:18:28 GMT
report-to
{"group":"coop_reporting","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/scaffolding/ntdsgswbsc:55:0"}],}
server
scaffolding on HTTPServer2
strict-transport-security
max-age=31536000; includeSubDomains; preload
x-content-type-options
nosniff
x-frame-options
SAMEORIGIN
x-xss-protection
0

Redirect headers

access-control-allow-origin
*
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
content-length
216
content-type
text/html; charset=UTF-8
date
Thu, 21 Nov 2024 20:18:28 GMT
location
https://dns.google/
server
HTTP server (unknown)
x-content-type-options
nosniff
x-frame-options
SAMEORIGIN
x-xss-protection
0
matter.min.css
dns.google/static/e6eca759/ 		36 KB
5 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://dns.google/static/e6eca759/matter.min.css
Requested by
Host: dns.google
URL: https://dns.google/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2001:4860:4860::8888 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
Software
scaffolding on HTTPServer2 /
Resource Hash
241518442cdb4882efa4562fdc386055344528caf82f54ce2b981365238f51ce
Security Headers
Name Value
Content-Security-Policy object-src 'none';base-uri 'self';script-src 'nonce-WRhA8HeRIQIjFYVPYhxPEA' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://dns.google/

Response headers

strict-transport-security
max-age=31536000; includeSubDomains; preload
content-security-policy
object-src 'none';base-uri 'self';script-src 'nonce-WRhA8HeRIQIjFYVPYhxPEA' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
content-encoding
gzip
report-to
{"group":"coop_reporting","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/scaffolding/ntdsgswbsc:58:0"}],}
content-security-policy-report-only
script-src 'none'; form-action 'none'; frame-src 'none'; report-uri https://csp.withgoogle.com/csp/scaffolding/ntdsgswbsc:58:0
x-content-type-options
nosniff
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
cross-origin-opener-policy-report-only
same-origin; report-to=coop_reporting
content-length
4651
date
Thu, 21 Nov 2024 20:18:28 GMT
x-xss-protection
0
content-type
text/css
last-modified
Thu, 21 Nov 2024 05:36:42 GMT
server
scaffolding on HTTPServer2
x-frame-options
SAMEORIGIN
shared.css
dns.google/static/f85675c0/ 		2 KB
1 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://dns.google/static/f85675c0/shared.css
Requested by
Host: dns.google
URL: https://dns.google/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2001:4860:4860::8888 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
Software
scaffolding on HTTPServer2 /
Resource Hash
1b8a0d391db7f8321b3f303880810fdf319becc4ad231bc3aca2db3f1b48dcaa
Security Headers
Name Value
Content-Security-Policy object-src 'none';base-uri 'self';script-src 'nonce-H5FaGIWJa6EeUQ0Wb6qvIw' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://dns.google/

Response headers

strict-transport-security
max-age=31536000; includeSubDomains; preload
content-security-policy
object-src 'none';base-uri 'self';script-src 'nonce-H5FaGIWJa6EeUQ0Wb6qvIw' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
content-encoding
gzip
report-to
{"group":"coop_reporting","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/scaffolding/ntdsgswbsc:58:0"}],}
content-security-policy-report-only
script-src 'none'; form-action 'none'; frame-src 'none'; report-uri https://csp.withgoogle.com/csp/scaffolding/ntdsgswbsc:58:0
x-content-type-options
nosniff
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
cross-origin-opener-policy-report-only
same-origin; report-to=coop_reporting
content-length
929
date
Thu, 21 Nov 2024 20:18:28 GMT
x-xss-protection
0
content-type
text/css
last-modified
Thu, 21 Nov 2024 05:51:26 GMT
server
scaffolding on HTTPServer2
x-frame-options
SAMEORIGIN
root.css
dns.google/static/d05cd6ba/ 		294 B
468 B 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://dns.google/static/d05cd6ba/root.css
Requested by
Host: dns.google
URL: https://dns.google/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2001:4860:4860::8888 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
Software
scaffolding on HTTPServer2 /
Resource Hash
66e5ef7b9044409074f1f8a940f993e3fbe71c8f4ff3cabbd7fe9f478418cb17
Security Headers
Name Value
Content-Security-Policy object-src 'none';base-uri 'self';script-src 'nonce-UERMV4ZtP0xY-a4cTowsWw' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://dns.google/

Response headers

strict-transport-security
max-age=31536000; includeSubDomains; preload
content-security-policy
object-src 'none';base-uri 'self';script-src 'nonce-UERMV4ZtP0xY-a4cTowsWw' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
content-encoding
gzip
report-to
{"group":"coop_reporting","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/scaffolding/ntdsgswbsc:58:0"}],}
content-security-policy-report-only
script-src 'none'; form-action 'none'; frame-src 'none'; report-uri https://csp.withgoogle.com/csp/scaffolding/ntdsgswbsc:58:0
x-content-type-options
nosniff
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
cross-origin-opener-policy-report-only
same-origin; report-to=coop_reporting
content-length
196
date
Thu, 21 Nov 2024 20:18:28 GMT
x-xss-protection
0
content-type
text/css
last-modified
Thu, 21 Nov 2024 05:51:26 GMT
server
scaffolding on HTTPServer2
x-frame-options
SAMEORIGIN
css2
fonts.googleapis.com/ 		2 KB
1 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://fonts.googleapis.com/css2?family=Roboto_old&display=swap
Requested by
Host: dns.google
URL: https://dns.google/static/f85675c0/shared.css
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:800::200a Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
ESF /
Resource Hash
23428c6301061ebb006b127c5841235122a23672f0041d08a9518520795a1bde
Security Headers
Name Value
Strict-Transport-Security max-age=31536000
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://dns.google/

Response headers

content-encoding
gzip
x-content-type-options
nosniff
expires
Thu, 21 Nov 2024 20:18:28 GMT
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
date
Thu, 21 Nov 2024 20:18:28 GMT
content-type
text/css; charset=utf-8
vary
Sec-Fetch-Dest, Sec-Fetch-Mode, Sec-Fetch-Site
last-modified
Thu, 21 Nov 2024 20:18:28 GMT
x-frame-options
SAMEORIGIN
strict-transport-security
max-age=31536000
link
<https://fonts.gstatic.com>; rel=preconnect; crossorigin
cache-control
private, max-age=86400, stale-while-revalidate=604800
timing-allow-origin
*
cross-origin-opener-policy
same-origin-allow-popups
cross-origin-resource-policy
cross-origin
access-control-allow-origin
*
x-xss-protection
0
server
ESF
ntdsgswbsc:55:0
csp.withgoogle.com/csp/scaffolding/ 		0
0
googlelogo_color_272x92dp.png
www.google.com/images/branding/googlelogo/1x/ 		6 KB
6 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png
Requested by
Host: dns.google
URL: https://dns.google/static/f85675c0/shared.css
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
172.217.18.4 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
fra02s19-in-f4.1e100.net
Software
sffe /
Resource Hash
5776cd87617eacec3bc00ebcf530d1924026033eda852f706c1a675a98915826
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Xss-Protection 0

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://dns.google/

Response headers

cache-control
private, max-age=31536000
cross-origin-resource-policy
cross-origin
report-to
{"group":"static-on-bigtable","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/static-on-bigtable"}]}
x-content-type-options
nosniff
expires
Thu, 21 Nov 2024 20:18:29 GMT
accept-ranges
bytes
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
cross-origin-opener-policy-report-only
same-origin; report-to="static-on-bigtable"
content-length
5969
date
Thu, 21 Nov 2024 20:18:29 GMT
x-xss-protection
0
content-type
image/png
last-modified
Tue, 22 Oct 2019 18:30:00 GMT
server
sffe
KFOmCnqEu92Fr1Mu4mxK.woff2
fonts.gstatic.com/s/roboto/v32/ 		18 KB
18 KB 		Font
General
Check archive.org
Download Go to
Full URL
https://fonts.gstatic.com/s/roboto/v32/KFOmCnqEu92Fr1Mu4mxK.woff2
Requested by
Host: fonts.googleapis.com
URL: https://fonts.googleapis.com/css2?family=Roboto_old&display=swap
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
216.58.206.67 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
tzfraa-aa-in-f3.1e100.net
Software
sffe /
Resource Hash
89978e658e840b927dddb5cb3a835c7d8526ece79933bd9f3096b301fe1a8571
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Xss-Protection 0

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Origin
https://dns.google
Referer
https://fonts.googleapis.com/

Response headers

age
104306
report-to
{"group":"apps-themes","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/apps-themes"}]}
x-content-type-options
nosniff
expires
Thu, 20 Nov 2025 15:20:03 GMT
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
date
Wed, 20 Nov 2024 15:20:03 GMT
last-modified
Thu, 01 Aug 2024 20:41:24 GMT
content-type
font/woff2
cache-control
public, max-age=31536000
timing-allow-origin
*
cross-origin-opener-policy
same-origin; report-to="apps-themes"
cross-origin-resource-policy
cross-origin
content-security-policy-report-only
require-trusted-types-for 'script'; report-uri https://csp.withgoogle.com/csp/apps-themes
accept-ranges
bytes
access-control-allow-origin
*
content-length
18536
x-xss-protection
0
server
sffe
favicon.png
dns.google/static/93dd5954/ 		1 KB
1 KB 		Other
General
Check archive.org
Download Go to
Full URL
https://dns.google/static/93dd5954/favicon.png
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
8.8.8.8 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
dns.google
Software
scaffolding on HTTPServer2 /
Resource Hash
6eb6de385e2bde8472be2d52eee4e155e0d63b5ca9fbbd9c73410687a589eddf
Security Headers
Name Value
Content-Security-Policy object-src 'none';base-uri 'self';script-src 'nonce-_izLOJ-y89vcODhvJ-WgsA' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://dns.google/

Response headers

strict-transport-security
max-age=31536000; includeSubDomains; preload
content-security-policy
object-src 'none';base-uri 'self';script-src 'nonce-_izLOJ-y89vcODhvJ-WgsA' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
report-to
{"group":"coop_reporting","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/scaffolding/ntdsgswbsc:58:0"}],}
content-security-policy-report-only
script-src 'none'; form-action 'none'; frame-src 'none'; report-uri https://csp.withgoogle.com/csp/scaffolding/ntdsgswbsc:58:0
x-content-type-options
nosniff
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
cross-origin-opener-policy-report-only
same-origin; report-to=coop_reporting
content-length
1142
date
Thu, 21 Nov 2024 20:18:29 GMT
x-xss-protection
0
content-type
image/png
last-modified
Thu, 21 Nov 2024 05:33:22 GMT
server
scaffolding on HTTPServer2
x-frame-options
SAMEORIGIN

Failed requests

These URLs were requested, but there was no response received. You will also see them in the list above.

Domain
csp.withgoogle.com
URL
https://csp.withgoogle.com/csp/scaffolding/ntdsgswbsc:55:0

Verdicts & Comments Add Verdict or Comment

0 JavaScript Global Variables

These are the non-standard "global" variables defined on the window object. These can be helpful in identifying possible client-side frameworks and code.

0 Cookies

1 Console Messages

Source Level URL
Text
security error URL: https://dns.google/(Line 1)
Message:
[Report Only] Refused to execute inline script because it violates the following Content Security Policy directive: "script-src 'none'". Either the 'unsafe-inline' keyword, a hash ('sha256-Zt+w7TFZUKyF1wgxoMTqJCZHPqBfGUyDG+J9ugcJNVM='), or a nonce ('nonce-...') is required to enable inline execution.

Security Headers

This page lists any security headers set by the main page. If you want to understand what these mean and how to use them, head on over to this page

Header Value
Content-Security-Policy object-src 'none';base-uri 'self';script-src 'nonce-F3p3aAttEJ-IoDTzLT8eIA' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/honest_dns/1_0;frame-ancestors 'none'
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0