Submitted URL: http://karnwong.me/
Effective URL: https://karnwong.me/
Submission: On September 27 via api from US — Scanned from NL

Summary

This website contacted 6 IPs in 3 countries across 5 domains to perform 11 HTTP transactions. The main IP is 2a06:98c1:3120::3, located in United States and belongs to CLOUDFLARENET, US. The main domain is karnwong.me.
TLS certificate: Issued by WE1 on August 9th 2024. Valid for: 3 months.
This is the only time karnwong.me was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
5 2a06:98c1:312... 13335 (CLOUDFLAR...)
2 188.114.97.9 13335 (CLOUDFLAR...)
1 2a00:1450:400... 15169 (GOOGLE)
1 188.114.96.3 13335 (CLOUDFLAR...)
1 2a05:d014:58f... 16509 (AMAZON-02)
1 2001:4860:480... 15169 (GOOGLE)
11 6
Apex Domain
Subdomains
Transfer
7 karnwong.me
karnwong.me
plausible.karnwong.me
20 KB
1 google-analytics.com
region1.google-analytics.com — Cisco Umbrella Rank: 3391
1 wonderful.software
webring.wonderful.software
573 B
1 simpleicons.org
simpleicons.org — Cisco Umbrella Rank: 808463
856 B
1 googletagmanager.com
www.googletagmanager.com — Cisco Umbrella Rank: 57
100 KB
11 5
Domain Requested by
5 karnwong.me karnwong.me
2 plausible.karnwong.me karnwong.me
plausible.karnwong.me
1 region1.google-analytics.com www.googletagmanager.com
1 webring.wonderful.software karnwong.me
1 simpleicons.org karnwong.me
1 www.googletagmanager.com karnwong.me
11 6

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

Domain
github.com
www.linkedin.com
speakerdeck.com
buymeacoffee.com
webring.wonderful.software
gohugo.io
Subject Issuer Validity Valid
karnwong.me
WE1
2024-08-09 -
2024-11-07
3 months crt.sh
*.google-analytics.com
WR2
2024-08-26 -
2024-11-18
3 months crt.sh
simpleicons.org
WE1
2024-08-06 -
2024-11-04
3 months crt.sh
*.xn--72c0bd3cbbz4of9d.xn--o3cw4h
E6
2024-08-30 -
2024-11-28
3 months crt.sh

This page contains 1 frames:

Primary Page: https://karnwong.me/
Frame ID: FA243028C575D188134B5E37AC2B3366
Requests: 11 HTTP requests in this frame

Screenshot

Page Title

Karn Wong

Page URL History Show full URLs

  1. http://karnwong.me/ HTTP 307
    https://karnwong.me/ Page URL

Detected technologies

Overall confidence: 100%
Detected patterns

Overall confidence: 100%
Detected patterns
  • googletagmanager\.com/gtag/js

Page Statistics

11
Requests

100 %
HTTPS

67 %
IPv6

5
Domains

6
Subdomains

6
IPs

3
Countries

122 kB
Transfer

344 kB
Size

2
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. http://karnwong.me/ HTTP 307
    https://karnwong.me/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

11 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
Primary Request /
karnwong.me/
Redirect Chain
  • http://karnwong.me/
  • https://karnwong.me/
25 KB
9 KB
Document
General
Full URL
https://karnwong.me/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
58a9b55cdc3629808746b7a32580eacd4fd22e4740ea65eecfbeb6315ed39c7d
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Response headers

access-control-allow-origin
*
cache-control
public, max-age=0, must-revalidate
cf-cache-status
DYNAMIC
cf-ray
8c9b41b4785a3a68-FRA
content-encoding
br
content-type
text/html; charset=utf-8
date
Fri, 27 Sep 2024 11:47:02 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
referrer-policy
strict-origin-when-cross-origin
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=0ew0kbKITSSq7h7SjpKFDTMsoP0XV7eRIbHLRsfduYu%2BXx%2FWmEqYAjGypUdPC40W206gxKNPCe8JZIIjxW2J4LumzEsLr5XioJDcfeuWMD1G32ZXAXOX1%2FXVrca%2BsA8GMjAFM2XLlKONSA%3D%3D"}],"group":"cf-nel","max_age":604800}
server
cloudflare
speculation-rules
"/cdn-cgi/speculation"
vary
Accept-Encoding
x-content-type-options
nosniff

Redirect headers

Location
https://karnwong.me/
Non-Authoritative-Reason
HttpsUpgrades
speculation
karnwong.me/cdn-cgi/
2 B
306 B
Other
General
Full URL
https://karnwong.me/cdn-cgi/speculation
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Origin
https://karnwong.me
Referer
https://karnwong.me/

Response headers

nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=6ewedZIlHLHApEqWYHDvQI7vZ9exUy6gPUieU2zoLzMdH9D0xkqj8ljxk9AfxduQtCtllfCbc%2BY0CnkZ5GS2d54%2FuaQ3ON%2BA8KqwS3%2BDzOoMPHF92j4xPSJlERZIkOUpXI6rlubWt3ShZg%3D%3D"}],"group":"cf-nel","max_age":604800}
cf-ray
8c9b41b549653a68-FRA
content-length
2
date
Fri, 27 Sep 2024 11:47:02 GMT
content-type
application/speculationrules+json
vary
Accept-Encoding
server
cloudflare
stylesheet.css
karnwong.me/assets/css/
17 KB
5 KB
Stylesheet
General
Full URL
https://karnwong.me/assets/css/stylesheet.css
Requested by
Host: karnwong.me
URL: https://karnwong.me/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
b609c58d5c11bb90b1a54e04005d74ad1ddf22165eb79f5533967e57df9c3b50
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Origin
https://karnwong.me
Referer
https://karnwong.me/

Response headers

cache-control
public, max-age=14400, must-revalidate
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
content-encoding
gzip
cf-cache-status
MISS
etag
W/"217d36beca882204841a13b1942b7132"
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=E45v6wePMMwAoNuLOdAIJijhavamvjK7huCzNQIIc4M5WIWeUXBY2MVCdLD6X1b2GxdwEspU3IEQBJeEWi0a8Qu2NI8rCT%2BhlHauUaPQ7NDN3FTJQMmpdu1nkPzwTMKLTnyzMGBiFx0mZA%3D%3D"}],"group":"cf-nel","max_age":604800}
x-content-type-options
nosniff
referrer-policy
strict-origin-when-cross-origin
cf-ray
8c9b41b549683a68-FRA
access-control-allow-origin
*
date
Fri, 27 Sep 2024 11:47:02 GMT
content-type
text/css; charset=utf-8
vary
Accept-Encoding
server
cloudflare
script.js
plausible.karnwong.me/js/
1 KB
1 KB
Script
General
Full URL
https://plausible.karnwong.me/js/script.js
Requested by
Host: karnwong.me
URL: https://karnwong.me/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
188.114.97.9 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
965387ce9489d0167cf33444ab52d064bb3fab35e94b12082ff5eb00a34c070c
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Referer
https://karnwong.me/

Response headers

cache-control
public, max-age=86400, must-revalidate
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
content-encoding
br
cf-cache-status
MISS
cross-origin-resource-policy
cross-origin
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=oTpUUAqdOQ%2BbFX0FAFeeVW3JM85SvYapQ6JJgwHprYMrRv0sI0%2FFJH%2FbX%2B5wRS7gBNHs1DFE9p86y4ERvnh441lyawjin4Q7ZI4mGD%2FQvrCivWvuFquYLnwO89Gt%2FgGIHlSYwXCcYbA%3D"}],"group":"cf-nel","max_age":604800}
x-content-type-options
nosniff
cf-ray
8c9b41b5ee738ebb-FRA
access-control-allow-origin
*
date
Fri, 27 Sep 2024 11:47:03 GMT
content-type
application/javascript
last-modified
Fri, 27 Sep 2024 11:47:03 GMT
vary
Accept-Encoding
server
cloudflare
js
www.googletagmanager.com/gtag/
294 KB
100 KB
Script
General
Full URL
https://www.googletagmanager.com/gtag/js?id=G-8CYMFC0KZ9
Requested by
Host: karnwong.me
URL: https://karnwong.me/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:81d::2008 Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
Google Tag Manager /
Resource Hash
2ca4ba237265997075f7d6ce7ccb029844c9c8b101dc2ea786bd29ee87e0e325
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains
X-Xss-Protection 0

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Referer
https://karnwong.me/

Response headers

content-encoding
br
report-to
{"group":"coop_reporting","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/scaffolding/ascgcycc:838:0"}],}
expires
Fri, 27 Sep 2024 11:47:02 GMT
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
date
Fri, 27 Sep 2024 11:47:02 GMT
content-type
application/javascript; charset=UTF-8
vary
Accept-Encoding
access-control-allow-headers
Cache-Control
strict-transport-security
max-age=31536000; includeSubDomains
cache-control
private, max-age=900
cross-origin-resource-policy
cross-origin
access-control-allow-credentials
true
content-security-policy-report-only
script-src 'none'; form-action 'none'; frame-src 'none'; report-uri https://csp.withgoogle.com/csp/scaffolding/ascgcycc:838:0
access-control-allow-origin
*
cross-origin-opener-policy-report-only
same-origin; report-to=coop_reporting
content-length
101905
x-xss-protection
0
server
Google Tag Manager
email-decode.min.js
karnwong.me/cdn-cgi/scripts/5c5dd728/cloudflare-static/
1 KB
1 KB
Script
General
Full URL
https://karnwong.me/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js
Requested by
Host: karnwong.me
URL: https://karnwong.me/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
2595496fe48df6fcf9b1bc57c29a744c121eb4dd11566466bc13d2e52e6bbcc8
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Frame-Options DENY

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Referer
https://karnwong.me/

Response headers

x-frame-options
DENY
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
cache-control
max-age=172800, public
content-encoding
gzip
etag
W/"66f31e14-4d7"
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=dfFgw94Rf2GmQ5n8oHKac24J4Lx9Jp7Gg4QFKNLDn51Aagb6rWkpIwlFnrAUx9X87QSsogvr4EPaWNLoq9E3a%2FE1LmfB8REdqvU4OMco2rBoBeZVMlASWadgjiluY%2FhV8fliLNb03Mp1pg%3D%3D"}],"group":"cf-nel","max_age":604800}
x-content-type-options
nosniff
cf-ray
8c9b41b5496f3a68-FRA
expires
Sun, 29 Sep 2024 11:47:02 GMT
date
Fri, 27 Sep 2024 11:47:02 GMT
content-type
application/javascript
last-modified
Tue, 24 Sep 2024 20:16:20 GMT
server
cloudflare
vary
Accept-Encoding
speakerdeck.svg
simpleicons.org/icons/
545 B
856 B
Image
General
Full URL
https://simpleicons.org/icons/speakerdeck.svg
Requested by
Host: karnwong.me
URL: https://karnwong.me/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
b1a4e9b68ce93cd8b06b23a0843fa6cabb22e01bdfb3bdb6327626681ba0aa0f
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Referer
https://karnwong.me/

Response headers

cache-control
public, max-age=14400, must-revalidate
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
content-encoding
gzip
cf-cache-status
MISS
etag
W/"933826930cd67bcec3c404934139e9af"
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=zP64PyCRnbFWmOYuIo4OSwAOsdQdOcZaXTxBtzzPwPWXOff0XYjilkerzzezxchHERIu%2FwWtyMQPhm0oUp7saSHlar7h2t0K6W8Z4vvIOnMmSPHpOL57Es54HRfrR%2BkgN4k%3D"}],"group":"cf-nel","max_age":604800}
x-content-type-options
nosniff
referrer-policy
strict-origin-when-cross-origin
cf-ray
8c9b41b64a53d232-FRA
access-control-allow-origin
*
date
Fri, 27 Sep 2024 11:47:02 GMT
content-type
image/svg+xml
vary
Accept-Encoding
server
cloudflare
webring.svg
webring.wonderful.software/
357 B
573 B
Image
General
Full URL
https://webring.wonderful.software/webring.svg
Requested by
Host: karnwong.me
URL: https://karnwong.me/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a05:d014:58f:6202::64 Frankfurt am Main, Germany, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Netlify /
Resource Hash
2d12404b1072458fcdb24c53a36185018df2c46efa0b988eab4c7cfd7783c604
Security Headers
Name Value
Strict-Transport-Security max-age=31536000

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Referer
https://karnwong.me/

Response headers

strict-transport-security
max-age=31536000
cache-control
public,max-age=0,must-revalidate
etag
"d5796afa67dc39bc14ffa18f61b1b5da-ssl"
age
35194
accept-ranges
bytes
content-length
357
x-nf-request-id
01J8SMWKKS872CBDBPRB5ZGEDC
cache-status
"Netlify Edge"; hit
date
Fri, 27 Sep 2024 11:47:02 GMT
content-type
image/svg+xml
server
Netlify
collect
region1.google-analytics.com/g/
0
0
Fetch
General
Full URL
https://region1.google-analytics.com/g/collect?v=2&tid=G-8CYMFC0KZ9&gtm=45je49p0v894504272za200&_p=1727437622687&gcd=13l3l3l2l1l1&npa=1&dma_cps=syphamo&dma=1&tag_exp=101671035~101686684~101747727&cid=2084755530.1727437623&ul=nl-nl&sr=1600x1200&uaa=&uab=&uafvl=&uamb=0&uam=&uap=&uapv=&uaw=0&are=1&frm=0&pscdl=noapi&_s=1&sid=1727437622&sct=1&seg=0&dl=https%3A%2F%2Fkarnwong.me%2F&dt=Karn%20Wong&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=520
Requested by
Host: www.googletagmanager.com
URL: https://www.googletagmanager.com/gtag/js?id=G-8CYMFC0KZ9
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2001:4860:4802:34::36 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
Software
Golfe2 /
Resource Hash

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Referer
https://karnwong.me/

Response headers

cache-control
no-cache, no-store, must-revalidate
pragma
no-cache
cross-origin-resource-policy
cross-origin
access-control-allow-credentials
true
content-security-policy-report-only
script-src 'none'; form-action 'none'; frame-src 'none'; report-uri https://csp.withgoogle.com/csp/scaffolding/ascnsrsggc:86:0
report-to
{"group":"coop_reporting","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/scaffolding/ascnsrsggc:86:0"}],}
expires
Fri, 01 Jan 1990 00:00:00 GMT
access-control-allow-origin
https://karnwong.me
cross-origin-opener-policy-report-only
same-origin; report-to=coop_reporting
content-length
0
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
date
Fri, 27 Sep 2024 11:47:02 GMT
content-type
text/plain
server
Golfe2
event
plausible.karnwong.me/api/
2 B
498 B
XHR
General
Full URL
https://plausible.karnwong.me/api/event
Requested by
Host: plausible.karnwong.me
URL: https://plausible.karnwong.me/js/script.js
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
188.114.97.9 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
2689367b205c16ce32ed4200942b8b8b1e262dfc70d9bc9fbc77c49699a4f1df

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Content-Type
text/plain
Referer
https://karnwong.me/

Response headers

x-request-id
F_kXXdbcgen5kP0AmRIC
access-control-expose-headers
cache-control
max-age=0, private, must-revalidate
cf-cache-status
DYNAMIC
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
access-control-allow-credentials
true
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=Twfjqx0Neesoj5zIELvx53F9sV36X%2B0Kq%2FD5ia5T3uQ7bDKYMSBDha1fDajhNGJQAQVxe26DoUQEh8LnNxjNoRHsTfCK0juWggla45LX%2BPVI%2BDKaDiesmVxtpXB1juV0hRGhoDKhrQ4%3D"}],"group":"cf-nel","max_age":604800}
cf-ray
8c9b41ba2c289bb0-FRA
access-control-allow-origin
*
content-length
2
date
Fri, 27 Sep 2024 11:47:04 GMT
content-type
text/plain; charset=utf-8
server
cloudflare
favicon.ico
karnwong.me/
4 KB
3 KB
Other
General
Full URL
https://karnwong.me/favicon.ico
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
d4080a80f801c35b5bbbdb995f326c076cfb52df53893c5921159b4e3734b008
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Referer
https://karnwong.me/

Response headers

cache-control
public, max-age=14400, must-revalidate
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
content-encoding
gzip
cf-cache-status
MISS
etag
W/"a7d6334cadd5107c7a86839835b29bbe"
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=t03LemBk33YRPl6CXWIq2Jj0QhkDU24M6K6bXKvERF7nyfl71PophSWBwrwASEJOyCVmpPt20e7FpvHCtacc64vO84VM%2BXifoHGudlfdCGT1SuwFoTf8ok7atFoSnnk%2Fuw81FL0O14D3Qw%3D%3D"}],"group":"cf-nel","max_age":604800}
x-content-type-options
nosniff
referrer-policy
strict-origin-when-cross-origin
cf-ray
8c9b41b9ffe33a68-FRA
access-control-allow-origin
*
date
Fri, 27 Sep 2024 11:47:03 GMT
content-type
image/vnd.microsoft.icon
vary
Accept-Encoding
server
cloudflare

Verdicts & Comments Add Verdict or Comment

8 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.

function| gtag object| dataLayer object| mybutton object| google_tag_manager object| google_tag_data function| onYouTubeIframeAPIReady object| gaGlobal function| plausible

2 Cookies

Domain/Path Name / Value
.karnwong.me/ Name: _ga_8CYMFC0KZ9
Value: GS1.1.1727437622.1.0.1727437622.0.0.0
.karnwong.me/ Name: _ga
Value: GA1.1.2084755530.1727437623

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
X-Content-Type-Options nosniff