URL: https://aktivitet.esf.se/
Submission: On August 17 via api from IE

Summary

This website contacted 4 IPs in 4 countries across 4 domains to perform 9 HTTP transactions. The main IP is 84.17.218.166, located in Bromma, Sweden and belongs to TELECOMPUTING-, SE. The main domain is aktivitet.esf.se.
TLS certificate: Issued by GlobalSign GCC R3 DV TLS CA 2020 on December 25th 2020. Valid for: a year.
This is the only time aktivitet.esf.se was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
4 84.17.218.166 57208 (TELECOMPU...)
3 2606:4700::68... 13335 (CLOUDFLAR...)
1 151.101.13.26 54113 (FASTLY)
1 2001:4de0:ac1... 20446 (HIGHWINDS3)
9 4
Domain Requested by
4 aktivitet.esf.se aktivitet.esf.se
3 stackpath.bootstrapcdn.com aktivitet.esf.se
stackpath.bootstrapcdn.com
1 code.jquery.com aktivitet.esf.se
1 cdn.polyfill.io aktivitet.esf.se
9 4

This site contains no links.

Subject Issuer Validity Valid
*.esf.se
GlobalSign GCC R3 DV TLS CA 2020
2020-12-25 -
2022-01-26
a year crt.sh
sni.cloudflaressl.com
Cloudflare Inc ECC CA-3
2021-03-01 -
2022-02-28
a year crt.sh
polyfill.io
GlobalSign Atlas R3 DV TLS CA 2020
2021-06-04 -
2022-07-06
a year crt.sh
*.jquery.com
Sectigo RSA Domain Validation Secure Server CA
2021-07-14 -
2022-08-14
a year crt.sh

This page contains 1 frames:

Primary Page: https://aktivitet.esf.se/
Frame ID: 35CBF003F8C54D11BBD79E392667414A
Requests: 9 HTTP requests in this frame

Screenshot


Detected technologies

Overall confidence: 100%
Detected patterns
  • headers server /Debian/i

Overall confidence: 100%
Detected patterns
  • html /<link[^>]+?href="[^"]*bootstrap(?:\.min)?\.css/i
  • script /(?:\/([\d.]+))?(?:\/js)?\/bootstrap(?:\.min)?\.js/i

Overall confidence: 100%
Detected patterns
  • headers server /(?:Apache(?:$|\/([\d.]+)|[^/-])|(?:^|\b)HTTPD)/i

Overall confidence: 100%
Detected patterns
  • script /^https?:\/\/cdn\.polyfill\.io\//i
  • script /\/polyfill\.min\.js/i

Overall confidence: 100%
Detected patterns
  • script /jquery[.-]([\d.]*\d)[^/]*\.js/i
  • script /jquery.*\.js(?:\?ver(?:sion)?=([\d.]+))?/i

Page Statistics

9
Requests

100 %
HTTPS

50 %
IPv6

4
Domains

4
Subdomains

4
IPs

4
Countries

572 kB
Transfer

1633 kB
Size

0
Cookies

Redirected requests

There were HTTP redirect chains for the following requests:

9 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
Primary Request /
aktivitet.esf.se/
4 KB
2 KB
Document
General
Full URL
https://aktivitet.esf.se/
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
84.17.218.166 Bromma, Sweden, ASN57208 (TELECOMPUTING-, SE),
Reverse DNS
host-84-17-218-166.telecomputing.se
Software
Apache/2.4.25 (Debian) /
Resource Hash
da1cb8f75fcf1cfcb4c659040c699eb5fe7e2ca1de6464f9cb043729b954c5c5
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

Host
aktivitet.esf.se
Connection
keep-alive
Pragma
no-cache
Cache-Control
no-cache
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36
Accept
text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Sec-Fetch-Site
none
Sec-Fetch-Mode
navigate
Sec-Fetch-User
?1
Sec-Fetch-Dest
document
Accept-Encoding
gzip, deflate, br
Accept-Language
en-US
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

Date
Tue, 17 Aug 2021 05:53:05 GMT
Server
Apache/2.4.25 (Debian)
Last-Modified
Mon, 07 Jun 2021 08:33:34 GMT
ETag
"f50-5c428e5a3b380-gzip"
Accept-Ranges
bytes
Vary
Accept-Encoding
Content-Encoding
gzip
X-Content-Type-Options
nosniff
Referrer-Policy
no-referrer-when-downgrade
Access-Control-Allow-Origin
*
Access-Control-Allow-Credentials
true
Content-Length
1537
Keep-Alive
timeout=5, max=100
Connection
Keep-Alive
Content-Type
text/html
style.css
aktivitet.esf.se/assets/styles/
95 KB
12 KB
Stylesheet
General
Full URL
https://aktivitet.esf.se/assets/styles/style.css?v=1db2cb8e8cf5fbc21b7088ae9cb78ce0
Requested by
Host: aktivitet.esf.se
URL: https://aktivitet.esf.se/
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
84.17.218.166 Bromma, Sweden, ASN57208 (TELECOMPUTING-, SE),
Reverse DNS
host-84-17-218-166.telecomputing.se
Software
Apache/2.4.25 (Debian) /
Resource Hash
a7fefb48c655e730ccc13c9f8120136944fba9c4890830641d7a3126608edd7f
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

Pragma
no-cache
Sec-Fetch-Site
same-origin
Accept-Encoding
gzip, deflate, br
Host
aktivitet.esf.se
Accept-Language
en-US
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36
Sec-Fetch-Mode
no-cors
Accept
text/css,*/*;q=0.1
Cache-Control
no-cache
Sec-Fetch-Dest
style
Referer
https://aktivitet.esf.se/
Connection
keep-alive
Referer
https://aktivitet.esf.se/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

Date
Tue, 17 Aug 2021 05:53:05 GMT
Content-Encoding
gzip
Referrer-Policy
no-referrer-when-downgrade
Last-Modified
Mon, 07 Jun 2021 08:33:34 GMT
Server
Apache/2.4.25 (Debian)
ETag
"17da0-5c428e5a3b380-gzip"
Vary
Accept-Encoding
Content-Type
text/css
Access-Control-Allow-Origin
*
Access-Control-Allow-Credentials
true
Connection
Keep-Alive
Accept-Ranges
bytes
Keep-Alive
timeout=5, max=99
Content-Length
12189
X-Content-Type-Options
nosniff
bootstrap.min.css
stackpath.bootstrapcdn.com/bootstrap/3.3.7/css/
118 KB
20 KB
Stylesheet
General
Full URL
https://stackpath.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css
Requested by
Host: aktivitet.esf.se
URL: https://aktivitet.esf.se/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6812:bcf , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
f75e846cc83bd11432f4b1e21a45f31bc85283d11d372f7b19accd1bf6a2635c
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

Origin
https://aktivitet.esf.se
Referer
https://aktivitet.esf.se/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

date
Tue, 17 Aug 2021 05:53:05 GMT
content-encoding
br
x-content-type-options
nosniff
cf-cache-status
HIT
cdn-edgestorageid
632, 617, 617, 617
age
68515
cdn-cachedat
2021-06-08 21:21:23
cdn-pullzone
252412
cross-origin-resource-policy
cross-origin
alt-svc
h3-27=":443"; ma=86400, h3-28=":443"; ma=86400, h3-29=":443"; ma=86400, h3=":443"; ma=86400
timing-allow-origin
*
access-control-allow-origin
*
last-modified
Mon, 25 Jan 2021 22:03:59 GMT
server
cloudflare
cdn-requestpullcode
200
expect-ct
max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
strict-transport-security
max-age=31536000; includeSubDomains; preload
content-type
text/css; charset=utf-8
cdn-cache
HIT
vary
Accept-Encoding
cache-control
public, max-age=31919000
cdn-uid
b1941f61-b576-4f40-80de-5677acb38f74
cdn-requestid
d87e27bf4c71cd0b04580a942e27927e
cf-ray
6800a3db1c614e8c-FRA
cdn-requestcountrycode
DE
cdn-status
200
cdn-requestpullsuccess
True
polyfill.min.js
cdn.polyfill.io/v2/
222 B
606 B
Script
General
Full URL
https://cdn.polyfill.io/v2/polyfill.min.js
Requested by
Host: aktivitet.esf.se
URL: https://aktivitet.esf.se/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
151.101.13.26 Frankfurt am Main, Germany, ASN54113 (FASTLY, US),
Reverse DNS
Software
/
Resource Hash
cae897bdde94867960ad284a56b1631296eaceddf5710a2857127ca0aa2777d3
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubdomains; preload
X-Content-Type-Options nosniff

Request headers

Referer
https://aktivitet.esf.se/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

strict-transport-security
max-age=31536000; includeSubdomains; preload
content-encoding
br
x-content-type-options
nosniff
content-type
text/javascript; charset=utf-8
age
2264733
detected-user-agent
Chrome/89.0.4389
server-timing
HIT, fastly;desc="Edge time";dur=0, HIT, fastly;desc="Edge time";dur=1
content-length
126
referrer-policy
origin-when-cross-origin
last-modified
Wed, 21 Jul 2021 20:09:20 GMT
date
Tue, 17 Aug 2021 05:53:05 GMT
vary
User-Agent, Accept-Encoding
access-control-allow-methods
GET,HEAD,OPTIONS
normalized-user-agent
chrome/89.0.0
access-control-allow-origin
*
cache-control
public, s-maxage=31536000, max-age=604800, stale-while-revalidate=604800, stale-if-error=604800
accept-ranges
bytes
timing-allow-origin
*
ebs.png
aktivitet.esf.se/assets/images/
26 KB
26 KB
Image
General
Full URL
https://aktivitet.esf.se/assets/images/ebs.png
Requested by
Host: aktivitet.esf.se
URL: https://aktivitet.esf.se/
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
84.17.218.166 Bromma, Sweden, ASN57208 (TELECOMPUTING-, SE),
Reverse DNS
host-84-17-218-166.telecomputing.se
Software
Apache/2.4.25 (Debian) /
Resource Hash
4ff42086f41b3e2d122a1dec300133129dbf972b1a52e84dbbabc1de795486ac
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

Pragma
no-cache
Sec-Fetch-Site
same-origin
Accept-Encoding
gzip, deflate, br
Host
aktivitet.esf.se
Accept-Language
en-US
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36
Sec-Fetch-Mode
no-cors
Accept
image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8
Cache-Control
no-cache
Sec-Fetch-Dest
image
Referer
https://aktivitet.esf.se/
Connection
keep-alive
Referer
https://aktivitet.esf.se/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

Date
Tue, 17 Aug 2021 05:53:05 GMT
Referrer-Policy
no-referrer-when-downgrade
Last-Modified
Mon, 07 Jun 2021 08:33:04 GMT
Server
Apache/2.4.25 (Debian)
ETag
"6774-5c428e3d9f000"
Content-Type
image/png
Access-Control-Allow-Origin
*
Access-Control-Allow-Credentials
true
Connection
Keep-Alive
Accept-Ranges
bytes
Keep-Alive
timeout=5, max=100
Content-Length
26484
X-Content-Type-Options
nosniff
jquery-3.3.1.min.js
code.jquery.com/
85 KB
30 KB
Script
General
Full URL
https://code.jquery.com/jquery-3.3.1.min.js
Requested by
Host: aktivitet.esf.se
URL: https://aktivitet.esf.se/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2001:4de0:ac18::1:a:3b , Netherlands, ASN20446 (HIGHWINDS3, US),
Reverse DNS
Software
nginx /
Resource Hash
160a426ff2894252cd7cebbdd6d6b7da8fcd319c65b70468f10b6690c45d02ef

Request headers

Referer
https://aktivitet.esf.se/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

date
Tue, 17 Aug 2021 05:53:05 GMT
content-encoding
gzip
last-modified
Sat, 20 Jan 2018 17:26:44 GMT
server
nginx
etag
W/"5a637bd4-1538f"
vary
Accept-Encoding
x-hw
1629179585.dop224.fr8.t,1629179585.cds236.fr8.hn,1629179585.cds002.fr8.c
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
max-age=315360000, public
accept-ranges
bytes
content-length
30288
bootstrap.min.js
stackpath.bootstrapcdn.com/bootstrap/3.3.7/js/
36 KB
11 KB
Script
General
Full URL
https://stackpath.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js
Requested by
Host: aktivitet.esf.se
URL: https://aktivitet.esf.se/
Protocol
H3-29
Security
QUIC, , AES_128_GCM
Server
2606:4700::6812:bcf , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
53964478a7c634e8dad34ecc303dd8048d00dce4993906de1bacf67f663486ef
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

Origin
https://aktivitet.esf.se
Referer
https://aktivitet.esf.se/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

date
Tue, 17 Aug 2021 05:53:05 GMT
content-encoding
br
x-content-type-options
nosniff
cf-cache-status
HIT
cdn-edgestorageid
752, 617, 617, 617, 617, 617, 617, 617, 617, 617
age
68515
cdn-cachedat
2021-08-02 15:29:35
cdn-pullzone
252412
cross-origin-resource-policy
cross-origin
alt-svc
h3-27=":443"; ma=86400, h3-28=":443"; ma=86400, h3-29=":443"; ma=86400, h3=":443"; ma=86400
timing-allow-origin
*
access-control-allow-origin
*
last-modified
Mon, 25 Jan 2021 22:04:00 GMT
server
cloudflare
cdn-requestpullcode
200
expect-ct
max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
strict-transport-security
max-age=31536000; includeSubDomains; preload
content-type
application/javascript; charset=utf-8
cdn-cache
HIT
vary
Accept-Encoding
cache-control
public, max-age=31919000
cdn-uid
b1941f61-b576-4f40-80de-5677acb38f74
cdn-requestid
ce843fae10d1472c9757b083ffdc8aa3
cf-ray
6800a3db7b5405fd-FRA
cdn-requestcountrycode
DE
cdn-status
200
cdn-requestpullsuccess
True
bundle.js
aktivitet.esf.se/assets/js/
1 MB
452 KB
Script
General
Full URL
https://aktivitet.esf.se/assets/js/bundle.js?v=5f86caab397a68c5f39c560d4b33011f
Requested by
Host: aktivitet.esf.se
URL: https://aktivitet.esf.se/
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
84.17.218.166 Bromma, Sweden, ASN57208 (TELECOMPUTING-, SE),
Reverse DNS
host-84-17-218-166.telecomputing.se
Software
Apache/2.4.25 (Debian) /
Resource Hash
d70eb4149249d739b8e8755637de731cc0b87bdb2199c49dd198eb92bc56e7c4
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

Pragma
no-cache
Sec-Fetch-Site
same-origin
Accept-Encoding
gzip, deflate, br
Host
aktivitet.esf.se
Accept-Language
en-US
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36
Sec-Fetch-Mode
no-cors
Accept
*/*
Cache-Control
no-cache
Sec-Fetch-Dest
script
Referer
https://aktivitet.esf.se/
Connection
keep-alive
Referer
https://aktivitet.esf.se/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

Date
Tue, 17 Aug 2021 05:53:05 GMT
Content-Encoding
gzip
Referrer-Policy
no-referrer-when-downgrade
Last-Modified
Mon, 07 Jun 2021 08:33:24 GMT
Server
Apache/2.4.25 (Debian)
ETag
"1389b2-5c428e50b1d00-gzip"
Transfer-Encoding
chunked
Content-Type
application/javascript
Access-Control-Allow-Origin
*
Access-Control-Allow-Credentials
true
Connection
Keep-Alive
Accept-Ranges
bytes
Vary
Accept-Encoding
X-Content-Type-Options
nosniff
Keep-Alive
timeout=5, max=98
glyphicons-halflings-regular.woff2
stackpath.bootstrapcdn.com/bootstrap/3.3.7/fonts/
18 KB
18 KB
Font
General
Full URL
https://stackpath.bootstrapcdn.com/bootstrap/3.3.7/fonts/glyphicons-halflings-regular.woff2
Requested by
Host: stackpath.bootstrapcdn.com
URL: https://stackpath.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css
Protocol
H3-29
Security
QUIC, , AES_128_GCM
Server
2606:4700::6812:bcf , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
fe185d11a49676890d47bb783312a0cda5a44c4039214094e7957b4c040ef11c
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

Origin
https://aktivitet.esf.se
Referer
https://stackpath.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

date
Tue, 17 Aug 2021 05:53:05 GMT
x-content-type-options
nosniff
cf-cache-status
HIT
cdn-edgestorageid
601
age
68515
cdn-proxyver
1.0
cdn-cachedat
08/03/2021 23:23:50
cdn-pullzone
252412
cross-origin-resource-policy
cross-origin
alt-svc
h3-27=":443"; ma=86400, h3-28=":443"; ma=86400, h3-29=":443"; ma=86400, h3=":443"; ma=86400
content-length
18028
timing-allow-origin
*
access-control-allow-origin
*
last-modified
Mon, 25 Jan 2021 22:04:00 GMT
server
cloudflare
cdn-requestpullcode
200
expect-ct
max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
strict-transport-security
max-age=31536000; includeSubDomains; preload
content-type
font/woff2
cdn-cache
HIT
vary
Accept-Encoding
cache-control
public, max-age=31919000
cdn-uid
b1941f61-b576-4f40-80de-5677acb38f74
cdn-requestid
ed597d5409250fe8a42470e3b6a7645e
accept-ranges
bytes
cf-ray
6800a3db7b5705fd-FRA
cdn-requestcountrycode
DE
cdn-status
200
cdn-requestpullsuccess
True

Verdicts & Comments Add Verdict or Comment

66 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.

object| onbeforexrselect object| ontransitionrun object| ontransitionstart object| ontransitioncancel object| cookieStore function| showDirectoryPicker function| showOpenFilePicker function| showSaveFilePicker boolean| originAgentCluster object| trustedTypes boolean| crossOriginIsolated function| $ function| jQuery function| _toConsumableArray2 function| _nonIterableSpread2 function| _iterableToArray2 function| _arrayWithoutHoles2 function| _slicedToArray2 function| _nonIterableRest2 function| _unsupportedIterableToArray function| _arrayLikeToArray function| _iterableToArrayLimit2 function| _arrayWithHoles2 function| _objectSpread2 function| _defineProperty2 function| _typeof2 string| BASE_URL string| DEPRECATED_SERVER_URL string| SERVER_URL string| SERVER_URL_EXTERNAL object| weekdays object| monthNames undefined| programArea undefined| helpers undefined| holidayList undefined| getHolidaysFrom undefined| Normalizer undefined| request undefined| isHTML undefined| goToVerifyCode undefined| goToLogin undefined| goToLoggedIn undefined| toggleNavbarContent undefined| checkSessionState undefined| clearSession undefined| logout undefined| timeout undefined| translationService undefined| renderDayFeed undefined| renderDayList undefined| renderLoginPage undefined| checkCountDown undefined| isOnCoolDown undefined| renderMonthListPage undefined| renderMonthlyReportList undefined| renderPersonalInformationPage undefined| renderProjmenu undefined| renderResetPasswordPage undefined| renderSignActivityPage undefined| renderSignHistoryPage undefined| renderStartPage undefined| renderVerifyCodePage object| ___FONT_AWESOME___ object| FontAwesomeConfig object| FontAwesome function| moment

0 Cookies

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