Submitted URL: http://ctfd.nskb.dsal.cc/
Effective URL: https://ctfd.nskb.dsal.cc/
Submission: On March 06 via api from US — Scanned from DE

Summary

This website contacted 1 IPs in 1 countries across 1 domains to perform 14 HTTP transactions. The main IP is 185.138.244.76, located in Czech Republic and belongs to DATASPRING, CZ. The main domain is ctfd.nskb.dsal.cc.
TLS certificate: Issued by R3 on March 6th 2024. Valid for: 3 months.
This is the only time ctfd.nskb.dsal.cc was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
1 15 185.138.244.76 201730 (DATASPRING)
14 1
Apex Domain
Subdomains
Transfer
15 dsal.cc
ctfd.nskb.dsal.cc
689 KB
14 1
Domain Requested by
15 ctfd.nskb.dsal.cc 1 redirects ctfd.nskb.dsal.cc
14 1

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

Domain
ctfd.io
Subject Issuer Validity Valid
gitlab.nskb.dsal.cc
R3
2024-03-06 -
2024-06-04
3 months crt.sh

This page contains 1 frames:

Primary Page: https://ctfd.nskb.dsal.cc/
Frame ID: 9D9E947AA0DC61BFB326FD756A5BDC48
Requests: 14 HTTP requests in this frame

Screenshot

Page Title

None

Page URL History Show full URLs

  1. http://ctfd.nskb.dsal.cc/ HTTP 301
    https://ctfd.nskb.dsal.cc/ Page URL

Detected technologies

Overall confidence: 75%
Detected patterns
  • <[^>]+[^\w-]x-data[^\w-][^<]+

Page Statistics

14
Requests

100 %
HTTPS

0 %
IPv6

1
Domains

1
Subdomains

1
IPs

1
Countries

689 kB
Transfer

685 kB
Size

1
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://ctfd.nskb.dsal.cc/ HTTP 301
    https://ctfd.nskb.dsal.cc/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

14 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
Primary Request /
ctfd.nskb.dsal.cc/
Redirect Chain
  • http://ctfd.nskb.dsal.cc/
  • https://ctfd.nskb.dsal.cc/
7 KB
7 KB
Document
General
Full URL
https://ctfd.nskb.dsal.cc/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
b6106fcc5ff1995ea1dcc66c645b3a03f8b7cb7ffbcf2a22180fdea1d62bc4e7
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36
accept-language
de-DE,de;q=0.9

Response headers

content-length
7033
content-type
text/html; charset=utf-8
date
Wed, 06 Mar 2024 15:20:42 GMT
server
nginx
strict-transport-security
max-age=31536000; includeSubDomains; preload;

Redirect headers

Connection
keep-alive
Content-Length
169
Content-Type
text/html
Date
Wed, 06 Mar 2024 15:20:41 GMT
Location
https://ctfd.nskb.dsal.cc/
Server
nginx
Strict-Transport-Security
max-age=31536000; includeSubDomains; preload;
main.0aaf0d88.css
ctfd.nskb.dsal.cc/themes/core-beta/static/assets/
258 KB
259 KB
Stylesheet
General
Full URL
https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/main.0aaf0d88.css
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
0aaf0d887382bd2b461c085cb96c6536866e76f4a83d6a956a8e77fa45389d8f
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://ctfd.nskb.dsal.cc/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Mon, 26 Feb 2024 21:40:16 GMT
server
nginx
etag
"1708983616.0-264661-3160348167"
content-type
text/css; charset=utf-8
cache-control
no-cache
content-disposition
inline; filename=main.0aaf0d88.css
content-length
264661
logo-header.png
ctfd.nskb.dsal.cc/files/
8 KB
9 KB
Image
General
Full URL
https://ctfd.nskb.dsal.cc/files/logo-header.png
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
eb27b7b0053abe254b4111123114e512af0358be47ac68de119e91b0f7de7e52
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://ctfd.nskb.dsal.cc/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Wed, 06 Mar 2024 14:28:08 GMT
server
nginx
etag
"1709735288.2863603-8589-2543258249"
content-type
image/png
cache-control
no-cache
content-disposition
attachment; filename=logo-header.png
content-length
8589
logo-home.png
ctfd.nskb.dsal.cc/files/
34 KB
34 KB
Image
General
Full URL
https://ctfd.nskb.dsal.cc/files/logo-home.png
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
2058448214c4e7ba83664868dbe59a4227d0bc9cc0bed3c539e278ca0ab755e3
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://ctfd.nskb.dsal.cc/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Wed, 06 Mar 2024 14:28:08 GMT
server
nginx
etag
"1709735288.2863603-34703-2199128521"
content-type
image/png
cache-control
no-cache
content-disposition
attachment; filename=logo-home.png
content-length
34703
index.697f72c1.js
ctfd.nskb.dsal.cc/themes/core-beta/static/assets/
207 KB
207 KB
Script
General
Full URL
https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/index.697f72c1.js
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
b958a6853c069b248d2d6b1ecf2dd3958e7e9b8728be7a37b477bc75c5a66cf4
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

Referer
https://ctfd.nskb.dsal.cc/
Origin
https://ctfd.nskb.dsal.cc
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Mon, 26 Feb 2024 21:40:16 GMT
server
nginx
etag
"1708983616.0-211695-3141473723"
content-type
application/javascript; charset=utf-8
cache-control
no-cache
content-disposition
inline; filename=index.697f72c1.js
content-length
211695
page.e56ddd4d.js
ctfd.nskb.dsal.cc/themes/core-beta/static/assets/
88 B
341 B
Script
General
Full URL
https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/page.e56ddd4d.js
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
86d4e73d231c776b026b41b5129fede823d67570d846e8fb2a673aba74c9525b
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

Referer
https://ctfd.nskb.dsal.cc/
Origin
https://ctfd.nskb.dsal.cc
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Mon, 26 Feb 2024 21:40:16 GMT
server
nginx
etag
"1708983616.0-88-2802390475"
content-type
application/javascript; charset=utf-8
cache-control
no-cache
content-disposition
inline; filename=page.e56ddd4d.js
content-length
88
sskb-challenges.js
ctfd.nskb.dsal.cc/plugins/sskb_challenges/assets/
677 B
906 B
Script
General
Full URL
https://ctfd.nskb.dsal.cc/plugins/sskb_challenges/assets/sskb-challenges.js
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
5d246d6150e93f8b49eef67f1255f04ad85a1315675b9b0f40b41a11940114a3
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://ctfd.nskb.dsal.cc/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Sun, 05 Nov 2023 11:34:49 GMT
server
nginx
content-type
application/javascript; charset=utf-8
cache-control
no-cache
content-disposition
inline; filename=sskb-challenges.js
content-length
677
sskb-containers.js
ctfd.nskb.dsal.cc/plugins/sskb_containers/assets/
5 KB
5 KB
Script
General
Full URL
https://ctfd.nskb.dsal.cc/plugins/sskb_containers/assets/sskb-containers.js
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
1dde5c2f2160e3b319a0a5f71d09fadd76e667d4c7eff5650b674b7ced69d6f4
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://ctfd.nskb.dsal.cc/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Sun, 05 Nov 2023 11:34:49 GMT
server
nginx
content-type
application/javascript; charset=utf-8
cache-control
no-cache
content-disposition
inline; filename=sskb-containers.js
content-length
4973
lato-latin-400-normal.woff2
ctfd.nskb.dsal.cc/themes/core-beta/static/webfonts/
23 KB
23 KB
Font
General
Full URL
https://ctfd.nskb.dsal.cc/themes/core-beta/static/webfonts/lato-latin-400-normal.woff2
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/main.0aaf0d88.css
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
918b7dc3e2e2d015c16ce08b57bcb64d2253bafc1707658f361e72865498e537
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

Referer
https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/main.0aaf0d88.css
Origin
https://ctfd.nskb.dsal.cc
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Mon, 26 Feb 2024 21:40:16 GMT
server
nginx
etag
"1708983616.0-23580-3957988020"
content-type
application/octet-stream
cache-control
no-cache
content-disposition
inline; filename=lato-latin-400-normal.woff2
content-length
23580
fa-solid-900.woff2
ctfd.nskb.dsal.cc/themes/core-beta/static/webfonts/
124 KB
124 KB
Font
General
Full URL
https://ctfd.nskb.dsal.cc/themes/core-beta/static/webfonts/fa-solid-900.woff2
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/main.0aaf0d88.css
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
1b099f88c06ed0869872561c157f0ec9cbe133a0939d9ece4ee1e1f54bd4683d
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

Referer
https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/main.0aaf0d88.css
Origin
https://ctfd.nskb.dsal.cc
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Mon, 26 Feb 2024 21:40:16 GMT
server
nginx
etag
"1708983616.0-126828-75896605"
content-type
application/octet-stream
cache-control
no-cache
content-disposition
inline; filename=fa-solid-900.woff2
content-length
126828
lato-latin-ext-400-normal.woff2
ctfd.nskb.dsal.cc/themes/core-beta/static/webfonts/
5 KB
6 KB
Font
General
Full URL
https://ctfd.nskb.dsal.cc/themes/core-beta/static/webfonts/lato-latin-ext-400-normal.woff2
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/main.0aaf0d88.css
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
1c2fc265baaeba4f3f5b8c7285b93343aead25590f08be73d3056718b376c5d7
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

Referer
https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/main.0aaf0d88.css
Origin
https://ctfd.nskb.dsal.cc
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Mon, 26 Feb 2024 21:40:16 GMT
server
nginx
etag
"1708983616.0-5472-1565137970"
content-type
application/octet-stream
cache-control
no-cache
content-disposition
inline; filename=lato-latin-ext-400-normal.woff2
content-length
5472
notification.webm
ctfd.nskb.dsal.cc/themes/core/static/sounds/
13 KB
13 KB
XHR
General
Full URL
https://ctfd.nskb.dsal.cc/themes/core/static/sounds/notification.webm
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/index.697f72c1.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
fee895ba2d8ac31634cbf5658d71997af55e72909bd9b94b11ae0e807af1a389
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://ctfd.nskb.dsal.cc/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
last-modified
Mon, 26 Feb 2024 21:40:16 GMT
server
nginx
etag
"1708983616.0-13257-1580995969"
content-type
video/webm
cache-control
no-cache
content-disposition
inline; filename=notification.webm
content-length
13257
notifications
ctfd.nskb.dsal.cc/api/v1/
0
0
Fetch
General
Full URL
https://ctfd.nskb.dsal.cc/api/v1/notifications?since_id=0
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/index.697f72c1.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

Accept
application/json
CSRF-Token
9e1722b793521752bf5626cfadec184149526921b6f52d67c5c66b3dfe26fef2
Referer
https://ctfd.nskb.dsal.cc/
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36
Content-Type
application/json

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
server
nginx
result-count
0
content-length
0
content-type
text/html; charset=utf-8
events
ctfd.nskb.dsal.cc/
0
0
EventSource
General
Full URL
https://ctfd.nskb.dsal.cc/events
Requested by
Host: ctfd.nskb.dsal.cc
URL: https://ctfd.nskb.dsal.cc/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
185.138.244.76 , Czech Republic, ASN201730 (DATASPRING, CZ),
Reverse DNS
ms.kybersoutez.cz
Software
nginx /
Resource Hash
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;

Request headers

Accept
text/event-stream
Cache-Control
no-cache
Referer
https://ctfd.nskb.dsal.cc/
accept-language
de-DE,de;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Wed, 06 Mar 2024 15:20:42 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload;
server
nginx
content-length
6710
content-type
text/html; charset=utf-8

Verdicts & Comments Add Verdict or Comment

12 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| init function| HowlerGlobal object| Howler function| Howl function| Sound object| CTFd number| uidEvent object| Alpine function| challengeContainerInterface function| challengeContainerManage function| challengeContainerTick function| challengeContainerLoop

1 Cookies

Domain/Path Name / Value
ctfd.nskb.dsal.cc/ Name: session
Value: ba4a884b-e1ac-4f06-962b-e1a2757d87f7.lGUbCWaHVtJcc5wppeHFxdehGxU

2 Console Messages

Source Level URL
Text
other warning URL: https://ctfd.nskb.dsal.cc/themes/core-beta/static/assets/index.697f72c1.js(Line 10)
Message:
The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://goo.gl/7K7WLu
network error URL: https://ctfd.nskb.dsal.cc/events
Message:
Failed to load resource: the server responded with a status of 403 ()

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
Strict-Transport-Security max-age=31536000; includeSubDomains; preload;