indexo.dev

secureflag.com

.com crawl

First seen 2026-05-28 · Last seen 2026-05-31 · ok HTTP/1.1 200 655 ms crawled 2026-05-31

US · 13.33.235.105 · AS16509 Amazon.com, Inc.

Reputation 100/100

Classifying

HTML metadata

Title
SecureFlag: Hands-On Secure Coding Training
Description
Secure Coding Training for Developers, DevOps, Cloud and QA Engineers. Write secure software from the very first keystroke.
Language
en

Open Graph

url
https://www.secureflag.com
title
SecureFlag Secure Coding Training Platform
video
https://www.youtube.com/watch?v=_fNyh60Sld4
description
Secure Coding Training for Developers, DevOps, Cloud and QA Engineers. Write secure software from the very first keystroke.

Technology

CDN
Amazon CloudFront
Server
nginx
JS framework
Angular 13.3.12
Analytics
  • Google Tag Manager
Fonts
  • Google Fonts

Third-party hosts loaded (5)

  • fonts.googleapis.com×1
  • fonts.gstatic.com×1
  • www.google.com×1
  • www.googletagmanager.com×1
  • www.gstatic.com×1

Social

Registration

Registrar
Amazon Registrar, Inc.
Created
2014-06-02
Expires
2027-06-02 366 days left
Updated
2026-05-16
Name servers
  • ns-1519.awsdns-61.org
  • ns-163.awsdns-20.com
  • ns-2041.awsdns-63.co.uk
  • ns-912.awsdns-50.net

DNS records live

NS
  • ns-1519.awsdns-61.org
  • ns-163.awsdns-20.com
  • ns-2041.awsdns-63.co.uk
  • ns-912.awsdns-50.net
MX
Show 6 MX records
  • 1 aspmx.l.google.com
  • 10 alt3.aspmx.l.google.com
  • 10 alt4.aspmx.l.google.com
  • 32767 ms74178880.msv1.invalid
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
TXT
  • MS=F1251B6D971F2708F8973AF2463CB74A30F634B7
Verified for
  • Atlassian
  • Google
  • Stripe
  • Zoho

Email authentication strong

SPF
v=spf1 ip4:103.84.217.15/32 ip4:103.84.217.238/32 ip4:103.89.75.238/32 ip4:121.244.91.48/32 ip4:121.244.91.52/32 ip4:122.15.156.182/32 ip4:13.247.164.219/32 ip4:134.128.64.0/19 ip4:134.128.96.0/19 ip4:135.84.80.0/24 ip4:135.84.81.0/24 ip4:135.84.82.0/24 ip4:135.84.83.0/24 ip4:136.143.160.0/24 ip4:136.143.161.0/24 ip4:136.143.162.0/24 ip4:136.143.168.0/22 ip4:136.143.168.0/24 ip4:136.143.170.0/24 ip4:136.143.176.0/24 ip4:136.143.177.0/24 ip4:136.143.178.49/32 ip4:136.143.182.0/23 ip4:136.143.184.0/24 ip4:136.143.188.0/24 ip4:136.143.190.0/23 ip4:139.167.79.86/32 ip4:149.72.0.0/16 ip4:159.183.0.0/16 ip4:165.173.128.0/24 ip4:165.173.180.1/32 ip4:165.173.180.250/31 ip4:165.173.182.250/31 ip4:165.173.189.205/32 ip4:167.89.0.0/17 ip4:168.245.0.0/17 ip4:169.148.129.0/24 ip4:169.148.131.0/24 ip4:169.148.138.0/24 ip4:169.148.142.10/32 ip4:169.148.142.33/32 ip4:169.148.144.0/25 ip4:169.148.144.10/32 ip4:169.148.146.0/23 ip4:169.148.174.10/32 ip4:169.148.175.3/32 ip4:169.148.179.3/32 ip4:169.148.188.0/24 ip4:169.148.188.182/32 ip4:185.172.198.0/24 ip4:185.172.199.0/24 ip4:185.20.209.0/24 ip4:185.20.211.0/24 ip4:185.230.214.0/23 ip4:192.254.112.0/20 ip4:195.154.60.200 ip4:198.21.0.0/21 ip4:198.37.144.0/20 ip4:199.127.232.0/22 ip4:199.255.192.0/22 ip4:199.34.22.36/32 ip4:199.67.72.0/22 ip4:199.67.80.2/32 ip4:199.67.80.20/32 ip4:199.67.82.2/32 ip4:199.67.82.20/32 ip4:199.67.84.0/24 ip4:199.67.86.0/24 ip4:199.67.88.0/24 ip4:199.67.90.0/24 ip4:204.141.32.0/23 ip4:204.141.42.0/23 ip4:206.55.144.0/20 ip4:208.117.48.0/20 ip4:209.85.128.0/17 ip4:216.221.160.0/19 ip4:217.182.241.115 ip4:223.165.113.0/24 ip4:223.165.115.0/24 ip4:223.165.118.0/23 ip4:223.165.120.0/23 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:24.110.64.0/18 ip4:31.186.226.0/24 ip4:31.186.243.0/24 ip4:34.241.242.183/32 ip4:43.239.212.33/32 ip4:50.31.32.0/19 ip4:51.15.253.103 ip4:51.15.34.108 ip4:51.91.164.78 ip4:52.6.74.205/32 ip4:54.240.0.0/18 ip4:54.240.64.0/18 ip4:56.124.6.228/32 ip4:65.154.166.0/24 ip4:69.169.224.0/20 ip4:74.125.0.0/16 ip4:76.223.128.0/19 ip4:76.223.176.0/20 ip4:8.39.54.0/23 ip4:8.39.54.250/31 ip4:8.40.222.0/23 ip4:8.40.222.250/31 ip4:89.36.170.0/24 ip4:91.134.56.180 ip4:91.134.60.158 ip4:91.135.68.104/29 ip6:2001:4860:4864::/56 ip6:2404:6800:4864::/56 ip6:2607:13c0:0001:0000:0000:0000:0000:7000/116 ip6:2607:13c0:0002:0000:0000:0000:0000:1000/116 ip6:2607:13c0:0004:0000:0000:0000:0000:0000/116 ip6:2607:f8b0:4864::/56 ip6:2800:3f0:4864::/56 ip6:2a00:1450:4864::/56 ip6:2c0f:fb50:4864::/56 ~all
softfail (~all)
DMARC
v=DMARC1;p=reject;pct=100;fo=1;rua=mailto:dmarc-reporting@secureflag.com
policy: reject (enforced)
DKIM
Show 4 DKIM selectors
  • google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxtGE54ynA2WR6cmZ9f5f4oWionXVzgvWI+/Uy4SOrJJCZufiyFhmHQ/0msFu6dWUqD7GexhzCThJrz…
  • k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3AqwxUg4ijiTwNbB6ub5qHDufA9tLHUQlAe5h2zwU3pLnSRT/J68Zd1XwAjsjI1boeWhWI7AEo6TCVqcro…
  • s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDsZxFReKMR7sCOsrLJ16U6Y2DfwY+KCn8INHeVsIezWgwnsHc0hCRnseoX5jvwle6li9Qh4z+H4aSgXw750xD8QO…
selectors probed

Certificate (current)

Amazon RSA 2048 M01
from 2025-11-24 to 2026-12-24
Expires in 206 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 90/100 Checked live page: https://www.secureflag.com/index.html

present
  • strict-transport-security
  • content-security-policy
  • x-frame-options
  • x-content-type-options
  • referrer-policy
  • permissions-policy
findings
  • CSP allows unsafe inline scripts/styles
  • CSP uses wildcard sources
Header values
referrer-policy
strict-origin-when-cross-origin
x-frame-options
DENY
permissions-policy
sync-xhr=self,fullscreen=self
x-content-type-options
nosniff
content-security-policy
default-src 'self'; script-src 'report-sample' 'self' https://*.secureflag.net https://*.secureflag.training https://*.secureflag.com https://cdn.signalzen.com https://*.google-analytics.com https://www.googleadservices.com https://www.google.com https://*.doubleclick.net https://www.googletagmanager.com https://www.gstatic.com https://static.ads-twitter.com/uwt.js https://www.redditstatic.com/ads/pixel.js https://snap.licdn.com/li.lms-analytics/insight.min.js https://*.googlesyndication.com https://js.zi-scripts.com https://tags.clickagy.com https://ddwl4m2hdecbv.cloudfront.net 'sha256-R6O9ne/CtoK78qqjSnB8Qw6tyD3PSLeHV082ihjaT/k=' 'sha256-LxYdyvvcMeGmnxW/TCPyaZ6rDJMojEvwZ6oe/7T8eAA=' 'sha256-JPNBxiqQ9GarUs+4H9WSHjM8SO32iqKSwh+cqHT/7CA=' 'sha256-YLKXEA+3nYO/0yfI33w8Mjrz3WhtshCuw/eIc72kwQ8' 'sha256-yU2oaYzQVn0U9jSUd9QRKnT6odCCOCfsLkS4uWRamaM=' 'sha256-cNNF6RQt1wTFM3eNBtKC3KPZOtZ/zIi36OHZhI9jyJw='; style-src 'report-sample' 'self' 'unsafe-inline' https://fonts.googleapis.com https://www
strict-transport-security
max-age=31536000; includeSubdomains;

Links to (3)

Linked from (2)