indexo.dev

networkdefense.io

.io crawl

First seen 2026-04-11 · Last seen 2026-05-18 · ok HTTP/1.1 200 3914 ms crawled 2026-05-18

US · 104.21.59.184 · AS13335 Cloudflare, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Applied Network Defense
Description
Affordable, effective, online information security training. Made by analysts, for analysts.
Language
en
Canonical
https://www.networkdefense.io/

Open Graph

url
https://www.networkdefense.io/
title
Applied Network Defense
site name
Applied Network Defense
description
Affordable, effective, online information security training. Made by analysts, for analysts.

Technology

CDN
Cloudflare
CMS
Gatsby
Analytics
  • Google Tag Manager
Third-party hosts loaded (7)
  • pathwright.imgix.net×5
  • prod-cdn.pathwright.com×2
  • www.googletagmanager.com×2
  • cdn.jsdelivr.net×1
  • js.stripe.com×1
  • maxcdn.bootstrapcdn.com×1
  • r.wdfl.co×1

DNS records live

NS
  • max.ns.cloudflare.com
  • mia.ns.cloudflare.com
MX
  • 1 aspmx.l.google.com
  • 10 alt3.aspmx.l.google.com
  • 10 alt4.aspmx.l.google.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com

Email authentication weak

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-03-23 to 2026-06-21
Expires in 33 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.networkdefense.io/p/course-list/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Linked from (1)