indexo.dev

moderndevtools.com

.com crawl

First seen 2026-06-01 · Last seen 2026-06-01 · ok HTTP/1.1 200 248 ms crawled 2026-06-02

US · 104.21.42.155 · AS13335 Cloudflare, Inc.

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
Modern DevTools - A video based web performance course
Description
Premium DevTools video course, advanced performance debugging, service workers, front end security and lots more
Language
en
Canonical
https://moderndevtools.com/

Technology

CDN
Cloudflare
Analytics
  • Cloudflare Insights
  • Google Analytics

Third-party hosts loaded (2)

  • static.cloudflareinsights.com×1
  • www.google-analytics.com×1

Social

Registration

Registrar
Squarespace Domains II LLC
Created
2017-02-21
Expires
2027-02-21 262 days left
Updated
2026-02-06
Name servers
  • gerald.ns.cloudflare.com
  • lara.ns.cloudflare.com

DNS records live

NS
  • gerald.ns.cloudflare.com
  • lara.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 partial

SPF
v=spf1 include:_spf.google.com ~all
softfail (~all)
DMARC
v=DMARC1; p=none; pct=100; rua=mailto:re+pbcevmgbuxw@dmarc.postmarkapp.com; sp=none; aspf=r;
policy: none (monitoring only) · sp=none
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-04-13 to 2026-07-12
Expires in 38 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://moderndevtools.com/

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

Links to (12)

Linked from (1)