indexo.dev

html5sec.org

.org crawl

First seen 2026-04-15 · Last seen 2026-05-07 · ok HTTP/1.1 200 999 ms crawled 2026-05-10

FR · 92.205.58.180 · AS21499 Host Europe GmbH

Reputation 64/100 listed in spam blocklist weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
HTML5 Security Cheatsheet

Technology

Server
Apache

Third-party hosts loaded (1)

  • camo.githubusercontent.com×1

Social

Registration

Registrar
united-domains GmbH
Created
2010-12-06
Expires
2026-12-06 200 days left
Updated
2026-04-04
Name servers
  • ns.udag.org
  • ns.udag.de
  • ns.udag.net

DNS records live

NS
  • ns.udag.de
  • ns.udag.net
  • ns.udag.org
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; rua=mailto:mario@html5sec.org; ruf=mailto:mario@html5sec.org; rf=afrf; sp=none; fo=1; ri=86400
policy: none (monitoring only) · sp=none
DKIM
  • google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhAwtPD3mi+AjHe9Re9x/CBgurCbt9keWXBrhuOYfwKmgjvIZcbGblP5UNRLIyCjq0EPrGdZz0igAJr…
selectors probed

Certificate (current)

R12
from 2026-05-07 to 2026-08-05
Expires in 78 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://html5sec.org/

present
  • cross-origin-resource-policy
findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
cross-origin-resource-policy
cross-origin

Links to (2)

Linked from (1)