indexo.dev

offene-schule-koeln.de

.de crawl

First seen 2026-04-26 · Last seen 2026-05-19 · ok HTTP/1.1 200 5590 ms crawled 2026-05-19

DE · 178.63.45.92 · AS24940 Hetzner Online GmbH

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
Offene Schule Köln | Eine Schule für Alle
Description
Offene Schule Köln - Inklusive Gesamtschule in Köln, durch individuelle Förderung führen wir Kinder zum bestmöglichen Schulabschluss.
Language
de
Generator
Contao Open Source CMS

Technology

Server
nginx

Third-party hosts loaded (1)

  • cdn.eye-able.com×2

Contact

Phone

Registration

Updated
2026-05-12
Name servers
  • ns1.domainoffensive.de.
  • ns2.domainoffensive.eu.
  • ns3.domainoffensive.net.

DNS records live

NS
  • ns1.domainoffensive.de
  • ns2.domainoffensive.eu
  • ns3.domainoffensive.net
MX
  • 0 offeneschulekoeln-de01e1c.mail.protection.outlook.com
Verified for
  • Apple
  • Microsoft 365

Email authentication partial

SPF
v=spf1 include:spf.protection.outlook.com -all
strict (-all)
DMARC
v=DMARC1; p=none; pct=100; rua=mailto:it@offene-schule-koeln.de; ruf=mailto:it@offene-schule-koeln.de
policy: none (monitoring only)
DKIM
  • selector1: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDu/ts6kt1/eTlvySBLTnOUg6TLAvG7Y/HCsFy3yhrm4g9626294kbKQh/0JkbIlwd+C5obj/+iuymmJPstQi…
selectors probed

Certificate (current)

Thawte TLS RSA CA G1
from 2025-10-06 to 2026-10-22
Expires in 154 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.offene-schule-koeln.de/offene-schule-koeln-willkommen/

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

Linked from (1)