indexo.dev

claudius-schule.de

.de crawl

First seen 2026-04-14 · Last seen 2026-05-08 · ok HTTP/1.1 200 6601 ms crawled 2026-05-08

DE · 157.97.45.55 · AS15817 Mittwald CM Service GmbH & Co. KG

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
Schulbuch | Claudius Verlag München 2
Language
de
Generator
Drupal 11 (https://www.drupal.org)
Canonical
https://www.claudius-schule.de/

Technology

Server
Apache
CMS
Drupal

Third-party hosts loaded (1)

  • cdn.jsdelivr.net×3

Social

Registration

Updated
2025-11-24
Name servers
  • dns1.csaonline.de.
  • dns2.csaonline.de.

DNS records live

NS
  • dns1.csaonline.de
  • dns2.csaonline.de
MX
  • 10 mailx3-in-a.csaonline.de
  • 20 mailx3-in-b.csaonline.de

Email authentication weak

SPF
v=spf1 include:_spf.csaonline.de a mx -all
strict (-all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-03-11 to 2026-06-10
Expires in 21 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://www.claudius-schule.de/

present
  • x-frame-options
  • x-content-type-options
findings
  • missing HSTS
  • missing Content Security Policy
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff

Links to (4)

Linked from (1)