indexo.dev

gdsu.de

.de crawl

First seen 2026-05-08 · Last seen 2026-05-08 · ok HTTP/1.1 200 1100 ms crawled 2026-05-15

DE · 85.13.143.22 · AS34788 Neue Medien Muennich GmbH

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
gdsu.de | Gesellschaft für Didaktik des Sachunterrichts
Language
de

Technology

Server
Apache
CMS
Drupal
Fonts
  • Google Fonts

Third-party hosts loaded (2)

  • fonts.googleapis.com×3
  • maps.googleapis.com×1

Registration

Updated
2021-09-20
Name servers
  • ns1.tldns.net.
  • ns2.tldns.net.

DNS records live

NS
  • ns1.tldns.net
  • ns2.tldns.net
MX
  • 10 mail.gdsu.de

Email authentication weak

SPF
v=spf1 a mx ip4:89.107.66.192/26 ip4:89.107.69.0/26 ip4:62.108.36.0/24 ip4:62.108.41.0/24 ip4:62.108.44.0/24 ip4:84.19.26.0/24 ip4:84.19.24.0/24 ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-03-30 to 2026-06-28
Expires in 39 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://gdsu.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

Linked from (1)