indexo.dev

linguu-learning.de

.de crawl

First seen 2026-05-10 · Last seen 2026-05-10 · ok HTTP/1.1 200 1708 ms crawled 2026-05-16

DE · 188.40.219.142 · AS24940 Hetzner Online GmbH

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Linguu
Description
A Linguu Project

Technology

Server
Apache

Third-party hosts loaded (1)

  • cdnjs.cloudflare.com×1

Registration

Updated
2025-05-09
Name servers
  • ns1.your-server.de.
  • ns3.second-ns.de.
  • ns.second-ns.com.

DNS records live

NS
  • ns.second-ns.com
  • ns1.your-server.de
  • ns3.second-ns.de
MX
  • 10 www650.your-server.de

Email authentication weak

SPF
v=spf1 +a +mx ?all
neutral (?all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-05-05 to 2026-08-03
Expires in 75 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://linguu-learning.de/

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

Linked from (1)