indexo.dev

mathekalender.de

.de crawl

First seen 2026-05-08 · Last seen 2026-05-15 · ok HTTP/1.1 200 861 ms crawled 2026-05-15

DE · 160.45.117.124 · AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Die Mathe-Adventskalender
Language
ger

Technology

Server
Apache

Registration

Updated
2019-10-18
Name servers
  • ns1.fu-berlin.de.
  • ns1.mi.fu-berlin.de.
  • ns2.fu-berlin.de.
  • ns2.mi.fu-berlin.de.
  • ns3.fu-berlin.de.

DNS records live

NS
  • ns1.fu-berlin.de
  • ns1.mi.fu-berlin.de
  • ns2.fu-berlin.de
  • ns2.mi.fu-berlin.de
  • ns3.fu-berlin.de
MX
  • 20 mail.fu-berlin.de

Email authentication weak

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

Certificate (current)

GEANT TLS RSA 1
from 2026-04-29 to 2026-11-14
Expires in 179 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://mathekalender.de/

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

Links to (4)

Linked from (1)