indexo.dev

oer-musik.de

.de crawl

First seen 2026-04-19 · Last seen 2026-05-13 · ok HTTP/1.1 200 1388 ms crawled 2026-05-13

US · 172.67.207.228 · AS13335 Cloudflare, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
OER | Ulrich Kaiser
Description
OER (Open Educational Resources) von Prof. Dr. Ulrich Kaiser
Language
de

Technology

CDN
Cloudflare

Social

Registration

Updated
2026-04-20
Name servers
  • cullen.ns.cloudflare.com.
  • maleah.ns.cloudflare.com.

DNS records live

NS
  • cullen.ns.cloudflare.com
  • maleah.ns.cloudflare.com
MX
  • 10 mx00.ionos.de
  • 10 mx01.ionos.de

Email authentication weak

SPF
v=spf1 include:_spf-eu.ionos.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-04-20 to 2026-07-19
Expires in 60 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://oer-musik.de/

present
  • x-content-type-options
  • referrer-policy
findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing Permissions Policy
Header values
referrer-policy
strict-origin-when-cross-origin
x-content-type-options
nosniff

Links to (1)

Linked from (1)