indexo.dev

csn.de

.de crawl

First seen 2026-04-24 · Last seen 2026-05-15 · ok HTTP/1.1 200 26970 ms crawled 2026-05-18

DE · 213.131.253.87 · AS61157 PlusServer GmbH

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
CSN Conferencing
Language
de

Technology

Server
nginx

Registration

Updated
2018-08-31
Name servers
  • ns1.prodns.de.
  • ns2.prodns.eu.
  • ns3.prodns.de.
  • ns4.prodns.eu.
  • ns5.prodns.de.

DNS records live

NS
  • ns1.prodns.de
  • ns2.prodns.eu
  • ns3.prodns.de
  • ns4.prodns.eu
  • ns5.prodns.de
MX
  • 10 mail.csn.de
TXT
  • brevo-code:d0e5ea84bf45ce59d8916ec1ed1e3cda

Email authentication partial

SPF
v=spf1 a mx ip4:91.233.84.0/22 -all
strict (-all)
DMARC
v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

E8
from 2026-04-24 to 2026-07-23
Expires in 65 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Linked from (2)