indexo.dev

zierhut-networks.de

.de dns crawl

First seen 2026-05-07 · Last seen 2026-05-19 · ok HTTP/1.1 200 1390 ms crawled 2026-05-14

FR · 178.238.235.181 · AS51167 Contabo GmbH

Reputation 89/100 weak security headers dmarc monitor-only

sector other type homepage

HTML metadata

Title
Zierhut Networks

Technology

Server
Apache

Third-party hosts loaded (1)

  • www.teamviewer.com×1

Contact

Email

Registration

Updated
2021-04-23
Name servers
  • ns1.zierhut-networks.de.
  • ns2.zierhut-networks.de.
  • ns3.zierhut-networks.de.

DNS records live

NS
  • ns1.zierhut-networks.de
  • ns2.zierhut-networks.de
  • ns3.zierhut-networks.de
MX
  • 10 mail.zierhut-networks.de
Verified for
  • Google
  • Microsoft 365

Email authentication partial

SPF
v=spf1 include:spf.zierhut-networks.de a:dispatcher1.serverguard24.de a:dispatcher2.serverguard24.de a:mail.serverguard24.de include:ispgateway.de include:spf.mailjet.com -all
strict (-all)
DMARC
v=DMARC1; p=none; rua=mailto:a0fdd69ac87a.a@dmarcinput.com; ruf=mailto:a0fdd69ac87a.f@dmarcinput.com; fo=1
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

Sectigo Public Server Authentication CA DV R36
from 2025-12-08 to 2026-10-31
Expires in 163 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://www.zierhut-networks.de/

present
  • strict-transport-security
findings
  • short HSTS max-age
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=0

Links to (2)