zdh-zert.de

.de crawl

First seen 2026-04-12 · Last seen 2026-05-19 · ok HTTP/1.1 200 3856 ms crawled 2026-05-09

DE · 78.35.1.162 · AS8422 NetCologne Gesellschaft fur Telekommunikation mbH

Reputation 94/100 dmarc monitor-only

sector b2b services type homepage

HTML metadata

Title: ZDH-ZERT Begutachtungspartner für Handwerk und Mittelstand
Language: de-DE

Technology

Analytics

Google Tag Manager

Fonts

Font Awesome

Third-party hosts loaded (5)

assets.kreative-nerds.de×12
cdn.jsdelivr.net×2
use.fontawesome.com×2
www.google.com×1
www.googletagmanager.com×1

Social

Contact

Email

Phone

0228985240

Registration

Updated

2017-12-18

Name servers

ns10.inch-media.de.
ns11.inch-media.de.
ns12.inch-media.de.
ns13.inch-media.de.

DNS records live

NS

ns10.inch-media.de
ns11.inch-media.de
ns12.inch-media.de
ns13.inch-media.de

MX

0 zdhzert-de0i.mail.protection.outlook.com
10 mail.zdh-zert.de
100 mail.inch-media.net

Verified for

Microsoft 365

Email authentication partial

SPF

v=spf1 ip4:144.208.214.205 include:spf.protection.outlook.com -all

strict (-all)

DMARC

v=DMARC1; p=none; rua=mailto:dmarc_agg@vali.email

policy: none (monitoring only)

DKIM

s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzqs8lOLAUFF1REtstKL7HfhaP/b4rKZPHDbF64XEV2ZkJvX891JOEmHAdy3yOSq6KWVkmhfAYR7UDE23HD…
s2: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2pdXwXcXkhpACxq03qavXqKNJR0RbQ4jEpW22jvJQg1CgYCDe+T9uvMkQcZRJMfrCdXQ6Q0f7ucABTwu4q…

selectors probed

Certificate (current)

Sectigo Public Server Authentication CA DV R36

from 2026-04-08 to 2026-10-24

Expires in 156 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 60/100 Checked live page: https://www.zdh-zert.de/de-de/

present

strict-transport-security
x-frame-options
referrer-policy

findings

missing Content Security Policy
weak frame protection
missing content type protection
missing Permissions Policy

Header values

referrer-policy: strict-origin
x-frame-options: ALLOW-FROM https://auditorenportal.zdh-zert.de
strict-transport-security: max-age=31536000; includeSubDomains