indexo.dev

john-softwareentwicklung.de

.de crawl

First seen 2026-06-04 · Last seen 2026-06-04 · ok HTTP/1.1 200 1002 ms crawled 2026-06-04

DE · 94.130.113.90 · AS24940 Hetzner Online GmbH

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Christian John - Christian John Softwareentwicklung
Description
Christian John Softwareentwicklung aus Korschenbroich bei Düsseldorf. Gestaltung und Entwicklung von individueller webbasierter Software.
Language
de
Generator
CMS CONTENIDO 4.10

Technology

Server
Apache
jQuery
3.2.1 known XSS (<3.5)

Social

Contact

Email
Phone

Registration

Updated
2025-11-12
Name servers
  • ns1.domainers.de.
  • ns2.domainers.de.
  • ns3.domainers.de.
  • ns4.domainers.de.

DNS records live

NS
  • ns1.domainers.de
  • ns2.domainers.de
  • ns3.domainers.de
  • ns4.domainers.de
MX
  • 10 mail.john-server.de
Verified for
  • Google
  • Microsoft 365

Email authentication strong

SPF
v=spf1 a mx -all
strict (-all)
DMARC
v=DMARC1; p=reject; rua=mailto:support@john-server.de
policy: reject (enforced)
DKIM
  • default: v=DKIM1; h=sha256; k=rsa; s=email; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvmPMMNGNPoy9u+XdwT5hEYljqiUF1wnGQJGtIYC8u8pJTdwwx1z3XRLjyzk…
selectors probed

Certificate (current)

R12
from 2026-04-13 to 2026-07-12
Expires in 38 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://www.john-softwareentwicklung.de/christianjohn/index.html

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=1209600

Links to (4)

Linked from (1)