indexo.dev

acourse.de

.de crawl

First seen 2026-04-15 · Last seen 2026-05-07 · ok HTTP/1.1 200 432 ms crawled 2026-05-11

DE · 162.55.210.180 · AS24940 Hetzner Online GmbH

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Softwareentwicklung & Digitalisierung aus Köln | acourse
Description
Als Softwareentwickler aus Köln bieten wir individuelle Lösungen – von Webseiten bis Anwendungen & Cloud-Services – speziell für kleine Unternehmen.
Language
de

Open Graph

url
https://www.acourse.de/
title
Softwareentwicklung & Digitalisierung aus Köln | acourse
site name
acourse Webseite
description
Als Softwareentwickler aus Köln bieten wir individuelle Lösungen – von Webseiten bis Anwendungen & Cloud-Services – speziell für kleine Unternehmen.

Technology

CMS
Next.js

Social

Contact

Email
Phone
Address
KölnAuf dem Hügel 450999

Registration

Updated
2025-08-01
Name servers
  • root-dns.netcup.net.
  • second-dns.netcup.net.
  • third-dns.netcup.net.

DNS records live

NS
  • root-dns.netcup.net
  • second-dns.netcup.net
  • third-dns.netcup.net
MX
  • 0 acourse-de.mail.protection.outlook.com
TXT
  • apple-domain-verification=8nLh0KZqTHjm5tGm
  • google-site-verification=MqQTcIKnzEMemNxTO4-cC0GgUKC6UtH5imKiFQPQCsM
  • MS=ms64670832

Email authentication strong

SPF
v=spf1 include:spf.protection.outlook.com -all
strict (-all)
DMARC
v=DMARC1; p=quarantine;
policy: quarantine
DKIM
  • selector1: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzgPOG7Cmg9UpOYplH8lNdpz8/FNL2uxOFyUtNQIdEF95ksw4c4JB+vbZwU7Pa1cM8G95uVdlbyYVBO…
  • selector2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqAJY6WzW2e7m4T8gj/Wpxu/0OPbCauhD59CkDzBBp7JI/icuenj7IZO5uU/lAo7hNR2wOwkXfEMo2R…
  • mail: v=DKIM1; h=sha256; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAw4pbP/imZ03u6wZXdbr9xE8gI1kzmAJTQDzbWWgwv5Rl6hiVSaKLVAo6quXsD0BmNogI…
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyZLA/G0ZKS9ixBoYA4LH3CHBh1ttPs0cNCktdNfVah5HJV1c2UypShSS7t8v24PCWO2vMaOhSVjTwbWTUM…
  • s2: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzga4pvtn0a379F9ScMAgj4Ljhl+/ME0e0VHDtYpLW2W7EwQtyNINqEG5fBkv9yvMKvrOWAL276haqGs5Ze…
selectors probed

Certificate (current)

R13
from 2026-04-09 to 2026-07-08
Expires in 51 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://acourse.de/

present
  • content-security-policy
findings
  • missing HSTS
  • CSP allows unsafe inline scripts/styles
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
content-security-policy
default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://maps.googleapis.com https://intern.acourse.de; child-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; img-src 'self' https://raw.githubusercontent.com; font-src 'self'; frame-src 'self'; connect-src 'self' https://maps.googleapis.com intern.acourse.de

Links to (9)

Linked from (1)