openbaarbasisonderwijsamsterdam.nl

.nl crawl

First seen 2026-06-01 · Last seen 2026-06-01 · ok HTTP/1.1 200 434 ms crawled 2026-06-02

BE · 83.217.71.143 · AS34762 Combell NV

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title: Home
Description: de website van de Federatie Openbaar Primair Onderwijs Amsterdam
Language: nl-nl
Generator: Joomla! - Open Source Content Management

Technology

Server: nginx
CMS: Joomla

DNS records live

NS

ns1.combell.eu
ns3.combell.net
ns4.combell.net

MX

10 mx.mailprotect.be
50 mx.backup.mailprotect.be

Email authentication weak

SPF: v=spf1 include:spf.byte.nl ?all
neutral (?all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

R12

from 2026-05-25 to 2026-08-23

Expires in 81 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://openbaarbasisonderwijsamsterdam.nl/

findings

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

Linked from (1)

awbr.nl×1