sterrenkunde.nl

.nl crawl

First seen 2026-05-23 · Last seen 2026-05-31 · ok HTTP/1.1 200 2302 ms crawled 2026-05-28

SE · 13.53.101.199 · AS16509 Amazon.com, Inc.

Reputation 89/100 weak security headers dmarc monitor-only

sector education type homepage

HTML metadata

Title

Jongeren Werkgroep Sterrenkunde – Sterrenkunde voor Kinderen en Jongeren

Language

nl-NL

Generator

WordPress 6.9.4

Canonical

https://www.sterrenkunde.nl/jwg/

Feeds

Technology

Server: nginx
CMS: WordPress 6.9.4
PHP: 8.2.24 security-only
jQuery: 3.7.1

Fonts

Google Fonts

Third-party hosts loaded (3)

fonts.googleapis.com×2
calendar.google.com×1
gmpg.org×1

Social

Registration

Registrar

team.blue nl B.V.

Created

1999-06-07

Updated

2025-12-10

Name servers

ns0.transip.net
ns1.transip.nl
ns2.transip.eu

DNS records live

NS

ns0.transip.net
ns1.transip.nl
ns2.transip.eu

MX

10 pmf-1.surfcloud.nl
10 pmf-a.surfcloud.nl

Email authentication partial

SPF

v=spf1 ip4:145.100.190.144/28 ip6:2001:610:188:401::/64 ip4:192.87.110.0/24 ip6:2001:610:508:110::/64 include:servers.mcsv.net include:spf.eprov.nl include:pmf-spf.surfcloud.nl -all

strict (-all)

DMARC

v=DMARC1; p=none; rua=mailto:rua@sterrenkunde.nl; ruf=mailto:ruf@sterrenkunde.nl; ri=86400

policy: none (monitoring only)

DKIM

k1: k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUo…
k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…

selectors probed

Certificate (current)

R13

from 2026-03-30 to 2026-06-28

Expires in 26 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 35/100 Checked live page: https://sterrenkunde.nl/jwg/

present

permissions-policy

findings

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

Header values

permissions-policy: private-state-token-redemption=(self "https://www.google.com" "https://www.gstatic.com" "https://recaptcha.net" "https://challenges.cloudflare.com" "https://hcaptcha.com"), private-state-token-issuance=(self "https://www.google.com" "https://www.gstatic.com" "https://recaptcha.net" "https://challenges.cloudflare.com" "https://hcaptcha.com")