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Security report for sidn.nl

SIDN · Technology · Netherlands

Low risk. 1 critical or high finding in GDPR outside view.

Security score

88/100

Risk levelLow

0–100, higher is better. How it is calculated

SIDN is the official registry operator for the .nl domain namespace in the Netherlands, providing domain registration services and cybersecurity solutions such as brand monitoring. The website is professionally designed, well-structured, and targets businesses and individuals interested in .nl domains and online security. The technical infrastructure leverages modern technologies including Algolia search, Google Tag Manager, and Piwik PRO analytics, with strong emphasis on privacy compliance and accessibility. Security posture is solid with HTTPS enforced and secure forms, though explicit security policies and incident response information are not publicly detailed. Overall, SIDN demonstrates a mature digital presence with high trustworthiness and business credibility.

Scanned

This is an earlier scan of sidn.nl. View the latest report

NIS2 and GDPR posture

GDPR outside view
73/ 100 · Medium
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

1 finding rated critical or high. Fix these first.

  1. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
90
Security headers
90
Email security
100
DNS health
75
Network security
100
GDPR outside view
73
Average
88

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

SIDN holds a dominant market position as the .nl domain registry, serving a broad customer base including registrars, businesses, and end-users. Their business model centers on domain registration and value-added cybersecurity services, supported by a research arm (SIDN Labs) that enhances their expertise and innovation. The company maintains active engagement through social media and publishes relevant news and research content, indicating a growth-oriented and transparent operational approach. Partnerships with SIDN Labs and statistical platforms strengthen their ecosystem and market intelligence capabilities.

Security posture

The website employs HTTPS and integrates privacy-respecting analytics tools with consent management, reflecting good security hygiene. However, the absence of a dedicated security policy page, incident response contacts, and vulnerability disclosure mechanisms such as security.txt suggests room for improvement in transparency and readiness. No vulnerabilities or exposed sensitive data were detected in the content. The security score is strong but could be enhanced by publishing formal security documentation and incident handling procedures.

Recommendations

  1. Publish a dedicated security policy page outlining security frameworks and practices.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publish a security.txt file to facilitate vulnerability disclosures.
  4. Disclose any relevant certifications or compliance attestations to enhance trust.
  5. Maintain and update privacy and cookie policies with clear user guidance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
SIDN
Description
SIDN manages the .nl domain namespace, offering domain registration services and cybersecurity solutions such as brand monitoring.
Key services
.nl domain registration, Whois lookup, Domain portfolio checker, Cybersecurity services including SIDN Merkbewaking, Registry services
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Algolia search, Google Tag Manager, Piwik PRO analytics, Usercentrics CMP
Performance
fast
Mobile
excellent
Accessibility
excellent
SEO
excellent

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Secure forms with proper input types
  • No exposed sensitive data in HTML
  • Use of privacy-compliant analytics

Analytics and tracking

Services
Piwik PRO, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Piwik PRO
Marketing tools
Usercentrics CMP
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with no blocking mechanisms.
  2. Content is in Dutch with English alternate available.
  3. Strong focus on .nl domain registration and cybersecurity services.
  4. Multiple forms for domain search and newsletter subscription.
  5. Social media presence on major platforms.
  6. Use of modern analytics and consent management tools.
  7. Good accessibility and SEO practices observed.
  8. No explicit security policy or incident response page found.
  9. No vulnerability disclosure or security.txt detected.
Technical notes

Notes

The website uses a modern tech stack with JavaScript frameworks, Algolia for search, and advanced analytics tools like Piwik PRO and Google Tag Manager. It is optimized for performance and mobile responsiveness, with strong SEO and accessibility features. The use of Usercentrics CMP indicates compliance with cookie consent regulations. No CMS was explicitly detected, suggesting a custom or proprietary platform. Hosting details are not explicit but the site loads quickly and reliably. Opportunities exist to further modernize by adding security headers and formalizing security documentation.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

Earlier scans of this domain

  1. 76/100Low15 findingsView report
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