Skip to main content

Security report for onlineslots.nl

OnlineSlots.nl · Other · Netherlands

Medium risk. 4 critical or high findings in GDPR outside view and SSL/TLS.

Security score

72/100

Risk levelMedium

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

OnlineSlots.nl is a Dutch-focused online gambling affiliate and informational website established in 2013. It offers free online slot games, casino reviews, and detailed listings of game providers and legal Dutch casinos. The site targets Dutch-speaking adults interested in online slots and gambling, positioning itself as a niche player in the Dutch regulated gambling market. Technically, the site uses Joomla CMS with UIkit framework and integrates Google Tag Manager for analytics. The website is mobile-optimized and SEO-friendly with structured data markup. Security posture is moderate with HTTPS enabled and CSRF tokens present, but lacks advanced security headers and vulnerability disclosure mechanisms. Privacy compliance is weak due to missing privacy and cookie policies. Overall, the site is legitimate and trustworthy with a solid domain age and consistent WHOIS data, but could improve transparency and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
28/ 100 · High
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

4 findings 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.

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • 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

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

Need hands-on remediation? Email guard@offseq.com

Keep watching onlineslots.nl

This scan found 18 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

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

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. See sample alerts.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
75
Security headers
80
Email security
85
DNS health
65
Network security
100
GDPR outside view
28
Average
72

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

The business operates primarily as an affiliate marketing platform for online casinos licensed in the Netherlands, generating revenue through referrals and advertising. It maintains marketing agreements with several casino operators, indicating a partnership ecosystem. The content is curated to appeal to Dutch players, with localized language and compliance with Dutch gambling regulations (e.g., removal of auto-spin features). The site shows growth potential by adding new slot games and providers regularly. Its competitive advantage lies in its focused Dutch market approach and comprehensive slot game offerings. The business model relies on traffic from players seeking free and paid slot games and casino bonuses.

Security posture

The website demonstrates a basic to moderate security maturity level. HTTPS is enforced, and CSRF tokens are implemented, which are positive indicators. However, the absence of DNSSEC, security.txt, and explicit security headers such as Content-Security-Policy and X-Frame-Options indicates room for improvement. No exposed sensitive data or vulnerable libraries were detected in the HTML content. The lack of privacy and cookie policies is a compliance gap that could expose the business to regulatory risks. Incident response readiness and security culture indicators are not visible on the site.

Recommendations

  1. Implement and publish comprehensive privacy and cookie policies with user consent mechanisms to improve GDPR compliance.
  2. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  3. Add security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web attacks.
  4. Publish a security.txt file or vulnerability disclosure policy to facilitate responsible reporting of security issues.
  5. Regularly audit third-party scripts and dependencies to ensure no vulnerable libraries are included.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
OnlineSlots.nl
Description
Zoek je naar de beste online slots? Via deze site kan je meer dan 500 gratis gokkasten spelen die beschikbaar zijn bij legale casino's in Nederland.
Key services
Free online slot games, Casino reviews, Game provider listings, Casino bonus information
Content quality
good
Branding
consistent

Technology

Stack
Joomla CMS, UIkit CSS/JS framework, Velocity.js, Google Tag Manager
Frameworks
UIkit
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS enforced
  • CSRF token present in scripts
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
poor

Advertising

Transparency
basic

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
moderate

Key observations

  1. Website is fully accessible with no blocking or WAF challenges
  2. Content is focused on Dutch online slots and casino games
  3. No explicit privacy or cookie policies found
  4. Affiliate marketing is a key business model
  5. Use of modern web technologies and structured data for SEO
  6. No visible security incident response or vulnerability disclosure information
Technical notes

Notes

The website is built on Joomla CMS with UIkit frontend framework and uses JavaScript libraries like Velocity.js for UI animations. Google Tag Manager is integrated for analytics and marketing tracking. The site is mobile responsive and uses structured data (JSON-LD) for SEO enhancements. Performance is moderate with preloading of key scripts and images. Accessibility features are basic but present. The hosting provider is not explicitly identified. The site lacks advanced security headers and DNSSEC, which are technical risks. Overall, the infrastructure is modern but could benefit from security hardening and privacy compliance improvements.
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

Reviews of this site

Share your experience with onlineslots.nl. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review onlineslots.nl.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.