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Security report for test-ipv6.cz

CZ.NIC z.s.p.o · Technology · Czech Republic

Medium risk. 10 critical or high findings in GDPR outside view, Email security and 2 other checks.

Security score

55/100

Risk levelMedium

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

The website test-ipv6.cz is a specialized technical service operated by CZ.NIC z.s.p.o, a Czech domain registry organization. It provides IPv6 connectivity testing tools that help users and network administrators verify their IPv6 readiness and diagnose potential issues. The site is positioned as a niche technical resource with a focus on IPv6 adoption and network diagnostics. The business model appears to be a free service supported by CZ.NIC and community contributions, targeting technically savvy users and ISPs. From a technical perspective, the website uses standard web technologies including JavaScript, jQuery, and Piwik analytics. The hosting provider is identified as HETZNER-AS based on IP and ISP data. The site performs moderately in performance and mobile optimization, with basic accessibility and SEO features. The technical infrastructure is functional but could benefit from modern security headers and enhanced mobile responsiveness. Security posture is moderate; the site uses HTTPS for test URLs and avoids exposing sensitive data. However, it lacks explicit security headers such as Content-Security-Policy and HSTS, and does not publish privacy or cookie policies, which are compliance gaps. No incident response or vulnerability disclosure information is provided. The WHOIS data confirms domain legitimacy with consistent registration by CZ.NIC since 2011. Overall, the website is a trustworthy and useful technical resource with good business credibility but has room for improvement in privacy compliance and security best practices. Strategic recommendations include implementing privacy and cookie policies, adding security headers, and publishing vulnerability disclosure and incident response details to enhance trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
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

10 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

  2. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  3. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

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

Keep watching test-ipv6.cz

This scan found 26 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.

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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
47
Security headers
15
Email security
60
DNS health
80
Network security
100
GDPR outside view
25
Average
55

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 website operates in the technology sector, specifically focusing on IPv6 connectivity testing. It serves a niche market of internet users, network administrators, and ISPs interested in IPv6 readiness. The business model is likely non-commercial or community-supported, with no evident revenue streams from advertising or affiliate programs. The site benefits from association with CZ.NIC, a reputable Czech domain registry, which enhances its credibility. The partnership ecosystem includes nic.cz and related IPv6 test domains. Growth indicators are limited but the site fulfills a specialized technical need. Competitive advantages include detailed IPv6 testing tools and transparent technical information. The target customer segment is technically proficient users and organizations preparing for IPv6 adoption.

Security posture

The security maturity level of the website is moderate. HTTPS is used for test URLs, ensuring encrypted communication. However, the absence of key security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security reduces protection against common web attacks. No privacy or cookie policies are published, indicating compliance gaps with GDPR and related regulations. There is no publicly available incident response or vulnerability disclosure information, which limits transparency and readiness for security incidents. Data protection practices appear minimal, with no exposed sensitive data detected. The use of Piwik analytics suggests moderate user tracking without advanced marketing tools. Overall, the security culture appears functional but could be improved by adopting best practices and compliance measures.

Recommendations

  1. Implement comprehensive privacy and cookie policies to improve GDPR compliance.
  2. Add security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to enhance security posture.
  3. Publish a vulnerability disclosure policy and incident response contact information to increase transparency and readiness.
  4. Improve mobile optimization and accessibility to enhance user experience across devices.
  5. Regularly review and update analytics and tracking practices to align with privacy best practices.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
CZ.NIC z.s.p.o
Description
A website providing IPv6 readiness testing tools for browsers and internet connections, showing IPv4 and IPv6 addresses and ISP information.
Key services
IPv6 connectivity testing, ISP identification, Diagnostic tools for IPv6 readiness
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, jQuery, Piwik Analytics, CSS, HTML5
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
basic

Security

Observed score
60/100
Good practices seen
  • Use of HTTPS for test URLs
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Piwik
Tracking level
moderate
Privacy practices
poor

Advertising

Tracking pixels
Piwik
Transparency
basic

Site quality

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

Key observations

  1. Website provides a specialized IPv6 connectivity testing service.
  2. No privacy or cookie policies found, which is a compliance gap.
  3. Contact information is available via email and contact form.
  4. No explicit security or incident response policies published.
  5. Use of Piwik analytics indicates some user tracking but no advanced marketing or advertising detected.
  6. Technical implementation is functional but basic with room for improvement in security headers and mobile optimization.
  7. No signs of adult or questionable content; content is safe and technical.
  8. WHOIS data supports legitimacy and consistent ownership.
Technical notes

Notes

The website uses a traditional web technology stack including JavaScript, jQuery, and Piwik analytics for tracking. Hosting is provided by HETZNER-AS, a reputable hosting provider. Performance is moderate with basic mobile responsiveness and accessibility features. The site lacks modern security headers and comprehensive privacy mechanisms. There is no detected CMS, indicating a custom or static site architecture. Technical debt is low but modernization opportunities exist in security and privacy compliance. The infrastructure supports the niche technical function effectively but could benefit from enhanced SEO and mobile optimization to broaden reach and usability.
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

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