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Security report for dalu.cz

DALU, s.r.o. · Energy · Czech Republic

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

58/100

Risk levelMedium

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

DALU, s.r.o. is a Czech renewable energy company established in 2008, specializing in the design, installation, and servicing of photovoltaic and wind power plants for both businesses and households. The company positions itself as a stable and reliable provider in the Czech energy market, emphasizing quality, sustainability, and innovation. Their service portfolio includes comprehensive energy solutions, consulting, system monitoring, and recycling of solar panels. The website reflects a professional digital presence built on WordPress with the Divi theme, featuring clear branding and user-friendly navigation. Contact information is readily available, and GDPR compliance is addressed through dedicated policy pages and consent mechanisms. However, some security best practices such as security headers and incident response policies are not explicitly presented.

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

9 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 Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

  2. 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';…

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Keep watching dalu.cz

This scan found 25 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.

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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
62
Security headers
15
Email security
70
DNS health
75
Network security
100
GDPR outside view
25
Average
58

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 company targets both corporate and residential customers seeking renewable energy solutions, leveraging its long-standing market presence and professional reputation. DALU's competitive advantage lies in its tailored energy solutions, quality service, and comprehensive after-sales support. The business model focuses on project-based revenue from installations and ongoing service contracts. The company maintains partnerships and memberships in relevant industry organizations, enhancing credibility. Growth potential is supported by emerging trends in green energy and government subsidy programs. The website content and references indicate a focus on trust-building and customer engagement.

Security posture

The website uses HTTPS with a valid SSL certificate, ensuring encrypted communications. Security best practices such as nonce tokens in forms are implemented, reducing CSRF risks. However, the absence of security headers like Content Security Policy and HSTS reduces the overall security posture. No explicit incident response or vulnerability disclosure policies are found, which could impact preparedness and transparency. The Google Analytics plugin is present but not configured, limiting tracking risks. Overall, the security maturity is moderate with room for improvement in policy transparency and technical safeguards.

Recommendations

  1. Implement comprehensive security headers including CSP, HSTS, X-Frame-Options, and X-XSS-Protection to enhance browser security.
  2. Publish explicit security and incident response policies to improve transparency and preparedness.
  3. Add a cookie consent banner/mechanism to fully comply with GDPR cookie regulations.
  4. Regularly audit and update third-party plugins and scripts to mitigate vulnerabilities.
  5. Consider establishing a vulnerability disclosure policy and security.txt file to foster responsible reporting and trust.

Contact details published on the site

Addresses
Legal name
DALU, s.r.o.
VAT number
cz25934970
Registration number
25934970
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
DALU, s.r.o.
Description
Jsme stabilní Česká společnost působící v energetickém trhu od roku 2008. Nabízíme montáž a servis fotovoltaických elektráren pro firmy i domácnosti. Dodáváme komplexní energetická řešení pro snižování energetické náročnosti firem, specializujeme se na projektování a výstavbu fotovoltaických a větrných elektráren, poskytujeme servis a monitoring.
Key services
projektování a výstavba fotovoltaických elektráren, montáž a servis fotovoltaických elektráren, větrné elektrárny, servis a monitoring fotovoltaických systémů, poradenství a konzultace, recyklace solárních panelů, 3D návrhy a vizualizace
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress, Divi Theme, jQuery, Google Fonts
Frameworks
Divi
Platforms
WordPress
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Contact form with nonce and anti-CSRF tokens

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website is professionally designed with clear branding and consistent messaging.
  2. Contact information is prominently displayed including phone, email, and physical address.
  3. The site uses WordPress with Divi theme and includes modern web technologies.
  4. No explicit privacy or security policy pages beyond GDPR and cookie policy found.
  5. No evidence of security headers or advanced security policies.
  6. Google Analytics plugin present but not configured, indicating limited tracking.
  7. No signs of malicious or suspicious content or domains.
  8. Contact form includes consent checkbox for GDPR compliance.
  9. Company is a small Czech renewable energy provider with a focus on photovoltaic and wind energy solutions.
Technical notes

Notes

The website is built on WordPress using the Divi theme, a widely used and supported CMS and framework. It employs jQuery and Google Fonts for frontend functionality and styling. Hosting appears to be with WEDOS, a reputable Czech provider. The site is mobile responsive with good SEO metadata and structured content. Performance is moderate, with room for optimization in asset loading and caching. Accessibility features are basic but present. The technical stack is modern and suitable for the business needs, though security enhancements and performance tuning could further improve reliability and user experience.
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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