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Security report for dehn-ru.com

DEHN SE · Energy · Germany

Medium risk. 6 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

66/100

Risk levelMedium

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

DEHN SE is a well-established German family-owned company specializing in electrical protection solutions including lightning protection, surge protection, and occupational safety. With over 100 years of history and a strong international presence through subsidiaries and partner sites, DEHN serves industrial clients, energy sectors, and infrastructure operators. Their website reflects a mature digital presence built on Drupal 10, offering comprehensive product information, services, and training. The company demonstrates a strong market position as a trusted provider of electrical safety solutions. Technically, the website is modern, mobile-optimized, and uses Cloudflare DNS for reliability. Security posture is good with HTTPS and no visible vulnerabilities, though some security headers could be enhanced. Privacy compliance is well addressed with clear policies and consent mechanisms. Overall, DEHN SE presents a professional, trustworthy, and technically sound online presence.

Scanned

NIS2 and GDPR posture

GDPR outside view
45/ 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

6 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. 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 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 dehn-ru.com

This scan found 23 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

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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
65
Security headers
35
Email security
80
DNS health
70
Network security
100
GDPR outside view
45
Average
66

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

DEHN SE operates primarily in the energy and transportation sectors, providing specialized electrical protection products and services. Their business model focuses on B2B manufacturing and engineering services, supported by software tools and training programs. The company leverages a broad partnership ecosystem with multiple country-specific domains, enhancing market reach. Their long-standing history and comprehensive product portfolio position them as a market leader. The website content and structure support their business goals effectively, targeting technical professionals and industrial clients. Growth indicators include active social media engagement and continuous product innovation.

Security posture

The website employs HTTPS with a strong SSL configuration and uses Cloudflare DNS, indicating a secure hosting environment. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. However, explicit security headers like Content-Security-Policy and X-Frame-Options were not clearly identified and could be improved. There is no publicly visible security policy or incident response contact, which is a gap in transparency. Privacy policies and cookie consent mechanisms are well implemented, supporting GDPR compliance. Overall, the security posture is solid but could benefit from enhanced header policies and published incident response information.

Recommendations

  1. Implement and verify comprehensive security headers such as CSP, X-Frame-Options, and X-Content-Type-Options to strengthen browser security.
  2. Publish a dedicated security policy page including incident response procedures and contact channels to improve transparency and trust.
  3. Consider adding a security.txt file to facilitate responsible vulnerability disclosure.
  4. Regularly audit third-party scripts and tracking tools to ensure privacy compliance and minimize user tracking.
  5. Maintain and update CMS and dependencies to mitigate potential vulnerabilities and technical debt.

Contact details published on the site

Addresses
Legal name
DEHN SE
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
DEHN SE
Description
Zuverlässiger Schutz von Gebäuden, elektrischen und elektronischen Anlagen sowie Menschenleben. Spezialisiert auf Blitzschutz, Überspannungsschutz und Arbeitsschutz.
Key services
Blitzschutz (Lightning Protection), Überspannungsschutz (Surge Protection), Arbeitsschutz (Occupational Safety), Engineering Services, Product Configuration and Selection, Training and Education (DEHNacademy), Software for Lightning Protection Planning (DEHNplan)
Content quality
excellent
Branding
consistent

Technology

Stack
Drupal 10, Google Tag Manager, Cloudflare DNS, SVG icons, Responsive CSS
Frameworks
Drupal
Platforms
Web
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of Google Tag Manager with defer script loading
  • No visible vulnerable libraries

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website is professionally designed and fully accessible.
  2. Content is comprehensive and well-structured.
  3. Multiple subsidiaries and partner sites are linked.
  4. No signs of blocking or WAF challenges.
  5. Security headers could be improved.
  6. Privacy and cookie policies are present and GDPR compliant.
  7. No explicit security policy or incident response contact found.
  8. Use of modern CMS (Drupal 10) and technologies.
  9. Social media presence is active and linked.
  10. Contact information is clearly provided in footer and contact pages.
Technical notes

Notes

The website is built on Drupal 10, a modern and robust CMS platform, ensuring maintainability and scalability. The use of SVG icons and responsive CSS indicates attention to modern web standards and mobile optimization. Google Tag Manager is used for analytics and marketing, showing integration with common digital marketing tools. Hosting via Cloudflare DNS provides resilience and performance benefits. The site loads with moderate speed and includes accessibility features such as skip links and proper ARIA roles. SEO is supported by meta tags and Open Graph data. Technical risks are minimal, but the absence of some security headers and explicit incident response information are areas for improvement.
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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