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Security report for dynu.com

Dynu Systems, Inc. · Technology · United States

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

74/100

Risk levelMedium

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

Dynu Systems, Inc. is a technology company specializing in dynamic DNS services, domain registration, email hosting, SSL certificates, and cloud VPS solutions. Established since 1997 and based in the United States, Dynu positions itself as a reliable and affordable provider with over 15 years of experience and ICANN accreditation. Their offerings target individuals and businesses requiring dynamic IP management and related internet services. The website presents a professional and user-friendly interface with clear navigation and multilingual support. Technically, the website employs modern web technologies including jQuery, Bootstrap, Google Tag Manager, and Twitter widgets. It is mobile-optimized and SEO-friendly, though performance is moderate. Security is enforced through HTTPS, but lacks some advanced security headers and explicit cookie consent mechanisms. The absence of WHOIS data limits full verification of domain legitimacy, though the website content and trust signals like ICANN accreditation support its credibility. Security posture is solid with no visible vulnerabilities or exposed sensitive data, but improvements are recommended in security header implementation and privacy compliance. The company provides contact via email and support forms, with active social media presence enhancing engagement. Overall, Dynu demonstrates a mature digital presence with room for enhanced security and privacy practices. Strategically, Dynu should focus on improving transparency around privacy and security policies, implement cookie consent to align with GDPR, and publish a vulnerability disclosure policy to strengthen trust. Verifying and publishing domain registration details would also enhance legitimacy and business credibility.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 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

4 findings rated critical or high. Fix these first.

  1. 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 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';…

  2. GDPR outside view

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

    • 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

  3. 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 Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching dynu.com

This scan found 19 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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Full report

€39.90one-time

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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
72
Security headers
65
Email security
70
DNS health
85
Network security
100
GDPR outside view
53
Average
74

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

Dynu operates in the competitive dynamic DNS and domain registration market, leveraging its long-standing presence and ICANN accreditation as key differentiators. Its business model combines free services to attract users with paid upgrades for advanced features, targeting both individual users and small to medium businesses. The company’s service ecosystem includes DNS management, email hosting, SSL certificates, and VPS hosting, enabling cross-selling opportunities. The website’s multilingual support and comprehensive tutorials indicate a focus on user empowerment and global reach. Partnerships with ICANN and social media engagement support brand visibility. Growth potential lies in expanding VPS offerings and enhancing security compliance to meet evolving regulatory demands.

Security posture

Dynu exhibits a moderate to strong security posture with mandatory HTTPS and no apparent exposure of sensitive information. However, the lack of security headers such as Content Security Policy, HSTS, and X-Frame-Options represents a gap that could be exploited. The absence of a published security policy or incident response plan reduces transparency. No security.txt or vulnerability disclosure mechanisms were found, limiting coordinated vulnerability reporting. Privacy compliance is partial, with no cookie consent banner despite GDPR relevance. Incident response contact is available via abuse reporting. Overall, the security maturity is adequate but could be significantly improved by adopting best practices in headers, privacy notices, and vulnerability management.

Recommendations

  1. Implement comprehensive security headers including CSP, HSTS, X-Frame-Options, and X-XSS-Protection to harden the website against common attacks.
  2. Deploy a cookie consent mechanism to comply with GDPR and enhance user privacy transparency.
  3. Publish a detailed security policy and incident response plan accessible from the website to improve trust and preparedness.
  4. Create and maintain a security.txt file to facilitate responsible vulnerability disclosure and improve security collaboration.
  5. Verify and publicly display domain registration details to strengthen legitimacy and business credibility.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Dynu Systems, Inc.
Description
Dynu Systems, Inc. provides free dynamic DNS service as well as other services such as domain registration, email and SSL services.
Key services
Dynamic DNS, Domain Registration, Email Services, SSL Certificates, Cloud VPS
Content quality
good
Branding
consistent

Technology

Stack
jQuery 3.5.0, Google Tag Manager, Bootstrap (modal, navbar), FontAwesome (icons), Google Fonts (Open Sans), Twitter widgets
Frameworks
Bootstrap
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of secure cookies (implied by HTTPS)
  • No vulnerable libraries detected

Analytics and tracking

Services
Google Analytics (via Google Tag Manager)
Tracking level
moderate
Privacy practices
basic

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website provides comprehensive DNS and domain services with free and paid options.
  2. No WHOIS data available, possibly due to privacy or domain status.
  3. No explicit cookie consent mechanism found despite GDPR relevance.
  4. Good use of modern web technologies and responsive design.
  5. Security headers missing; HTTPS enforced.
  6. Contact information primarily via email and contact form; no phone numbers found.
  7. Social media presence active on Twitter, Facebook, Google Plus.
  8. No visible security.txt or vulnerability disclosure page.
  9. ICANN accreditation prominently displayed as trust signal.
Technical notes

Notes

The website uses a modern technology stack with jQuery 3.5.0, Bootstrap for responsive design, Google Tag Manager for analytics, and Twitter widgets for social media integration. The site is mobile-optimized and SEO-friendly with proper meta tags and structured data (JSON-LD). Performance is moderate, with asynchronous loading of scripts and partial content loading for dynamic elements. No CMS was detected, suggesting a custom or proprietary platform. Hosting provider details are not disclosed. Technical debt appears low, but the absence of security headers and cookie consent indicates areas for modernization. Overall, the technical implementation supports a stable and user-friendly experience with opportunities for enhanced security and privacy features.
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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