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Security report for 51dns.com

帝恩思 · Technology · China

Medium risk. 7 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

62/100

Risk levelMedium

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

The website www.51dns.com represents 帝恩思, a Chinese publicly listed company founded in 2012 specializing in digital security comprehensive services including DNS resolution, DNS hijacking protection, SSL certificates, and website monitoring. The company positions itself as a global leader in digital security solutions, targeting enterprises requiring robust online security. The website is professionally designed, mobile-optimized, and uses modern web technologies including Baidu Analytics for tracking. Security posture is good with HTTPS and SSL certificates in place, but lacks explicit security headers and privacy compliance disclosures. WHOIS data is missing, which raises concerns about domain registration transparency but does not negate the professional business presence. Overall, the website is trustworthy and functional but would benefit from enhanced privacy policies and clearer contact information.

Scanned

NIS2 and GDPR posture

GDPR outside view
50/ 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

7 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 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';…

  2. GDPR outside view

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

    • 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

    • 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

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

Keep watching 51dns.com

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.

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
67
Security headers
15
Email security
70
DNS health
70
Network security
100
GDPR outside view
50
Average
62

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

帝恩思 operates in the technology sector focusing on digital security services. It is a medium-sized enterprise publicly listed on the New Third Board in China, indicating a stable market position. The company offers a suite of security services including DNS and application security monitoring, targeting business clients. The business model is B2B with a focus on security infrastructure and monitoring solutions. The website content and branding are consistent, supporting the company’s market positioning. No direct partnerships or subsidiaries are identified from the website content. The use of Baidu Analytics suggests a focus on Chinese market analytics and user behavior tracking.

Security posture

The website employs HTTPS and SSL certificates, indicating encrypted communications. However, no explicit security headers such as Content-Security-Policy or X-Frame-Options were detected in the HTML content. No forms were found, reducing attack surface from input vectors. Privacy and cookie policies are absent, which is a compliance gap especially under GDPR. No vulnerability disclosures or incident response contacts are provided. The security score is moderate, with recommendations to implement security headers, publish privacy and cookie policies, and provide incident response contacts to improve trust and compliance.

Recommendations

  1. Implement and publish comprehensive privacy and cookie policies with user consent mechanisms.
  2. Add security headers like Content-Security-Policy, X-Frame-Options, and X-XSS-Protection to enhance browser security.
  3. Provide clear contact information including security incident response and data protection officer contacts.
  4. Publish a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  5. Enhance accessibility features and SEO optimizations to improve user experience and compliance.

Contact details published on the site

Legal name
帝恩思
Registration number
证券代码 837018
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
帝恩思
Description
帝恩思是 2012 年成立的新三板挂牌企业（证券代码 837018），致力成为全球知名数字安全综合服务商。帝恩思通过创新技术打造数字资产安全产品、应用安全监测和域名安全服务，保护在线业务免受网络威胁。优势包括数字资产安全服务、应用安全监测服务、域名安全服务，公司服务团队为众多企业提供数字安全解决方案。
Key services
digital asset security services, application security monitoring, domain name security services, free DNS resolution, cloud DNS resolution, DNS hijacking protection, SSL certificates, website hijacking detection, downtime monitoring
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, CSS, HTML5, Baidu Analytics, Swiper.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Use of SSL certificates
  • DNS hijacking protection services

Analytics and tracking

Services
Baidu Analytics
Tracking level
moderate
Privacy practices
poor

Advertising

Tracking pixels
Baidu Analytics
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. WHOIS data is missing, indicating possible privacy protection or domain registration issues.
  3. Website content is professional and focused on digital security services.
  4. No explicit privacy or cookie policies found, indicating compliance gaps.
  5. Contact information is not explicitly found in the HTML content.
  6. Use of Baidu Analytics indicates tracking but no clear privacy disclosures.
  7. No obvious security vulnerabilities detected in the HTML content.
  8. Website uses HTTPS and SSL certificates.
  9. No forms detected in the provided HTML snippet.
  10. No social media links explicitly found in the HTML content.
Technical notes

Notes

The website uses standard web technologies including HTML5, CSS, and JavaScript with external libraries such as Swiper.js for UI components and Baidu Analytics for tracking. The site is mobile-optimized and loads with moderate performance. No CMS or hosting provider information was detected. The absence of security headers and privacy compliance features indicates areas for technical improvement. The domain WHOIS data is missing, which may indicate privacy protection or registration issues. Overall, the technical infrastructure supports the business needs but can be enhanced for security and compliance.
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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