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Security report for 51tcp.com

河南梯斯网络科技有限公司 · Technology · China

High risk. 9 critical or high findings in Email security, Security headers and 3 other checks.

Security score

47/100

Risk levelHigh

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

河南梯斯网络科技有限公司 operates the website 51tcp.com, presenting itself as a technology company specializing in network infrastructure services, including a large backbone node network and national cryptography level IP isolation. The company targets business and technical users in China, providing software downloads and a customer control panel. The website is built using the Astro framework and employs modern web technologies but lacks advanced SEO, accessibility, and security features. The domain is registered with DNSPod, Inc., a reputable Chinese DNS provider, and the domain age aligns with the company's founding year of 2017. Official Chinese regulatory licenses are displayed, enhancing trustworthiness. However, the site lacks privacy and cookie policies, contact information, and security headers, which are areas for improvement.

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

9 findings rated critical or high. Fix these first.

  1. 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

  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';…

  3. 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 51tcp.com

This scan found 27 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
62
Security headers
30
Email security
60
DNS health
60
Network security
20
GDPR outside view
50
Average
47

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 positions itself as a regional technology service provider in China, focusing on network infrastructure with a significant backbone node presence and cryptographic IP isolation. Its business model appears to be service-oriented, targeting enterprises requiring secure and reliable network solutions. The absence of detailed contact information and limited external partnerships visible on the site suggest a focused but possibly small-scale operation. The presence of official ICP and telecom licenses indicates regulatory compliance within China. The company uses a modern web framework but has room to enhance its digital maturity through improved SEO, accessibility, and security practices.

Security posture

The website currently exhibits a basic security posture. HTTPS is assumed but not explicitly confirmed in the provided data. No security headers such as Content Security Policy or HSTS are detected, and DNSSEC is not enabled, which could expose the domain to DNS spoofing risks. There is no evidence of vulnerability disclosures, incident response contacts, or security policies published on the site. The lack of privacy and cookie policies also indicates potential compliance gaps with GDPR or similar regulations. Overall, the security maturity is low to moderate, with recommendations to implement DNSSEC, security headers, and publish relevant policies to improve trust and compliance.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Implement and configure essential security headers such as Content Security Policy, HSTS, and X-Frame-Options.
  3. Publish comprehensive privacy and cookie policies to improve legal compliance and user trust.
  4. Add clear contact information including emails and phone numbers for customer support and incident response.
  5. Improve website accessibility and SEO by adding semantic HTML elements and meta tags.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
河南梯斯网络科技有限公司
Description
The company appears to provide network technology services, emphasizing a large backbone node network (10000+ nodes) and national cryptography level IP isolation.
Key services
Backbone network nodes, National cryptography level IP isolation, Software downloads, Control panel access for customers
Content quality
basic
Branding
consistent

Technology

Stack
Astro v4.0.6, CSS, WebP images
Frameworks
Astro
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
basic

Security

Observed score
40/100

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is accessible with no blocking or WAF challenges.
  2. No privacy, cookie, or terms of service policies found on the site.
  3. No contact emails or phone numbers explicitly provided on the homepage.
  4. Website uses Astro framework and modern image formats but lacks advanced SEO and accessibility features.
  5. Security headers and DNSSEC are not implemented, representing an area for improvement.
  6. Business information is primarily in Chinese and includes official Chinese regulatory licenses.
  7. No analytics or tracking scripts detected in the provided HTML content.
  8. No forms or data collection fields detected in the provided HTML content.
  9. External links limited to internal console and official Chinese government ICP verification site.
Technical notes

Notes

The website uses the Astro framework version 4.0.6, indicating a modern static site generation approach. The use of WebP images suggests optimization efforts for performance. However, the site lacks advanced SEO meta tags and accessibility features. No analytics or tracking scripts are detected, which may limit marketing insights but improves privacy. Hosting and DNS are managed by DNSPod, Inc., a reputable provider. Performance is moderate with basic mobile optimization. The absence of security headers and DNSSEC represents technical debt and potential security risks. Overall, the technical infrastructure is functional but could benefit from modernization and enhanced security configurations.
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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