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Security report for silesnet.cz

SilesNet s.r.o. · Telecommunications · Czech Republic

Medium risk. 8 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

63/100

Risk levelMedium

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

SilesNet s.r.o. is a regional telecommunications provider based in the Czech Republic, operating since 1998. The company specializes in delivering high-speed internet services via fiber optic and wireless technologies, targeting residential customers, businesses, and organizations. Their offerings include internet for apartments, houses, and enterprises, complemented by television services and dedicated technical support. The website reflects a stable market position with a focus on personalized customer service and regional expertise. Technically, the website employs modern web technologies including HTML5, CSS3, JavaScript, and popular libraries such as Swiper.js for UI components. Google Tag Manager and Google Analytics are used for tracking and analytics. The site is mobile-optimized with good SEO practices, though accessibility features are basic. Hosting appears to be provided by rails.cz, indicating a reliable infrastructure. From a security perspective, the site enforces HTTPS and implements a cookie consent mechanism, demonstrating awareness of privacy regulations. However, explicit security headers are missing, and no dedicated security or incident response policies are published. No vulnerabilities or exposed sensitive data were detected in the content. The WHOIS data confirms domain legitimacy with consistent registration details and a long operational history. Overall, the website presents a professional and trustworthy digital presence with room for improvement in privacy policy transparency and security header implementation. Strategic enhancements in these areas would strengthen compliance and security posture, supporting continued business growth and customer trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 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

8 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 silesnet.cz

This scan found 22 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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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

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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
20
Email security
70
DNS health
80
Network security
100
GDPR outside view
40
Average
63

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

SilesNet operates as a medium-sized regional ISP with a 27-year history, leveraging a hybrid fiber and wireless network to serve a diverse customer base including residential, commercial, and institutional clients. Their competitive advantage lies in deep local market knowledge and personalized service. Revenue streams likely derive from subscription-based internet and television services. The company maintains a focused partnership ecosystem with dedicated client portals and email services. Growth indicators include multi-language support and a broad tariff portfolio. The business model emphasizes reliability, customer-centricity, and regional specialization, positioning SilesNet as a trusted local telecommunications provider.

Security posture

The current security maturity level is moderate. HTTPS is enforced, and cookie consent is implemented, aligning with GDPR requirements. However, the absence of explicit security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options reduces defense-in-depth. No public security policy or incident response contacts are available, which may hinder timely vulnerability reporting and response. Data protection practices appear basic, with no visible data leakage or exposed credentials. The use of third-party scripts like Google Analytics introduces moderate tracking but is standard industry practice. Enhancing security headers and publishing clear security policies would improve compliance and resilience.

Recommendations

  1. Implement comprehensive security headers including CSP, HSTS, and X-Frame-Options to mitigate common web vulnerabilities.
  2. Publish a detailed privacy policy outlining GDPR compliance, data processing, and user rights.
  3. Establish and publicize an incident response policy with dedicated security contact channels (e.g., security@ or abuse@ emails).
  4. Regularly audit and update third-party scripts to minimize vulnerability exposure.
  5. Consider adopting a vulnerability disclosure program or security.txt file to encourage responsible reporting.

Contact details published on the site

Addresses
Legal name
SilesNet s.r.o.
VAT number
CZ25392280
Registration number
25392280
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
SilesNet s.r.o.
Description
Regionální poskytovatel internetu s 27 lety zkušeností, nabízí širokou škálu internetových tarifů pro domácnosti, firmy a organizace s kombinací optických a bezdrátových technologií. Poskytuje také televizní služby a technickou podporu.
Key services
internet do bytu, internet pro dům, internet pro firmy a organizace, televize, technická podpora
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Swiper.js, Google Tag Manager, Google Analytics
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • secure forms with hidden session and trace tokens
  • cookie consent mechanism

Analytics and tracking

Services
Google Analytics
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 is fully accessible with no blocking or WAF challenges.
  2. Content is professionally presented in Czech language targeting regional customers.
  3. No explicit privacy policy or terms of service pages found.
  4. Cookie consent mechanism is implemented and functional.
  5. Contact information is clearly provided including phone, email, physical address, and contact form.
  6. Use of modern JavaScript libraries and Google Analytics for tracking.
  7. No security.txt or vulnerability disclosure found.
  8. No explicit security headers detected in HTML content.
  9. WHOIS data confirms long-standing domain registration consistent with business claims.
Technical notes

Notes

The website is built on a modern, standards-compliant technology stack with responsive design and good SEO fundamentals. Use of Swiper.js enhances user experience with interactive sliders. Google Tag Manager and Analytics enable data-driven insights but require careful privacy management. Hosting on rails.cz suggests stable infrastructure. Performance is moderate with room for optimization. Accessibility is basic and could be improved to meet wider user needs. No CMS detected, indicating a custom or static site approach. Overall, the technical implementation supports business goals but could benefit from enhanced security and accessibility 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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