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Security report for sit21.cz

Síť21 · Telecommunications · Czech Republic

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

Security score

56/100

Risk levelMedium

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

Síť21 is a regional Internet Service Provider based in the Czech Republic, specializing in fiber optic internet services, IPTV, voice, and mobile offerings primarily targeting residential and business customers in the Zlínský kraj region. The company positions itself as a reliable and fast internet provider with a focus on modern connectivity solutions. The website reflects a professional digital presence built on WordPress with strong SEO and marketing integrations, including Google Analytics and Facebook Pixel, ensuring effective customer engagement and tracking. Privacy compliance is well addressed with a comprehensive cookie consent mechanism adhering to GDPR standards. Security posture is solid with HTTPS enforced and use of Google reCAPTCHA, though formal security policies and incident response contacts are not published. Overall, the site is accessible, well-structured, and trustworthy, supporting the company's market credibility.

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

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 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

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, YouTube, Google APIs

      What to do: Document all third-party data sharing in your privacy policy

  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 sit21.cz

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

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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
95
Security headers
35
Email security
70
DNS health
75
Network security
20
GDPR outside view
40
Average
56

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 operates in the telecommunications sector with a small-sized business model focused on regional market penetration. It leverages a direct-to-customer approach offering internet and related services with clear pricing and package options. The presence of social media channels and marketing tools indicates active customer engagement and brand building. The domain age and WHOIS data support legitimacy and consistent business operations since 2016. The lack of published certifications or formal security policies suggests room for maturity in compliance and governance. The business benefits from a modern CMS platform enabling agile content management and customer interaction.

Security posture

Síť21 demonstrates a moderate to good security posture with HTTPS enforced and integration of Google reCAPTCHA to mitigate spam and bot attacks. The cookie consent banner is comprehensive, providing granular control to users, which aligns with GDPR compliance. However, the absence of a dedicated security policy page, incident response contacts, and vulnerability disclosure mechanisms indicates gaps in transparency and readiness. No critical vulnerabilities or exposed sensitive data were detected in the analyzed content. Security headers were not explicitly confirmed but should be verified. Overall, the security maturity is adequate for a small ISP but could be enhanced with formal documentation and proactive disclosure.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and commitments.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publish a vulnerability disclosure or security.txt file to encourage responsible reporting.
  4. Regularly audit and update third-party scripts and plugins to mitigate potential vulnerabilities.
  5. Enhance website accessibility features to improve compliance and user experience.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Síť21
Description
Spolehlivý a opravdu rychlý internet, který nekolísá. Optické připojení k internetu ve Zlíně, Otrokovicích a blízkém okolí. Připojím tě do sítě 21. století!
Key services
Fiber optic internet, IPTV, Voice services, Mobile services
Content quality
good
Branding
consistent

Technology

Stack
WordPress, WooCommerce, Elementor, Yoast SEO, Slider Revolution, Google Tag Manager, Google Analytics, Facebook Pixel, Seznam.cz tracking, CookieYes consent management
Frameworks
WordPress, Redux
Platforms
WordPress CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • Use of Google reCAPTCHA
  • Cookie consent banner with granular controls
  • No exposed sensitive data in HTML
  • Use of latest WordPress and plugins versions (implied)

Analytics and tracking

Services
Google Analytics, Facebook Pixel, AddThis
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Facebook Ads, Google Ads
Tracking pixels
Facebook Pixel, Seznam.cz tracking
Marketing tools
CookieYes
Transparency
good

Site quality

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

Key observations

  1. Website is a regional ISP focused on Zlínský kraj in Czech Republic
  2. Uses modern WordPress CMS with popular plugins and SEO tools
  3. Complies with GDPR cookie consent requirements with detailed cookie categories
  4. Contact information is clearly provided with emails and phone numbers
  5. No explicit security policy or incident response info published
  6. No WAF or blocking detected, site fully accessible
  7. No adult or questionable content detected
  8. Good use of analytics and marketing tools with transparency
  9. Domain WHOIS data consistent and domain age appropriate
Technical notes

Notes

The website is built on WordPress CMS using popular plugins such as WooCommerce, Elementor, Yoast SEO, and Slider Revolution, indicating a modern and flexible technical infrastructure. The use of Google Tag Manager, Analytics, and Facebook Pixel shows advanced marketing and analytics integration. Performance is moderate with some optimization potential. Mobile responsiveness is good, and SEO practices are well implemented with meta tags and structured data. Hosting provider details are limited but domain registrar is REG-ACTIVE24, a known Czech registrar. No WAF or blocking mechanisms were detected, allowing full content access. Technical risks are minimal but continuous monitoring of plugin updates and security patches is advised.
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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