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Security report for ceskyinternet.cz

ČESKÝ INTERNET s.r.o. · Real Estate · Czech Republic

Partial score · DNS & email only

56/100

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

ČESKÝ INTERNET s.r.o. is a well-established Czech company specializing in operating high-traffic internet portals focused on real estate, construction, housing, and accommodation services. With a market presence dating back to 1999, the company serves millions of unique visitors monthly through its flagship portals such as ČESKÉREALITY.cz and ČESKÉSTAVBY.cz. Their business model centers on providing targeted advertising and marketing services to clients in the real estate and housing sectors, leveraging their extensive audience reach. Technically, the website employs a modern technology stack including jQuery, Bootstrap, Google Analytics, and GDPR-compliant consent management tools. The site is mobile-optimized, SEO-friendly, and integrates social media and advertising platforms effectively. Performance is moderate with good user experience and navigation clarity. From a security perspective, the site enforces HTTPS and uses consent management for GDPR compliance. However, it lacks explicit security headers and publicly available security policies or incident response contacts. The absence of WHOIS data due to privacy protection slightly reduces transparency but does not detract significantly from the site's legitimacy given the professional presentation and valid contact information. Overall, the website demonstrates a strong business credibility and digital maturity with room for improvement in security transparency and WHOIS data availability. Strategic recommendations include enhancing security headers, publishing security policies, and improving WHOIS transparency to bolster trust and compliance.

Scanned

This is an earlier scan of ceskyinternet.cz. View the latest report

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
Checks completed
6of 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

5 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

      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

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, LinkedIn

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

  2. 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.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

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

Keep watching ceskyinternet.cz

This scan found 13 issues across 5 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
0
Email security
75
DNS health
80
Network security
100
GDPR outside view
25
Average
56

Not counted

  • Security headers: did not complete in this scan.
  • 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 holds a strong market position as one of the largest providers of internet content in the Czech Republic related to real estate and housing. Its competitive advantage lies in its extensive network of specialized portals attracting millions of visitors monthly, enabling targeted advertising opportunities. Revenue streams primarily derive from advertising sales and marketing services tailored to real estate, construction, and accommodation sectors. The target customer segments include real estate agencies, construction companies, accommodation providers, and end consumers seeking property or housing information. The company benefits from a stable growth trajectory supported by long-term client relationships and a diversified portfolio of web properties. Partnerships with related portals and integration with major advertising and analytics platforms further strengthen its ecosystem.

Security posture

The website exhibits a moderate to strong security posture with mandatory HTTPS encryption and GDPR-compliant consent mechanisms in place. The use of AppConsent for managing user consent and integration with Google Analytics and Facebook SDK is handled responsibly. However, the absence of key security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security represents an area for improvement. No vulnerabilities or exposed sensitive data were detected in the HTML content. The lack of a published security policy or incident response contact limits transparency and preparedness for security incidents. Overall, the security maturity is adequate for the business type but could be enhanced by adopting additional best practices and formalizing incident response procedures.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to harden the website against common attacks.
  2. Publish a clear security policy and provide dedicated incident response contact information to improve transparency and trust.
  3. Consider creating and publishing a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.
  4. Enhance WHOIS transparency by ensuring domain registration details are publicly available or provide business verification information on the website.
  5. Regularly review and update third-party scripts and libraries to mitigate risks from vulnerable components.

Contact details published on the site

Addresses
Legal name
ČESKÝ INTERNET s.r.o.
VAT number
CZ26113571
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
ČESKÝ INTERNET s.r.o.
Description
Český Internet s.r.o. patří k největším poskytovatelům internetového obsahu v České republice. Na stavebním a realitním serveru ČESKÉSTAVBY.cz a ČESKÉREALITY.cz hledá informace každý měsíc přes milion návštěvníků.
Key services
Provoz realitních serverů (ČESKÉREALITY.cz, RealitníServery.cz), Provoz stavebního a bytového portálu (ČESKÉSTAVBY.cz), Provoz ubytovacích serverů (ČESKÉUBYTOVÁNÍ.cz, HotelyPenziony.cz), Reklamní služby a marketing na internetu
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Bootstrap, Google Analytics, Google Tag Manager, AppConsent (GDPR consent management), Facebook SDK
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • GDPR consent management implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Adsense
Tracking pixels
Facebook Pixel (via Facebook SDK)
Marketing tools
AppConsent GDPR Consent
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and navigation.
  2. Strong focus on Czech real estate and related services.
  3. Comprehensive privacy and cookie policies with GDPR compliance.
  4. Use of modern analytics and consent management tools.
  5. No security policy or incident response information publicly available.
  6. WHOIS data is unavailable, possibly due to privacy protection.
  7. No adult or questionable content detected.
  8. Good branding consistency and professional presentation.
Technical notes

Notes

The website is built using a combination of jQuery, Bootstrap CSS framework, and integrates Google Analytics and Google Tag Manager for tracking and marketing purposes. It uses AppConsent for GDPR consent management and Facebook SDK for social media integration. The site is mobile responsive with good SEO meta tags and structured data in JSON-LD format describing the business entity. Performance is moderate, with some legacy scripts like jquery-migrate present, indicating potential for modernization. Accessibility is basic but functional. Hosting provider details are not explicitly disclosed. Overall, the technical infrastructure supports the business needs effectively 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

Earlier scans of this domain

  1. 56/100Medium22 findings · partial scanView report
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