Skip to main content

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 operating since 1999, specializing in providing internet content and advertising services primarily in the real estate, construction, and accommodation sectors. The company operates several high-traffic portals such as ČESKÉSTAVBY.cz, ČESKÉREALITY.cz, and ČESKÉUBYTOVÁNÍ.cz, attracting over a million monthly visitors. Their business model focuses on connecting users seeking real estate and housing information with advertisers and service providers, leveraging their extensive network and targeted marketing solutions. Technically, the website employs a modern technology stack including jQuery, Bootstrap, Google Analytics, Google Tag Manager, and Facebook SDK, complemented by a GDPR-compliant consent management system (AppConsent TCF2). The site is mobile-optimized with good SEO practices and structured data enhancing search visibility. Performance is moderate with room for improvement in accessibility and security headers. From a security perspective, the site enforces HTTPS and integrates GDPR consent mechanisms, but lacks visible security headers such as CSP or HSTS, which could enhance protection against common web threats. No forms or sensitive data exposure were detected, and no vulnerabilities were apparent in the provided content. However, the absence of WHOIS registration data reduces domain trustworthiness and should be investigated. Overall, the website presents a professional and trustworthy front with comprehensive business information and privacy compliance. Strategic improvements in security headers and domain registration transparency would further strengthen their security posture and business credibility.

Scanned

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.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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 in the Czech Republic's real estate and internet advertising sectors, leveraging multiple branded portals to capture diverse user segments interested in property, construction, and accommodation. Their competitive advantage lies in their long-standing presence since 1999, extensive visitor base, and targeted advertising solutions. Revenue streams likely include advertising sales, premium listings, and marketing services. The company maintains a professional partnership ecosystem with related domains and social media presence, supporting growth and brand recognition. Observations suggest a stable medium-sized enterprise with consistent branding and a focus on customer satisfaction.

Security posture

The current security maturity level is moderate. The website uses HTTPS and GDPR-compliant consent management, indicating awareness of privacy and security requirements. However, the lack of explicit security headers such as Content Security Policy, HSTS, and X-Frame-Options represents a gap that could expose the site to certain web-based attacks. No incident response or security policy information is publicly available, which may impact readiness for security events. The absence of WHOIS data is a concern for domain legitimacy and trust. Overall, the security posture is adequate for business operations but would benefit from enhancements in security controls and transparency.

Recommendations

  1. Implement comprehensive HTTP security headers including CSP, HSTS, X-Frame-Options, and X-XSS-Protection to mitigate common web vulnerabilities.
  2. Investigate and resolve the missing WHOIS registration data to improve domain trust and legitimacy.
  3. Publish a dedicated security policy and incident response contact information to enhance transparency and preparedness.
  4. Regularly audit and update third-party scripts and libraries to prevent vulnerabilities.
  5. Enhance accessibility features to improve user experience for all visitors, including those with disabilities.

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
ČESKÉSTAVBY.cz, ČESKÉREALITY.cz, ČESKÉUBYTOVÁNÍ.cz, RealitníServery.cz, reklamní služby na internetu
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Bootstrap, Google Analytics, Google Tag Manager, Facebook SDK, AppConsent TCF2, Camera.js slider
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • GDPR consent management via AppConsent
  • 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 TCF2
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 structured data
  2. Strong presence of privacy and cookie policies with consent management
  3. No WHOIS data available, which is unusual and reduces domain trust
  4. Good use of modern web technologies and analytics tools
  5. No visible security headers detected in provided data
  6. No forms detected in the HTML content provided
  7. Clear contact information with physical address, phone, and email
  8. Social media presence on Facebook and LinkedIn
  9. No adult or questionable content detected
Technical notes

Notes

The website is built on a traditional web stack using jQuery and Bootstrap for UI components, with additional libraries for sliders and form handling. It integrates Google Analytics and Tag Manager for tracking and marketing purposes, alongside Facebook SDK for social media engagement. The site uses AppConsent for GDPR compliance, indicating a mature approach to privacy. Performance is moderate, with potential improvements in loading speed and accessibility. No CMS was explicitly detected, suggesting a custom or static site architecture. Hosting details are not disclosed. The technical implementation is solid but could benefit from modernization and enhanced security practices.
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
Reviews of this site

Share your experience with ceskyinternet.cz. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review ceskyinternet.cz.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.