Is sit21.cz Safe? Security Analysis for Síť21
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GDPR-aligned
Data handling
EU
Hosting region
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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.
Detected Technologies
11 urgent findings need attention
1 critical · 10 high
- + 3 more findings in the full report below
Keep sit21.cz under constant watch
Guard tracks your live infrastructure daily: certificate expiry, DNS & mail authentication drift, uptime changes, subdomain inventory, and unexpected tracker or content shifts. A full timeline captures every diff so you can prove remediation and spot regressions instantly.
Security drift alerts
Risk score drops, new high-severity issues, and header hardening gaps
Compliance watch
GDPR / NIS2 posture changes with governance evidence snapshots
Infrastructure surface
Unexpected open services, SSL expiry, DNS & email authentication changes
Content & tracker intelligence
Marketing tech shifts, analytics drift, and AI recommendation updates
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Security Headers
6 findings
35/100
GDPR Compliance
3 findings
40/100
NIS2 Compliance
9 findings
2/100
Email Security
4 findings
70/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
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 Analysis
Comprehensive Security Assessment
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.
Strategic Recommendations
Priority Actions for Security Improvement
Publish a dedicated security policy page outlining security practices and commitments.
✨Observations
Comprehensive website and business-context analysis.
AI-Enhanced Website Analysis
Business Insights
Síť21
Spolehlivý a opravdu rychlý internet, který nekolísá. Optické připojení k internetu ve Zlíně, Otrokovicích a blízkém okolí. Připojím tě do sítě 21. století!
good
consistent
Technical Stack
moderate
good
basic
good
Security Assessment
- 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 & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is a regional ISP focused on Zlínský kraj in Czech Republic
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing X-Frame-Options header
Prevents clickjacking attacks
Missing X-Content-Type-Options header
Prevents MIME type sniffing
Missing Content-Security-Policy header
Controls resources the browser is allowed to load
Missing X-XSS-Protection header
Legacy XSS protection (deprecated but still recommended)
Missing Referrer-Policy header
Controls referrer information sent with requests
Missing Permissions-Policy header
Controls browser features and APIs
👤GDPR Compliance
Privacy and data protection assessment under GDPR regulations.
GDPR Compliance
Privacy and data protection assessment
No Privacy Policy found
GDPR requires a clear and accessible privacy policy
EU business without adequate privacy measures
EU businesses are subject to strict GDPR requirements
Third-party services without privacy policy
Detected services: Google Analytics, Facebook, YouTube, Google APIs
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
NIS2 requires documented cybersecurity and information security measures
No vulnerability disclosure policy
NIS2 encourages coordinated vulnerability disclosure
No security policy documentation found
NIS2 requires documented cybersecurity governance and risk management
No incident response procedures found
NIS2 requires documented incident response and business continuity plans
No business continuity planning found
NIS2 emphasizes operational resilience and business continuity
No security contact information
NIS2 requires clear incident reporting channels
No vulnerability reporting mechanism
Clear vulnerability reporting supports coordinated disclosure
No NIS2 reference found
Consider explicitly mentioning NIS2 compliance efforts
Critical sector without clear security compliance
Detected sectors: energy, transport, digital
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📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
No DKIM record found
DKIM adds cryptographic signatures to emails
No BIMI Record
BIMI displays brand logos in email clients
No MTA-STS Policy
MTA-STS enforces TLS for email delivery
No TLS-RPT Record
TLS-RPT provides reporting for email TLS issues
SPF Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
SSL Certificate Expires Within 90 Days
SSL certificate expires in 71 days
Partial SSL/TLS Assessment
Completed 2 of 4 security checks due to time constraints
Certificate Details
OCSP Status
📊DNS Health
DNS configuration and security assessment.
DNS Health
DNS configuration and security assessment
DNSSEC Not Enabled
DNSSEC is not configured for this domain
CAA Records Not Configured
Certificate Authority Authorization (CAA) records not found
No DMARC Record
DMARC policy not configured
Domain Registration Details
DNS Records
DNSSEC Status
DNS Performance
SPF Analysis
⚡Network Security
Port scanning and network exposure analysis.
Network Security
Port scanning and network exposure analysis
High-Risk Service Exposed: FTP
Port 21 (FTP) is publicly accessible - FTP - Often unencrypted file transfer
How does sit21.cz compare?
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🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Technical Analysis
Comprehensive security assessment findings
Additional Findings
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