Is duelonline.cz Safe? Security Analysis for Ace IT s.r.o.
https://duelonline.czCheck if duelonline.cz is a scam or legitimate. Free security scan and reviews.
Below Technology avg (72)
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SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
AI Summary
DuelOnline.cz is a Czech Republic-based online accounting portal focused on providing cloud-based access to the DUEL economic system. The website targets accounting professionals, businesses, and accounting firms seeking secure, remote, and integrated accounting solutions. The business model revolves around SaaS delivery of accounting, payroll, inventory, and retail sales management services. The company Ace IT s.r.o. appears as the parent entity, with partnerships with major technology providers such as HP, Dell, Cisco, Microsoft, and Debian, enhancing its market credibility. Technically, the website employs a traditional web stack with jQuery 1.6.1, jQuery UI, and Google Analytics for tracking. It integrates virtualization technologies and cloud infrastructure based on Microsoft and Linux platforms. However, the site shows signs of aging technology and lacks modern security headers and HTTPS confirmation, which impacts its security posture. Mobile optimization and accessibility are basic, and no CMS or hosting provider details are evident. From a security perspective, the site demonstrates some best practices like data backup and physical server security but lacks visible HTTPS enforcement, security headers, and formal privacy or cookie policies. The absence of WHOIS data reduces domain trustworthiness and raises concerns about domain registration legitimacy. No vulnerability disclosures or incident response contacts are provided, limiting transparency. Overall, DuelOnline.cz is a functional and professional business site with moderate technical maturity and security posture. Strategic improvements in security, privacy compliance, and technology modernization are recommended to enhance trust and resilience.
Detected Technologies
14 urgent findings need attention
1 critical · 13 high
- + 6 more findings in the full report below
Keep duelonline.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
7 findings
20/100
GDPR Compliance
5 findings
10/100
NIS2 Compliance
8 findings
17/100
Email Security
3 findings
85/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
DuelOnline.cz occupies a niche in the Czech accounting software market, leveraging cloud and virtualization technologies to offer remote access to the DUEL economic system. Its competitive advantage lies in combining accounting expertise with IT infrastructure know-how, supported by partnerships with leading hardware and software vendors. The business model is subscription-based SaaS targeting SMEs and accounting firms needing secure, centralized data access without investing in physical servers. The presence of testimonials and partner logos supports credibility. However, the lack of transparent privacy and security policies and missing WHOIS data may hinder trust among privacy-conscious customers. Growth potential exists through enhanced compliance and modernization.
Security Posture Analysis
Comprehensive Security Assessment
The website's security maturity is moderate but incomplete. While it mentions physical and software security measures and backup systems, the absence of HTTPS confirmation and security headers is a significant gap. The use of an outdated jQuery version introduces potential vulnerabilities. No formal privacy, cookie, or incident response policies are published, which is a compliance risk under GDPR and related regulations. The missing WHOIS data further reduces trust in domain legitimacy. Overall, the site needs to implement modern security best practices, including HTTPS, CSP, HSTS, and publish clear privacy and incident response information to improve its security posture and compliance.
Strategic Recommendations
Priority Actions for Security Improvement
Implement HTTPS with a valid SSL/TLS certificate and enforce secure connections site-wide.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
Ace IT s.r.o.
Moderní účetnictví online. Ekonomický systém DUEL Účetnictví, Daňová evidence, Mzdy, Sklady, Malobchodní prodej, Majetek, Kancelář, E-Shop
good
consistent
Technical Stack
moderate
basic
basic
good
Security Assessment
- Use of virtualization and mirroring
- Soft and physical server security
- Backup and data recovery system
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is accessible and not blocked by WAF or security mechanisms.
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing Strict-Transport-Security header
HIGHForces HTTPS connections
Missing X-Frame-Options header
HIGHPrevents clickjacking attacks
Missing X-Content-Type-Options header
MEDIUMPrevents MIME type sniffing
Missing Content-Security-Policy header
HIGHControls resources the browser is allowed to load
Missing X-XSS-Protection header
MEDIUMLegacy XSS protection (deprecated but still recommended)
Missing Referrer-Policy header
LOWControls referrer information sent with requests
Missing Permissions-Policy header
MEDIUMControls 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
HIGHGDPR requires a clear and accessible privacy policy
No Cookie Policy found
HIGHGDPR requires clear information about cookie usage
No Cookie Consent Banner found
HIGHGDPR requires explicit consent for non-essential cookies
EU business without adequate privacy measures
CRITICALEU businesses are subject to strict GDPR requirements
Third-party services without privacy policy
HIGHDetected services: Google Analytics
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
HIGHNIS2 requires documented cybersecurity and information security measures
No vulnerability disclosure policy
MEDIUMNIS2 encourages coordinated vulnerability disclosure
No security policy documentation found
HIGHNIS2 requires documented cybersecurity governance and risk management
No incident response procedures found
HIGHNIS2 requires documented incident response and business continuity plans
No business continuity planning found
MEDIUMNIS2 emphasizes operational resilience and business continuity
No security contact information
HIGHNIS2 requires clear incident reporting channels
No vulnerability reporting mechanism
MEDIUMClear vulnerability reporting supports coordinated disclosure
No NIS2 reference found
LOWConsider explicitly mentioning NIS2 compliance efforts
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📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
No BIMI Record
LOWBIMI displays brand logos in email clients
No MTA-STS Policy
MEDIUMMTA-STS enforces TLS for email delivery
No TLS-RPT Record
LOWTLS-RPT provides reporting for email TLS issues
SPF Details
DKIM Selectors Found
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
Weak Protocols Supported
HIGHServer supports weak protocols: TLSv1.1
OCSP Stapling Not Enabled
LOWOCSP stapling improves performance and privacy
Certificate Transparency Not Implemented
LOWCertificate is not logged in Certificate Transparency logs
SSL Certificate Expires Within 90 Days
MEDIUMSSL certificate expires in 80 days
Mixed Content Detected
MEDIUM14 resources loaded over insecure HTTP
Partial SSL/TLS Assessment
LOWCompleted 3 of 4 security checks due to time constraints
Protocol Support
OCSP Status
📊DNS Health
DNS configuration and security assessment.
DNS Health
DNS configuration and security assessment
DNSSEC Not Enabled
MEDIUMDNSSEC is not configured for this domain
CAA Records Not Configured
LOWCertificate Authority Authorization (CAA) records not found
No DMARC Record
MEDIUMDMARC 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
HIGHPort 21 (FTP) is publicly accessible - FTP - Often unencrypted file transfer
How does duelonline.cz compare?
duelonline.cz scores below average. Browse similar domains to see how competitors handle security.
🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Technical Analysis
Comprehensive security assessment findings
Additional Findings
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Marketing Intelligence
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Plan Comparison
| Feature | PDF Report | Marketing+ |
|---|---|---|
| Full security analysis | ||
| Professional PDF export | ||
| Email delivery | ||
| Lifetime access + unlock code | ||
| Contact emails & phones | — | |
| Marketing outreach data | — |
Already purchased?
Order summary
Digital reports are delivered immediately after payment. By continuing you acknowledge the withdrawal waiver described in our Returns & Refunds policy.
Secure payments processed via EveryPay. Prices in EUR; Incl. 21% VAT.
SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
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