Is er.cz Safe? Security Analysis for Tomáš Martínek
https://er.czCheck if er.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
ER.cz is a small Czech-based service providing free third-level domain redirection under the er.cz domain. The service targets Czech internet users who want to simplify or mask their website URLs by offering free domain aliases, email aliases, and visitor statistics. The business appears to be operated by Tomáš Martínek since at least 2004, positioning itself as a niche provider in the Czech internet domain redirection market. The website content is primarily in Czech and offers basic navigation and support features including a discussion forum and FAQ. Technically, the site uses standard HTML, CSS, and JavaScript with Matomo analytics for visitor tracking, but lacks modern security features such as HTTPS enforcement and security headers. The absence of WHOIS data is typical for .cz domains but limits independent verification of domain ownership and age. Contact information is limited to an email address and a contact page, with no phone numbers or social media presence. Overall, the site serves a specialized function with modest technical sophistication and limited security and privacy compliance.
Detected Technologies
13 urgent findings need attention
1 critical · 12 high
- + 5 more findings in the full report below
Keep er.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
8 findings
15/100
GDPR Compliance
4 findings
25/100
NIS2 Compliance
8 findings
17/100
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 business operates in the technology sector, specifically in domain redirection and internet services. Its competitive advantage lies in offering free domain redirection with additional features like email aliases and statistics, which are uncommon to be provided free of charge. The business model relies on free service offerings possibly monetized through advertising partnerships, as evidenced by ad placements from wedosas.net and toplist.cz. The target customers are Czech internet users needing simple domain redirection solutions. The company maintains partnerships with Czech internet marketing and catalog sites, enhancing its ecosystem. Growth indicators are limited but the long operational history since 2004 suggests stable niche presence. The lack of modern web design and security features may limit broader market appeal.
Security Posture Analysis
Comprehensive Security Assessment
The security posture of ER.cz is basic and requires significant improvement. The website does not enforce HTTPS, lacks security headers, and does not publish privacy or cookie policies, which are critical for GDPR compliance and user trust. The login form uses POST but lacks visible advanced protections such as CSRF tokens or multi-factor authentication. No incident response or vulnerability disclosure policies are published. While no explicit vulnerabilities or malware were detected in the HTML content, the absence of modern security best practices exposes the site to potential risks. The use of Matomo analytics with disabled cookies is a positive privacy consideration but insufficient to offset other security gaps. Overall, the site scores low on security maturity and should prioritize implementing HTTPS, security headers, and privacy compliance measures.
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
Tomáš Martínek
Nejkvalitnější přesměrování pro Váš web, které můžete získat zdarma! Kromě samotného přesměrování 3. řádu (dvoupísmené domény er.cz), vám nabízíme také e-mailový alias, statistiky, velké možnosti nastavení, rozsáhlou nápovědu, soutěže a další věci, které Vám zdarma nikdo jiný nenabídne!
basic
moderate
Technical Stack
moderate
poor
basic
basic
Security Assessment
- No exposed sensitive data in HTML
- Login form uses POST method
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website provides free third-level domain redirection service for Czech users.
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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
Sensitive data may be cached
LOWCache-Control header should include "no-store" for sensitive pages
👤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
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 DKIM record found
MEDIUMDKIM adds cryptographic signatures to emails
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
🏆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 Soon
HIGHSSL certificate expires in 19 days
Mixed Content Detected
MEDIUM21 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
Good Network Security Posture
LOWNo unnecessary services detected on common risky ports
How does er.cz compare?
See how er.cz stacks up against similar websites in the same industry.
🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Technical Analysis
Comprehensive security assessment findings
Additional Findings
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Marketing Intelligence
Contact emails, phone numbers & warm leads
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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