Free Public Network Security Scan
Run a non-intrusive network security scan against your public domain to find potential network security vulnerabilities.
Includes checks for:
- Open ports
- Subdomain takeover
- DNS security
"Barrion's security scanning has helped us implement best security practices efficiently, saving us countless hours."
Sarah Chen
Head of Security
"We identified and fixed critical vulnerabilities before our platform launch, saving us from potential data breaches."
Marcus Anderson
CTO
"Barrion gives us peace of mind, knowing we're notified of any security issues. Exactly what our team needed."
Oskar Nilsson
Tech Lead
Scan in three simple steps
Fast, safe, non-intrusive checks with actionable results.
Start scan
Enter your URL, and click the start scan button to begin.
Scan runs
Barrion performs passive, read-only security checks with minimal site impact.
Take Action
Fix issues with step-by-step guidance and enable monitoring for continuous protection.
What this scan checks
- Open ports exposure on common services
- Subdomain takeover risk patterns
- DNS security posture (DNSSEC/CAA/wildcards)
Why network exposure matters
Unnecessary open services and stale DNS records expand your attack surface. Tightening exposure at the edge and cleaning up DNS reduce both opportunistic and targeted attack paths.
How to reduce exposure
- Close unused ports at the firewall or load balancer
- Restrict admin panels by IP/VPN and enforce MFA
- Remove orphaned CNAMEs, and add CAA restricting certificate issuance
Tool-specific questions
Is the scan intrusive?
Why are open ports risky?
What is subdomain takeover?
Do I need DNSSEC and CAA?
Why Choose Barrion?
Real-Time Results
Instant security analysis with detailed reports, giving you an immediate security overview
Comprehensive Checks
Multiple best-practice security checks in a single scan, for broad coverage
Actionable and Effective
Clear recommendations for fixes, helping you improve your security quickly and effectively
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