Tool Spotlight
Port Scanner - Check Open Ports and Network Services Online
Scan open ports on any host. Check common ports, custom ports, or port ranges to identify open network services and potential security vulnerabilities. Discover your public IP with our What is My IP tool or verify server reputation using Blacklist Checker.
Key Features
- Scan common and custom ports
- Port range scanning
- Service identification
- Security vulnerability detection
- Fast and accurate results
Use Cases
- Network security audit
- Firewall configuration testing
- Service availability check
- Security vulnerability assessment
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Port Scanner
Check open ports on any host. Scan common ports, custom ports, or port ranges to identify open services.
Scan a host to check open ports
Enter a domain or IP address above and select scan type to begin checking for open ports and services.
Onidel Cloud VPS
Performance-first cloud hosting for teams that need consistent benchmarks and transparent pricing.
- 99.99% uptime SLA
- Proven availability for critical workloads
- Plans from $4.95/month
- Predictable pricing and simple scaling
- AMD EPYC + NVMe stack
- Modern hardware with built-in DDoS protection
- 5 global regions
- Singapore, Sydney, Amsterdam, Ho Chi Minh City, more coming soon
Ideal for: demanding SaaS workloads, managed hosting agencies, and teams migrating off legacy VPS providers.
Launch faster with concierge onboarding
Start 14-day TrialLegal Disclaimer
Only scan ports you own or have explicit permission to scan. Unauthorized port scanning may be illegal in your jurisdiction. This tool is for legitimate security testing and network administration only.
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Frequently Asked Questions
What is port scanning and why is it useful?
Port scanning identifies which network ports are open on a server, revealing active services and potential security vulnerabilities. It's essential for network administrators and security professionals. Combine this with our What is My IP tool to identify your server's public IP and Blacklist Checker to verify your server's reputation.
Is port scanning legal?
Port scanning is legal only when performed on systems you own or have explicit permission to test. Unauthorized scanning may violate computer fraud laws in many jurisdictions. Always ensure you have proper authorization before scanning any network or server.
Which ports should I check for VPS security?
Common ports to monitor include SSH (22), HTTP (80), HTTPS (443), MySQL (3306), and PostgreSQL (5432). Ensure only necessary ports are open and protected with firewalls. When selecting VPS hosting, check our VPS benchmarks to compare security features and performance across providers.
How can I secure open ports on my VPS?
Use firewalls to restrict access to essential ports only, implement strong authentication, keep services updated, and regularly audit open ports. Consider using SSL certificates for encrypted connections. For reliable and secure VPS hosting, explore our VPS provider comparisons to find solutions with robust security features.
