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Server Port Scanner
Scan common server network ports client-side to test connection status.
✓ Free✓ No signup✓ Privacy first✓ Runs in your browser
How it works
Scan ports in three steps
1. Enter host server
Type the destination host domain name or IP address you want to scan.
2. Select port range
Choose the target port numbers (such as port 80, 443, 21, or 22).
3. Inspect statuses
View the real-time results table indicating whether ports are open, closed, or filtered.
FAQ
Common questions
A network port scan queries a host system’s communication channels to determine which services are listening or if firewall rules are blocking external access.
The tool checks common server application ports, including FTP (21), SSH (22), Telnet (23), SMTP (25), DNS (53), HTTP (80), POP3 (110), IMAP (143), and HTTPS (443).
An open port indicates a service is active and responding. A filtered port indicates a security firewall is blocking connection requests.
Yes, the tool runs standard connection checks directly from your browser to verify configuration setups without triggering high-risk diagnostic signatures.
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About the Server Port Scanner
Opening unauthorized network ports exposes servers to significant security vulnerabilities. This diagnostic scanner helps developers and system administrators check active connection statuses, verify firewall rules, and audit open services in real time.
Benefits
- Audit firewall policies — Confirm that private server ports are blocked from external access.
- Troubleshoot local configurations — Verify if web, mail, or FTP services are running.
- Prevent connection blocks — Spot if internet providers are filtering standard ports.
- Improve system security — Identify unauthorized listening services to reduce risk.
Privacy
Port checks run directly in the active browser session and no target data is saved.