Scan a preset group of common TCP ports on any host and see which are open.
Server-assisted public lookup
Ports in this preset
Scanning ports…
Host scanned
Total ports
| Port | Status | Service | Response |
|---|---|---|---|
The Port Scanner scans a range of common TCP ports on a target host and reports which are open, closed, or filtered. Rather than checking one port at a time, it gives you a rapid overview of all services exposed on a server - invaluable for network security audits, server hardening, and infrastructure troubleshooting.
Open ports on your server represent potential attack surfaces. Best practice is to close or firewall any port not actively needed. Most public-facing servers should only have ports 80 (HTTP), 443 (HTTPS), and optionally 22 (SSH on a non-standard port) open to the internet.
Enter a hostname or IP address and select which set of ports to scan - Top 20 common ports for a quick check, Top 100 for a thorough audit, or enter a custom range. Click Scan and results appear as each port is tested. Open ports are highlighted in green, filtered ports in amber, and closed ports shown as grey.