Browser Limitations
- This tool has limited capabilities due to browser security restrictions
- Only HTTP/HTTPS ports can be reliably checked
- Most ports will show as "filtered" rather than definitively open/closed
- For comprehensive port scanning, use dedicated tools like nmap
- Only scan systems you own or have permission to test
Port Scanner
Check if ports are open on a target host
Status Meanings
- Open: Port responded to connection attempt
- Closed: Port actively refused connection
- Filtered: No response or blocked by firewall
- Checking: Currently testing the port