Server Message Block. Windows file and printer sharing. Often targeted by malware — block from internet.
Test it now with our Port Scanner
| Port | 445 |
|---|---|
| Service | SMB |
| Protocol | TCP |
| Encrypted | No |
| Common Use | Server Message Block |
Online: Use our Port Scanner — enter your IP and port 445.
Command line:
nc -zv your-server-ip 445 (Mac/Linux)
Test-NetConnection -ComputerName your-server-ip -Port 445 (PowerShell)
Check locally:
ss -tlnp | grep :445 (Linux) netstat -an | findstr :445 (Windows)