← Port Encyclopedia
445
SMB
TCP
Windows
Critical Risk
Server Message Block — Windows file sharing, EternalBlue, WannaCry, PrintNightmare
🔍 How to Scan Port 445
nmap -sV -p 445 target
nmap -sV -sC --script=banner -p 445 target
nc -zv target 445
🛡️ Security Considerations
- Scan port 445 with
nmap -sVto identify the exact service and version - If SMB is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit smbto find known exploits - Monitor traffic on port 445 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation