// REFERENCE
Port 445 (SMB)
Protocol: TCP
Service: SMB
High risk
SMB: Windows file and printer sharing (direct, no NetBIOS). One of the most dangerous ports to expose: EternalBlue/WannaCry, ransomware and lateral movement. Block it at the perimeter.
Related tools
Work with this in:
Related
20
Port 20 (FTP-DATA) 21
Port 21 (FTP) 69
Port 69 (TFTP) 139
Port 139 (NetBIOS Session / SMB) 873
Port 873 (rsync) 989
Port 989 (FTPS data)
Port 20 (FTP-DATA) 21
Port 21 (FTP) 69
Port 69 (TFTP) 139
Port 139 (NetBIOS Session / SMB) 873
Port 873 (rsync) 989
Port 989 (FTPS data)
Assignments per the IANA port registry. Educational content.