139
TCP
NETBIOS-SSN
NetBIOS Session Service
🔓 Security: InsecureStatus: Deprecated📁 Category: File Transfer
📋 Basic Information
- Port Number
- 139
- Protocol
- TCP
- Service
- NETBIOS-SSN
- Popularity
- Medium
🔒 Security Information
⚠️
Security Notes
Use only on internal networks, block external access
🔗 Related Ports
137
NETBIOS-NS
NetBIOS Name Service
UDP
NetBIOS Name Service for Windows network name resolution
🔓 Security: Insecure⚙️ Category: Other⚠️ deprecated
138
NETBIOS-DGM
NetBIOS Datagram Service
UDP
NetBIOS Datagram Service for broadcast messaging
🔓 Security: Insecure⚙️ Category: Other⚠️ deprecated
445🔥
SMB
Server Message Block
TCP
Server Message Block over TCP/IP for Windows file and printer sharing
⚠️ Security: Depends📁 Category: File Transfer