Port 139

NetBIOS Session (TCP), Windows File and Printer Sharing


 * This is the single most dangerous port on the Internet. All "File and Printer Sharing" on a Windows machine runs over this port. About 10% of all users on the Internet leave their hard disks exposed on this port. This is the first port hackers want to connect to, and the port that firewalls block.


 * advICE: Microsoft Ports