Internet TCP port 137 is primarily used by NetBIOS, a network protocol used by Windows operating systems for communication between network devices. It is specifically used for NetBIOS Name Service, which allows computers to find each other on a local network by name. Examples of software that use this port include Windows file and print sharing services, as well as the SMB (Server Message Block) protocol for shared access to files, printers, and serial ports.
TCP port 137 is associated with NetBIOS Name Service, which is a network protocol used in Windows systems. In the past, hackers have exploited this port to perform a NetBIOS attack. They would send a specially crafted packet to port 137, which could cause the system to disclose information such as the domain, username, and computer name. This information could then be used for further attacks. Additionally, hackers could also exploit this port to execute a Denial of Service (DoS) attack, causing the system to become unresponsive. Therefore, it is recommended to block this port if NetBIOS service is not required.
