Internet UDP port 137 is primarily used by NetBIOS, a network protocol used in Windows-based systems for communication between devices on a local area network (LAN). Specifically, it is used for NetBIOS Name Service which is responsible for name registration and resolution. Examples of software that use this port include Microsoft's Windows Internet Name Service (WINS) and the Samba suite for Unix and Linux systems.
UDP port 137 is associated with NetBIOS Name Service, which is used in Windows networks for name resolution. In the past, hackers have exploited this port to perform a NetBIOS Name Service attack, where they send a spoofed UDP packet to port 137, tricking the system into revealing sensitive information such as the domain name, user name, and IP address. Additionally, hackers have used this port to conduct Distributed Denial of Service (DDoS) attacks by flooding it with traffic, causing the system to become overwhelmed and unresponsive. Furthermore, port 137 can be exploited to spread malware if it is left open and unprotected. Therefore, it is crucial to secure this port to prevent potential cyber attacks.
