What is NetBIOS DDoS


Vulnerable computer systems and applications:

Routers, computers.


The NetBIOS protocol allows network devices to communicate and exchange data among themselves. NetBIOS can be used to execute various attacks on the Internet (DDoS) or other criminal activities.


  • Limit NetBIOS services availability from the Internet. The router or computer firewall must be set so that UDP protocol ports 137, 138, and TCP protocol port 139 are inaccessible from the outside;
  • Disable the NetBIOS service on routers if you are not using it.