NetBIOS over TCP/IP (NBT, or sometimes NetBT) is a networking protocol that allows legacy computer applications relying on the NetBIOS API to be used on modern TCP/IP networks. NetBIOS was developed in the early 1980s, targeting very small networks (about a dozen computers). Sorry this is not the case. The DNS is set up propperly on both interfaces to 127.0.0.1 / ::1 on IPv6 (since this is the only AD Server - not sure if a secondary is even possible with Windows Server 2016 Essentials). Also the NetBIOS settings were kept exactly the same on both interfaces. File smb-os-discovery. Script types: hostrule Categories: default, discovery, safe Download: https://svn.nmap.org/nmap/scripts/smb-os-discovery.nse User Summary ... Further, this problem turns out to be an occasional outcome from the default setting for NetBIOS over TCP/IP in the Win10 environment, which takes its cue by default from the local DHCP server.