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I am having some difficulties when I am trying to get the NetBIOS Name of a machine by it's IP Address with the command (On Windows) nbtstat -A 192.168.1.1, In this example I am trying to get the name of the Router.

My problem is that it doesn't work... :) So... I was curious enough to open Wireshark and see the traffic, and what I found out is - When My comuter is sending the NBNS Query, the target machine response with an ICMP Destination Unreachable (Port Unreachable) Packet.

Wireshark capture of NBNS query process on my computer

My questions are:

  • Why does it happen?
  • How can I fix it?

Keep in mind that I've tried the solution from here - https://www.microchip.com/forums/m374876.aspx, but it doesn't work for me...

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The router doesn't implement NetBIOS and therefore has no process listening on port 137.

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