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I have an unknown device in my network that behaves weirdly and I'd appreciate some help on this topic.

Under my Windows machine I am able to ping the hostname lmachine.0 and get the corresponding IP address (192.168.18.64). When I try to do an nslookup on this hostname from the Windows machine I get the error Non-existent domain.

With my Linux and OS X machine I cannot ping nor resolve the hostname lmachine.0. Pinging from those machines using the IP address (192.168.18.64) is working fine.

Here is the output of an sudo nmap 192.168.18.64 scan:

Starting Nmap 6.47 ( http://nmap.org ) at 2015-11-26 11:22 CET
Nmap scan report for 192.168.18.64
Host is up (0.00042s latency).
Not shown: 999 closed ports
PORT     STATE SERVICE
1001/tcp open  unknown
MAC Address: 1E:30:6C:A2:45:5E (Unknown)

Nmap done: 1 IP address (1 host up) scanned in 11.43 seconds

I'm now wondering what kind of hostname this lmachine.0 is, since only Windows seems to be able to resolve it? And how can I resolve it on a UNIX OS?

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  • You're not mentioning whether you have a DNS server in your network or not. I'd assume that you don't. Also, you don't mention whether you can ping the machine from Linux and OS X using its IP address. I presume you don. In this case, it's nothing but an unfortunarte entry in the Windows machine's host file. Which, of course, you could replicate manually to the Linux and OS X machines.
    – Run CMD
    Commented Nov 26, 2015 at 10:46
  • @ClassStacker Thank you for your input. I can (!) ping the machine using the IP address from Linux and OS X. The hosts file is empty on the Windows machine. Any other ideas?
    – dislick
    Commented Nov 26, 2015 at 10:50
  • ...are you seriously using .0 as a DNS domain? o.0 Commented Nov 26, 2015 at 10:54

1 Answer 1

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MS Windows uses a variety of naming services. DNS is only one of them.

One is NetBIOS Naming Services - Some computers regularly broadcast their name and address and other computers on the same LAN will be able to receive and keep track of these names.

There are a variety of such protocols - Windows PCs and things that coexist with them are irritatingly chatty on a LAN:

enter image description here

Note the "Host Announcement" with "Periodicity" = 12 minutes.

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