nmblookup returns NULL mac Address from linux samba servers

Andrew Bartlett abartlet at samba.org
Mon Aug 28 19:06:07 UTC 2017

On Mon, 2017-08-28 at 13:13 -0500, Christopher R. Hertel via samba-
technical wrote:
> This has always been the case, and it has nothing to do with the subnet of
> the target machine.
> The response to the status request message is generated by the responding
> node, which has to retrieve the MAC address from the underlying hardware.
> There is no standard way to do this across all of the system types on which
> Samba runs (or, at least, that was the case when I first looked into this 18
> years ago), so Samba just fills the value with zeros.
> Again, this has nothing to do with the subnet on which the node is running.
> It has everything to do with whether or not it is easy to retrieve the data
> locally.

And either way, given the change in security posture in the 18 years
since, I don't think we should fill it in, even if we could.

Andrew Bartlett

Andrew Bartlett                       http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba

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