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Re: Helping NMap Get Better OS Detection
From: Jake Kallman <jkallman () unr nevada edu>
Date: Fri, 9 Apr 2004 12:45:00 -0700 (PDT)

This is actually something that I am looking to integrate into a package
that I am developing that I posted a few months back.  I'm hoping to write
a MAC address scanning ability into the network monitoring program that I
am currently writing.  Unfortunately it is being pushed back, as the
semester nears an end and the pressure to get a first release of the
package for my undergrad class out is mounting.  However, over the summer
I'm hoping to get a few things done, MAC address collection for machines
on a LAN being one of them.  If i can get something out over the summer I
will keep you updated.

Jake

On Thu, 8 Apr 2004, MadHat wrote:

On Apr 8, 2004, at 9:39 PM, Alan S. Jones wrote:
At 09:33 PM 4/8/2004 -0500, MadHat wrote:
On Apr 8, 2004, at 8:24 PM, Alan S. Jones wrote:
You can only report the MAC if it is on the local network.  If it has
to get past switches into another subnet, the MAC is not included.
The
only way I know around this is to use some protocols that report the
MAC, the main one being NetBIOS and the nbtstat packets on udp/137,
but
without that there is little you can do to get the MAC from a
distance.

This is actually what I was thinking, when available i.e. on a Local
LAN
same subnet, etc NMap should report the MAC address.  If it can't
figure it
out don't worry, but the default should report it if it can be
obtained.

This would be helpful for local LAN diagnostics and getting all the
info in
one place.

Ah.  This was discussed back on Feb 26th of this year and Fyodor did
say:

"I would like to print the MAC address for a host based on the packets
received.  As Testic mentions this will only work on a LAN.  And of
course only on Ethernet and similar systems (like 802.11B).  It is
still valuable enough that I hope to add it this year.  If someone
wants it desperately enough, you can consider sending a patch earlier
:).  I might also do a number-of-hops test of some sort both as useful
information in itself and to determine whether the next hop is the
actual target and thus corresponds to the received MAC."

So, yes it would be nice, and will probably be added, but Fyodor is
working on his books lately, so I doubt it will be added soon, unless
someone else steps up.


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