On Thu, 2014-08-21 at 22:03 -0700, ToddAndMargo wrote:
> Hi All,
> 
> I have a Windows program
> 
>      http://sourceforge.net/projects/autoscan/
> 
> that will find all the MAC address on a Ethernet.
> Last time I used it, it found stuff on 192.168.1.0/24
> and 192.168.88.0/24.  Helped me fix everything so
> they were on the same network.
> 
> There is a Linux tarball for autoscan, but I can not
> find an RPM for it.  And, the tarball has no spec
> file in it.
> 
> I could really use this functionality on Linux.  As
> far as I can tell, nmap will only locate stuff on
> the current network, not everything on the Ethernet.
> 
> Any idea how to do this with nmap or similar?  I
> would really like to use nmap, if I could.
> 
> I have tried "overlook fing", but it only finds stuff
> on the current network.
> 
> Many thanks,
> -T
> 
> 
> 

Hi Todd,

You can use nmap -sP <network>\<prefix>, sample output below:

Starting Nmap 6.40 ( http://nmap.org ) at 2014-08-22 05:00 EDT
Nmap scan report for xxx.xxx.xxx.xxx
Host is up (0.00070s latency).
MAC Address: 00:26:F0:1F:3A:80 (Raspberry Pi Foundation)
Nmap scan report for xxx.xxx.xxx.xxx
Host is up (0.00019s latency).
MAC Address: 00:20:AB:8C:8F:2D (Raspberry Pi Foundation)
Nmap scan report for xxx.xxx.xxx.xxx
Host is up (0.00024s latency).
MAC Address: 00:20:CB:E0:B9:65 (Raspberry Pi Foundation)