There is this cool little that helps us create map of local area network. As a bonus, we get the mac and the IP addresses of all the devices in the network. It passively listens for all network traffic and creates a image file for the network map.
Well, the utility is called lanmap.
if you run it without any arguments, it will use the defaults and will create a png image in the current directory named lanmap.png using the first network interface.
lanmap
On my system, it created the following map:
Network map using lanmap
To use a specific interface, use the -i switch
lanmap -i eth1
or you can use wildcard for the interface name, for example,
lanmap -i *3Com*
will use the first interface having the name *3Com* in it.
If you want the image in another format. You can create images in png, gif and svg format.
lanmap -T gif
By default, lanmap generates a report every 60 seconds, use -r to change the default interval.
lanmap -r 30
Lanmap also supports filtering traffic with -f string switch. The string is in libpcab syntax formt.
Link: http://parseerror.com/lanmap/
This is interesting; thanks for the link. As with any passive network utility, it’s limited by the traffic it can see, so the user must be responsible for ensuring the device lanmap is listening to has visibility to the entire network they want mapped.
Did you look at lanmap2 at all?