detect new devices on network

Brian Raaen braaen at
Wed May 14 16:42:22 UTC 2008

I run a program called ARP-watch on my debian box.  It passively monitors for 
arps from unknown mac addresses and notifies me.  If you have a box that can 
listen on all the vlan(s) you have then this seems to work pretty well.  An 
added plus is it detects not only dhcp clients, but those that try using 
hardcoded addresses.

Brian Raaen
Network Engineer
braaen at

On Wednesday 14 May 2008, Gerry Reno wrote:
> Hello all,
>   Is there a way with any dhcp server that I can know when dhcp gave out 
> a new lease to a new device?  When someone plugs in a pc, phone, laptop 
> to the network I'm looking for a way that I can receive notification of 
> the event and the ip assignment.
> Regards,
> Gerry
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part.
URL: <>

More information about the dhcp-users mailing list