| Author |
About scanning IPs
|
|
| Leonardo Agustin Espinoza Lagos 2005-04-13, 6:00 pm |
|
Hi!
I'm learning english. My writing is not the best yet.
I have a win2000/NT/98 PCs network with a Linux PC as a gateway. The IPs
are in the classic 192.168.X.X form. The Linux have a DHCP service too.
Are there a way to scanning the used/unused IPs in the net from the Linux
PC? I think there would be a unix command or procedure but I can't get it
in the man library.
Thanks in advance.
------------------------------------------------------------------------
Leonardo A. Espinoza Lagos ------> mailto:lespinoz@dcc.uchile.cl
Escuela de Ingenieria - Facultad de Ciencias Fisicas y Matematicas
Universidad de Chile ---- CHILE
========================================
================================
| |
| Greg Beeker 2005-04-13, 6:00 pm |
|
Leonardo Agustin Espinoza Lagos wrote:
> Hi!
>
> I'm learning english. My writing is not the best yet.
>
> I have a win2000/NT/98 PCs network with a Linux PC as a gateway. The
IPs
> are in the classic 192.168.X.X form. The Linux have a DHCP service
too.
>
> Are there a way to scanning the used/unused IPs in the net from the
Linux
> PC? I think there would be a unix command or procedure but I can't
get it
> in the man library.
try nmap.
http://www.insecure.org/nmap/
Be careful that you don't scan another IP range that you don't 'own'.
| |
| Ian Wilson 2005-04-14, 7:51 am |
| Leonardo Agustin Espinoza Lagos wrote:
>
> Hi!
>
> I'm learning english. My writing is not the best yet.
>
> I have a win2000/NT/98 PCs network with a Linux PC as a gateway. The IPs
> are in the classic 192.168.X.X form. The Linux have a DHCP service too.
>
> Are there a way to scanning the used/unused IPs in the net from the
> Linux PC? I think there would be a unix command or procedure but I can't
> get it in the man library.
>
> Thanks in advance.
>
> ------------------------------------------------------------------------
> Leonardo A. Espinoza Lagos ------> mailto:lespinoz@dcc.uchile.cl
> Escuela de Ingenieria - Facultad de Ciencias Fisicas y Matematicas
> Universidad de Chile ---- CHILE
> ========================================
================================
Have a look at arpwatch, unlike nmap it just runs continuously in the
background and (if I remember correctly) can email you whenever a new IP
address appears or when an IP-address is reused by a different PC.
Obviously, nmap will miss PCs that are currently turned off. Whether
this matters depends on what you want to achieve.
There will also be a log file of addresses handed out by the DHCP service.
|
|
|
|