How to find ip's on a network

Hi

Do we have a command or program that lists every machine (ip) connected to a
network? regardeless if the machines have or not running server programs.

For example: if i need to list all the IPs on a network
192.168.0.0/255.255.0.0 what must i do?

i've been trying to do this with nmap, but the results haven't been very
trusty... it fails detecting my printer some times even when it is on and i
can ping it.

Thanks
ArameFarpado

On Wed, 11 Jun 2008 02:29:50 +0100, ArameFarpado
<a-(E-Mail Removed)> wrote:

>Hi
>
>Do we have a command or program that lists every machine (ip) connected to a
>network? regardeless if the machines have or not running server programs.
>
>For example: if i need to list all the IPs on a network
>192.168.0.0/255.255.0.0 what must i do?
>
>i've been trying to do this with nmap, but the results haven't been very
>trusty... it fails detecting my printer some times even when it is on and i
>can ping it.
>
>Thanks
>ArameFarpado

Does 'arp -n' do what you want?
--
buck

On Tue, 10 Jun 2008 19:53:27 -0700, buck passed an empty day by writing:

> On Wed, 11 Jun 2008 02:29:50 +0100, ArameFarpado
> <a-(E-Mail Removed)> wrote:
>
>>Hi
>>
>>Do we have a command or program that lists every machine (ip) connected
>>to a network? regardeless if the machines have or not running server
>>programs.
>>
>>For example: if i need to list all the IPs on a network
>>192.168.0.0/255.255.0.0 what must i do?
>>
>>i've been trying to do this with nmap, but the results haven't been very
>>trusty... it fails detecting my printer some times even when it is on
>>and i can ping it.
>>
>>Thanks
>>ArameFarpado
>
> Does 'arp -n' do what you want?

It did not work on my box, it just listed the gateway.

This application (windoze sadly) does what you want and is freeware. I
would love to know how to do it with Linux myself.

http://www.softperfect.com/products/networkscanner/

On Jun 10, 10:29 pm, ArameFarpado <a-farpado.s...@netcabo.pt> wrote:
> i've been trying to do this with nmap, but the results haven't been very
> trusty... it fails detecting my printer some times even when it is on and i
> can ping it.

It didn't work?

# nmap -sP -n 192.168.*.*

Unless you have a ARP flooding protection mechanism, it should work
fine.

take a look at ettercap AFAIK it uses arp to scan so should not fail.
--
Nurullah Akkaya

ArameFarpado wrote:
> Do we have a command or program that lists every machine (ip) connected to a
> network? regardeless if the machines have or not running server programs.
>
> For example: if i need to list all the IPs on a network
> 192.168.0.0/255.255.0.0 what must i do?

For my 192.168.2.0 network, it's:
nmap -sS -p0 192.168.2.0/24
That gets everything.

For yours?
nmap -sS -p0 192.168.0.0/16

--
As we enjoy great advantages from inventions of others, we should be
glad of an opportunity to serve others by any invention of ours;
and this we should do freely and generously.
--Benjamin Franklin

Em Quarta, 11 de Junho de 2008 17:56, (E-Mail Removed) escreveu:

Hi

> It didn't work?
>
> # nmap -sP -n 192.168.*.*
it wasn't... before

>
> Unless you have a ARP flooding protection mechanism, it should work
> fine.
indeed... i've temporary set a new netmask and a new route, but i've forgot
to re-set the "area" on the firewall parameters, so nmap was not working
fine... and yes, the firewall was blocking ARP protocol.

now, my search for a possible unknown IP is going:
nothing extra in 192.168.*.*

i'm testing now 10.*.*.* and this test will be going on for several hours

this time i'll be sure if my switch own (or not) an IP adress, and with it,
a web based administration page.

and i've learn a lot with you guys

thanks, to all

ArameFarpado

Em Quarta, 11 de Junho de 2008 08:04, Klunk escreveu:

>> Does 'arp -n' do what you want?
>
> It did not work on my box, it just listed the gateway.
>
> This application (windoze sadly) does what you want and is freeware. I
> would love to know how to do it with Linux myself.
read my other reply to "pedro.forum"

>
> http://www.softperfect.com/products/networkscanner/

Ahhh, not really what i've had in mind, but downloaded...
this program would be handy (if i had knowledge of it) a month ago, when i
was confronted with a ip conflit in a windows network.
didn't get to understand why a dhcp server would give to a pc an IP that was
allready used by the web administrative interface of an wireless access
point... with the agravation that none of us known that the AP had a IP
adress for itself. it took us (me and another guy) about 6 hours to
understand what was going on... pretty nut situation


Thanks a lot
ArameFarpado

ArameFarpado wrote:
> Hi
>
> Do we have a command or program that lists every machine (ip) connected to a
> network? regardeless if the machines have or not running server programs.
>
> For example: if i need to list all the IPs on a network
> 192.168.0.0/255.255.0.0 what must i do?
>
> i've been trying to do this with nmap, but the results haven't been very
> trusty... it fails detecting my printer some times even when it is on and i
> can ping it.
>
> Thanks
> ArameFarpado

http://www.angryziber.com

Em Quinta, 12 de Junho de 2008 00:48, Cork Soaker escreveu:

>
> http://www.angryziber.com

Ok, another possible solution...

i've tryied this one just a few hours ago, and it's strange:
how come the program detected more than 11000 active hosts in 10.x.x.x when
there was only 3 pc's, a printer and a switch connected?

wierd...

thanks
ArameFarpado