"broadcast-ping" existing?

hello NG,

is there a tool or bash- command, with wich i can scan a whole subnet?

e.g:
i am in the subnet 192.168.0.0

now instead of pinging each node single, i would like to do a kind of
"broad-cast-ping", wich pings from 192.168.0.1 - 192.168.0.255 and lists all
nodes wich where found.

any clew?

thanx,
tom.
____________________ http://tom.lautenbacher.biz ____________________

"Tom H. Lautenbacher" <(E-Mail Removed)> schrieb
> hello NG,
>
> is there a tool or bash- command, with wich i can scan a whole
> subnet?
>
> e.g:
> i am in the subnet 192.168.0.0
>
> now instead of pinging each node single, i would like to do a
> kind of "broad-cast-ping", wich pings from 192.168.0.1 -
> 192.168.0.255 and lists all nodes wich where found.
1.) ping:
ping -b
ATTENTION: not every host responds to broadcast pings

2.) bash & ping

$ for i in `seq 1 254`; do
> ping -c 1 -t 1 192.168.0.$i >/dev/null 2>&1
> if [ $? -eq 0 ]; then
> echo "host $i is UP"
> fi
> done
host 5 is UP
host 7 is UP
....

3.) specialized tool
nmap - the Rolls-Royce for such jobs

4.) others
I am sure there are other methods, these are left as an exercise
for the reader.

>
> any clew?
clue ?

HTH
Martin

On Fri, 19 Dec 2003 19:49:04 +0100, Tom H. Lautenbacher wrote:
> hello NG,
>
> is there a tool or bash- command, with wich i can scan a whole subnet?
>
> e.g:
> i am in the subnet 192.168.0.0
>
> now instead of pinging each node single, i would like to do a kind of
> "broad-cast-ping", wich pings from 192.168.0.1 - 192.168.0.255 and lists all
> nodes wich where found.
>
> any clew?

man ping ?

ping -bc 2 192.168.1.255

Not all systems/OSs may respond to broadcast pings.


man arp
man nmap if you loaded it.

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hello Martin!

> > is there a tool or bash- command, with wich i can scan a whole

> 3.) specialized tool
> nmap - the Rolls-Royce for such jobs

thanx a lot for your tips,

greetings,
tom.