Re: [LIP] packet analyzing and capturing ?

On Wed, Oct 22, 2003 at 03:46:12PM -0700, Linux Enthu wrote:
> 1. Send a subnet broadcast of ICMP echo request (Ping), to find out what
> all machines are there in your subnet. But if some machine does not
> respond to Ping, you won't know about them. I believe Windows machines
> will not respond to broadcast pings, as those morons in redmond think
> that is a security issue (Huh!!).

Or loop through your subnet parallely and send directed pings, which is
what nmap -sP -PI does. I find it more reliable than ping -b. The above
behaviour is not unique to Microsoft, as I have figured out recently -
a number of devices have TCP/IP stacks that do not respond to broadcast
pings. nmap has other techniques to detect hosts that block pings
altogether.

Binand

-- 
Russian Roulette with Unix:
while :; do kill $RANDOM &> /dev/null && break || sleep 1; done


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