DHCP access

Olaf Hoyer ohoyer at gaff.hhhr.ision.net
Sun Feb 22 06:42:06 PST 2004

On Sun, 22 Feb 2004, Marty Landman wrote:

> At 05:04 PM 2/21/2004, Chuck Swiger wrote:
> >Marty Landman wrote:
> >
> >>looks like arp is unreliable for a canonical list of plugged in ip's.
> >>Curious about what would work.
> >
> >"nmap -sP 22" should do it
> %nmap -sP 22
> Starting nmap V. 3.00 ( www.insecure.org/nmap/ )
> Target host specification is illegal.


The syntax to ping a whole /24 segment would be:

nmap -sP

this will work.

after this you will also have some output from the arp -a command,
because the arp cache has to be filled somehow.

Olaf Hoyer        ohoyer at gaff.hhhr.ision.net
Fuerchterliche Erlebniss geben zu raten,
ob der, welcher sie erlebt, nicht etwas Fuerchterliches ist.
(Nietzsche, Jenseits von Gut und Boese)

More information about the freebsd-questions mailing list