Re: hosts NOT alive

["DePriest, Jason R." <jrdepriest () gmail com>]

On 2/27/07, Jesse Charbneau  wrote:
> joe sadfsdf wrote:
> > Hello All,
> >
> > Give a list of hosts, I want to determine which ones are DOWN. I'm
> > trying NMap because it can give me really interesting info about the
> > hosts which are up, but I can't get it to just tell me who is down!
> >
> > nmap -iL c:\my_host_list.txt -sP -oN c:\scan_results.txt
> > -append-output -v -log-errors
> >
> > In the command shell, these options show me which hosts are up and
> > which are down, however scan_results.txt only contains information
> > about which hosts were up. In the command shell and my resulting file,
> > I only want to log information about which hosts are down... how do I
> > do this?
> >
> > thanks
> >
> > joe
> >
> > ps, i hope this isn't a repost... i sent earlier but i think it was
> > denied.
> how are your hosts configured? Are they firewalled?
>
> for simple testing, I usually do something like `ping -c 2 -w 1
> [host|ip] > /dev/null && echo Alive || echo down`
>
> that assumes that the hosts are not blocking pings.

nmap -sP <IP List> | grep 'appears to be down'

That works for me.

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