If you only want to find out which hosts are active maybe you should try
with a ping scan? What happens if you do:
sudo nmap -sP xxx.xxx.xxx.0/24
or, more like your example:
sudo nmap --send-ip -sP -T4 -PS:22,23,80,135,513,514 -PU:161
xxx.xxx.xxx.0/24
On Wed, 10 Jan 2007 15:31:05 +0000, "Tim Edwards"
<tkedwards_at_fastmail.com.au> said:
> Hi,
>
> I'm trying to work out the root cause of a problem we're having where
> nmap reports all possible IPs in a network as having active hosts when
> run as root:
> sudo /usr/bin/nmap -sT -T4 -p T:22,23,80,135,513,514,U:161
> xxx.xxx.xxx.0/24
> (reports all 256 possible IPs as having active hosts)
>
> nmap -sT -T4 -p T:22,23,80,135,513,514,U:161 xxx.xxx.xxx.0/24
> (correctly reports only what's there)
>
> Does anyone know why these results would be different?
>
> Thanks
>
> Tim Edwards
>
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Received on Jan 11 2007
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