Re: nmap strangeness
Viktor Rosenfeld wrote:
>
> Hello list,
>
> I have a problem. I am trying to portscan an entire network (Nope, I'm
> not a script kiddie, I just have to find out what Linux boxen are
> installed on the corporate network which I am supposed to administer),
> and I use `nmap -O XXX.XXX.XXX.0/24` as root to find out the OS the
> boxen are running. Unfortunately, nmap is unable to find some hosts
> when scanning an entire network. However if I portscan that machine
> directly, it is up and running and nmap reports the open ports
> correctly.
>
> Any idea, what could be the cause for nmap's failure to correctly
> identify a box as up? This box has no ipchains installed and it is
> responding to pings like a charm.
>
> Are there any other tools that reliably tell whether a machine is up or
> not?
try portscanning as well as OS identification:
nmap -O -p 1-512 XXX.XXX.XXX.0/24
see if that helps .. or if you just want to see who is up:
nmap -sP XXX.XXX.XXX.0/24
(this is using nmap 2.12)
if it still doesn't work try the latest version of nmap www.insecure.org/nmap
nate
--
:::
ICQ: 75132336
http://www.aphroland.org/
http://www.linuxpowered.net/
aphro@aphroland.org
Reply to: