Re: radialnet

["Richard Sammet" <richard.sammet () googlemail com>]

hi Sara,

that's because nmap splits up the full range you entered into smaller
groups. in your case the size of the groups is 4096 (which means it
will scan 16 groups).

you can change that behavior with the following option:
--min-hostgroup <numhosts>; --max-hostgroup <numhosts> (Adjust
parallel scan group sizes)

and for your second question: how long did you wait? is the
destination network firewalled? maybe you should try to apply a more
aggressive timing option like -T5?

it could be the case that it just take that long because of a lot of
retransmissions (dropping firewall).


greetings,
richard


On Tue, Sep 16, 2008 at 3:27 PM, sara fink <sara.fink () gmail com> wrote:
> I am scanning a large network  xxx.xxx.0-255.0-255. This should scan 65536
> hosts. Why does it show
>
> Initiating Parallel DNS resolution of 4096 hosts. at 16:02
> Completed Parallel DNS resolution of 4096 hosts. at 16:03, 36.63s elapsed
> Initiating SYN Stealth Scan at 16:03
> Scanning 64 hosts [1000 ports/host]
>
> My second question is that the scan appears to be stuck at 0.99%. Zenmap is
> not build to search such a large range?
> I need it for topology visualization of the net with radialnet.
>
> The command I run is nmap  --traceroute -v -sS -sV -T4 -PN
> xxx.xxx.0-255.0-255 .
>
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