Re: Query regarding OS detection

[Kris Katterjohn <katterjohn () gmail com>]

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On 10/28/2010 06:46 AM, priyank garg wrote:
> Hi,
> I need to do OS detection for all the hosts on a large network. I don't want
> information about the open ports on these hosts but OS scan is unreliable
> without port scan as it needs at least one open and one closed port. Is
> there a way to stop port scan as soon as it finds an open port and doesn't
> proceed with scanning other ports as the OS information is only what I want.

Several years ago I submitted a quick patch[1] to add a --osscan-quick option
for this very idea, but it was decided against during private discussion.

> Thanks.
> ~Priyank

Cheers,
Kris Katterjohn

[1] http://seclists.org/nmap-dev/2007/q2/index.html#389

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