Re: Apparent Bug in Nmap

[Fyodor <fyodor () insecure org>]

On Thu, Jun 04, 2009 at 02:44:43PM -0700, Fyodor wrote:
> Hi Stanley.  Whether to consider a host "up" can be a touch policy
> decision.  We tend to err on the side of considering hosts up rather
> than being too strict about it.  In this case above, Nmap receives a
> packet purportedly FROM 10.11.0.1 claiming that it is not reachable.
> Well, it was reachable enough that we got a response from that IP, so
> we consider it reachable enough to continue scanning.
>
> Now if the unreachable comes from a different IP address than the
> target, we treat it differently.

By the way, this whole issue reminds me of this famous Monty Python
segment:

http://www.youtube.com/watch?v=dGFXGwHsD_A

Cheers,
-F

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