On Fri, 26 Apr 2002, Renaud Deraison wrote:

> On Fri, Apr 26, 2002 at 10:06:51AM +0200, Ha Nguyen wrote:
> > x.y.z.40/31     x.y.z.40-42                             x.y.z.40-41
> 
> /31 is not a valid netmask. 
> 
> > x.y.z.40/30     x.y.z.40-42                             x.y.z.40-43
> 
> This is right, however the last address of a network is considered as
> being the broadcast address -something you usually don't want to scan.
> Hence Nessus always skip the last address.

If you skip the broadcast part you should also skip the network part.

However the fact that one does use a /29 netmask in nessus does not mean 
that it is the netmask of the targets. So skipping addresses based on an 
assumption is incorrect.

I would suggest you scan them all. Scanning networks also results in 
duplicate findings. It is the user of nessus that need to use his/her head 
in interpreting the findings.

Hugo.

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