Re: NMAP BUG ?

[David Fifield <david () bamsoftware com>]

On Tue, Nov 10, 2009 at 09:45:06AM +0100, fbartalini () libero it wrote:
> > On Fri, Sep 11, 2009 at 05:43:22PM +0200, fbartalini () libero it wrote:
> > > I have installed nmap 5.0 + zenmap on my Windows XP SP2 PC .
> > > If I run
> > >   nmap -p 1-65535 -T4 -A -v -PE -PS22,25,80 -PA21,23,80,3389 85.40.168.187
> > > it report no ports open (all filtered) but I  know that this  IP
> > > address has port 6464 open and if I run nmap as
> > >   nmap -p 6464 -T4 -A -v -PE -PS22,25,80 -PA21,23,80,3389 85.40.168.187
> > > it report correctly that port is open. You can try it. Why the first
> > > command don't report this port as open ?
> >
> > Both commands should find the open port. It could be that -T4 is too
> > fast for this particular host. Try it again without -T4 and see if the
> > results are different.
>
> I try without -T4 but results are the same : "All 65535 scanned ports
> on host187-168-static.40-85-b.business.telecomitalia.it
> (85.40.168.187) are filtered".
> Other idea ?

Try using different port ranges to narrow down the point at which the
port stops being recognized.

-p 1-65535
-p 1-32767
-p 1-16383
-p 1-8191
-p 6000-7000
-p 6400-6500
-p 6460-6470
-p 6464

Let us know which of those ranges work and which don't.

David Fifield
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