odd nmap results

[brianwgray at gmail.com (Brian Gray)]

    It could be the difference between using a business class line vs. a
consumer line. If it's business class, you may consider contacting the ISP
about the filtering and their policies on using the line for assessments
especially if scanning will occur on a regular basis.

On Wed, Oct 7, 2009 at 12:16 PM, Butturini, Russell <
Russell.Butturini at healthways.com> wrote:

>  Has anyone experienced filtering by an ISP affecting their nmap results?
> During a recent external port scan of some IP space, using a full connect
> scan, I discovered that tcp ports 25, 135, 139, 445, and 1025 were all being
> listed as filtered.  The SMTP port I can understand as this particular
> provider doesn?t allow SMTP connections to anyone other than their own mail
> servers, but the windows SMB ports sort of blew my mind, particularly since
> this provider?s equipment serves as a firewall/router in one device and
> everything is NATed.  Very frustrating because now I have to clean up the
> results. Any suggestions how to work around this?
>
>
>
>
>
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-- 
-Brian W. Gray
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