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Re: How to use Nessus 3.0.3 (Linux) with Nmap port scanning

from [Michel Arboi] Network Security [Permanent Link]
Subject: Re: How to use Nessus 3.0.3 (Linux) with Nmap port scanning
Date: Thu, 21 Sep 2006 17:32:14 +0200 
On Thu Sep 21 2006 at 17:02, Nordwall, Douglas J wrote:


I am not scanning all those ports. Certainly, I would not consider doing
a slow scan for 65k ports. Even the polite setting in nmap would take 8
horus. However, a few targetted ports that you suspect are open are
handy for bypassing certain things.


If all services are running on standard ports, you can set only a
couple of ports in "Port range" and unset "Consider unscanned ports as
closed". That way, each script will connect to its default port.
Not perfect, but it should work.


First off, I didn't mean to denegrate your experience. I have no doubt
that yours is broader than mine in many areas. 


Every experience is valuable. I appreciate your feedback.

I thought that I could design a "universal" port scanner. I still hope
it is possible, but it is harder than expected.


However, occasionally, we have a tough nut to crack and need to pull
out a different tool. 


Are you sure of your figures? If I understood the situation well, if
some workstation needs to connect to this nasty machine and the user
enters a bad port, the OS will retransmit a couple of SYN packets in a
few seconds.... and the workstation will be blacklisted.

-- 
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