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Network Security Nessus-Users
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Re: How to use Nessus 3.0.3 (Linux) with Nmap port scanning

Subject: Re: How to use Nessus 3.0.3 (Linux) with Nmap port scanning
Date: Wed, 20 Sep 2006 12:28:05 +0200
On Wed Sep 20 2006 at 01:25, A User wrote:

Is there a way to enable "find_service" to use UDP results?

No, but external_svc_ident.nasl can do that. 

Believe it or  not, there are people out there who understand UDP
services need to be evaluated

Remember that you would need a find_service_udp only if a service
runs on a non standard port. This is very uncommon for UDP.
Standard ports are tested by Nessus.

There are devices that people may not be allowed local accounts as
this can be intrusive 

A find_service_udp would be much more intrusive.

Based on those comments

Which are untrue, because you forgot that UDP standard ports are
tested.

Nessus is not giving a true picture

What is a "true" picture?

and  personally I find it frustrating not being able to use one piece of 
software to perform a complete and thorough review.

Can you afford to run nmap -sU -sV for days to get this true picture?
netstat -p would give it instantly.

It should be possible for those users who properly understand the 
limitations of certain OSes / TCP/IP stacks to be able to get a full 
picture.

If such a find_service_udp were written, it would be disabled if 
(safe_checks || ! thorough_checks) 
As most people are running in safe checks and do not set "thorough
tests", this would be useless for 99% of users.

Otherwise you end up making an unreasonable compromise between speed
and accuracy. 

You have to.

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