From owner-freebsd-questions@FreeBSD.ORG  Wed Apr  5 03:51:48 2006
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Date: Tue, 04 Apr 2006 20:51:31 -0700
From: "Jason C. Wells" <jcw@highperformance.net>
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Cc: "Rodrigo G. Tavares de Souza" <rodrigo@sensorsistemas.com.br>,
	freebsd-questions@freebsd.org
Subject: Re: Network traffic Monitor
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Eric Schuele wrote:
> Rodrigo G. Tavares de Souza wrote:
>> Hi,
>>
>>    I getting a problem with a DSL connection, and I need a way to 
>> monitor the network traffic.
>>    I found a program called Netsaint, could I do it with this one?

It depends on what your monitoring focus is.  If you just want to do 
some quick troubleshooting, ping and traceroute are probably all you need.

If you are looking for intrusion monitoring snort is the leading tool 
for that. (last time I checked)

If you are looking for traffic graphing you might look at RRDTool/MRTG.

It depends on what your specific problem is.

Surf through ports/net and ports/sysutils for all kinds of good tools.

Later,
Jason C. Wells