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Date:      Wed, 30 Apr 2003 12:13:21 -0400 (EDT)
From:      Steve Bertrand <iaccounts@northnetworks.ca>
To:        Darryl Hoar <darryl@osborne-ind.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Firewall & Security Question
Message-ID:  <20030430121228.H58756-100000@diana.northnetworks.ca>
In-Reply-To: <000001c30f31$c6bc01d0$0701a8c0@darryl>

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> Due to some recent activity, I need to be able to
> monitor who is doing what on the internet.  IE,
> maybe a DOS attack being launched through our
> connection, etc.  More than likely, I have a user
> with Kazaa or some other service that is periodically
> pumping out quite a bit of data.
>
> What should I use to snoop this out?  Should I
> connect something between the firewall and the
> ADSL router to log whats happening ?

man tcpdump(8)
Also, possibly install ethereal.

Steve


>
> Any ideas greatly appreciated.  This periodic activity
> brought our DSL throughput down to the point I was
> receiving calls.
>
> thanks,
> Darryl
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