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Date:      Thu, 28 Feb 2002 14:02:38 -0600
From:      Dan Nelson <dnelson@allantgroup.com>
To:        FreeBSD user <freebsd@XtremeDev.com>
Cc:        questions@FreeBSD.ORG
Subject:   Re: Network Statistics?
Message-ID:  <20020228200228.GA32540@dan.emsphone.com>
In-Reply-To: <20020228121942.F83104-100000@Amber.XtremeDev.com>
References:  <20020228121942.F83104-100000@Amber.XtremeDev.com>

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In the last episode (Feb 28), FreeBSD user said:
> After reading the recent posts on DRDoS and historical syn floods,
> I've become interested in finding and displaying network statistics
> on my FreeBSD machine. To start, netstat -nidb would only give me a
> little of what I'm looking for. Specifically, I want to see info on
> incoming rates of syn packets that has no corresponding ack packets
> to my syn/ack packets (me being used as a reflector), etc. Is there
> an tools that would show this to me? Has anyone setup something
> similar in FreeBSD with MRTG? If so, can you share your config
> scripts on how to better detect this sort of thing? Thanks in
> advance.

Try netstat -s;  netstat -i is per-interface stats that are usually at
the ethernet level, and you're looking more for TCP-level stats.  I
don't know if any of these values are exported via net-snmp.

-- 
	Dan Nelson
	dnelson@allantgroup.com

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