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Date: Fri, 09 Oct 2009 20:00:16 +0100
From: Vincent Hoffman <vince@unsane.co.uk>
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To: Jay Hall <jhall@socket.net>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Capturing netflows
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Jay Hall wrote:
> I have run into a need to capture netflows from the internal interface
> of my FreeBSD 6 server.  The internal interface is em0 and the
> external interface is em1.
>
> I am using the following to setup the netflows.
>
> /usr/sbin/ngctl -f- << SEQ
>     mkpeer em0: netflow lower iface0
>     name: em0: lower netflow
>     connect em0: netflow: upper out0
>     mkpeer netflow: ksocket export inet/dgram/udp
>     msg netflow:export connect inet/1.2.3.4:12345
> SEQ
>
> When I run the commands above, I receive the following message.
>
> ngctl: send msg: No such file or directory
> ngctl: line 1: error in file
>
> I am at a complete loss here.  My understanding of netgraph is poor at
> best.  Any suggestions would be appreciated.
>
Been a while since I used it but I used to use this script based on this
email
http://www.mail-archive.com/freebsd-questions@freebsd.org/msg103671.html

#!/usr/sbin/ngctl -f
                   mkpeer fxp0: tee lower right
                   connect fxp0: fxp0:lower upper left
                   mkpeer fxp0:lower netflow right2left iface0
                   name fxp0:lower.right2left netflow
                   mkpeer netflow: ksocket export inet/dgram/udp
                   msg netflow:export connect inet/w.x.y.x:6667



hope that helps,
Vince
> Thanks,
>
> Jay
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