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From: "Ming-Ching Tiew" <mingching.tiew@redtone.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] NAT-aware traffic analysis
Date: Thu, 06 Sep 2007 05:56:32 +0000	[thread overview]
Message-ID: <00f701c7f04a$ad1d1940$0100a8c0@MingChing> (raw)
In-Reply-To: <00af01c7ef6a$1c8a3560$0100a8c0@MingChing>


From: "Marco Aurelio" <marco.casaroli@gmail.com>

> If you use IFB or IMQ you can shape the outgoing WAN traffic before NAT
>

I am not sure if I understand this reply or the reply seems to me,
is not replying to my original question.

I am asking how to collect statistics about LAN users with respect
to their WAN usage, with LAN IP as the breakdown.

I am not asking how to do traffic shaping. And may I know how
does IMQ help that ?

Actually with more thought given to the problem, I think I am
quite inclined to using iptables ULOG. But ULOG solution
has a few things need mentioning :-

1. Might be very heavy on system loading. Hope people can
    clarify if it is a real concern. And anyone has experience using
    ULOG 2.x ? Will 2.x be more friendly to system loading
    compared to 1.x ?

2. Logging goes into either file or database. It's to be a offline
    monitoring mechanism. Is there a way to use ULOG for online
    monitoring ?

3. Next, each ULOG is only specifying one side of the traffic. eg :-

        iptables -A FORWARD -i eth0 -o eth1 -j ULOG .....

    I will need another iptables rule to specify the returning traffic, eg
:-

        iptables -A FORWARD -i eth1 -o eth0 -j ULOG .....

   Combining two independent logs as one connection will still be a
challenge.

Hope to see more suggestions and discussion.
Thank you.



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  parent reply	other threads:[~2007-09-06  5:56 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-05  3:09 [LARTC] NAT-aware traffic analysis Ming-Ching Tiew
2007-09-05  3:36 ` Salim S I
2007-09-05  4:00 ` Ming-Ching Tiew
2007-09-05  4:20 ` Martin A. Brown
2007-09-06  5:42 ` Marco Aurelio
2007-09-06  5:56 ` Ming-Ching Tiew [this message]
2007-09-06 18:20 ` Marco Aurelio

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