Re: bytes counting

[Antony Stone <Antony@Soft-Solutions.co.uk>]

On Friday 23 April 2004 6:22 pm, Joao TERRA wrote:

> You can put the rule on:
> #iptables -t mangle -I POSTROUTING -o INTERFACE_OF_192.168.0.50_SUBNET -d
> 192.168.0.50
> then you can account in both directions separately

Unfortunately this would count bytes going to 192.168.0.50 from anywhere 
(including the other private LAN), not just from the Internet, which is what 
was required, I believe.

Regards,

Antony.

> ----- Original Message -----
> From: "Arrizabalaga, Saioa" <sarrizabalaga@ceit.es>
> To: <netfilter@lists.netfilter.org>
> Sent: Friday, April 23, 2004 10:42 AM
> Subject: bytes counting
>
>
> Hello everyone,
>
> I have been reading some mails in this listing and it is said the best
> place to count bytes/packets is the mangle table, but I have a problem.
>
> I have three network cards in my linux box: eth0 (private LAN), eth1
> (private LAN) and eth2 (internet).
>
> I would like to count the bytes/packets from/to 192.168.0.50 (it is in
> eth0) that goes/comes to/from internet (eth2).
>
> These are the rules I have:
>
> iptables -A POSTROUTING -t mangle -o eth2 -s 192.168.0.50
>
> With this rule I catch all the packets going from 192.168.0.50 to eth2,
> but I know where to put the rule to catch the packets going from eth2 to
> 192.168.0.50, because as far as I can see it, when I put the rule:
> iptables -A PREROUTING -t mangle -i eth2 -d 192.168.0.50 nothing is
> caught because the packet has not been SNAT-ed yet. Am I wrong?
>
> Any help would be appreciated.
>
> Saioa Arrizabalaga

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