[mrtg] monitoring iptables

[Beluc]

Hello,

i have a server with some extra failover public interfaces where i'm
sending some kind of traffic on a round robin way using iptables SNAT :

auto eth1:0
iface eth1:0 inet static
        address 1.1.1.1
        netmask 255.255.255.255
        broadcast 1.1.1.1

auto eth1:1
iface eth1:1 inet static
        address 2.2.2.2
        netmask 255.255.255.255
        broadcast 2.2.2.2

auto eth1:2
iface eth1:2 inet static
        address 3.3.3.3
        netmask 255.255.255.255
        broadcast 3.3.3.3

# iptables -L -n -t nat -v
[...]
Chain POSTROUTING (policy ACCEPT 10 packets, 685 bytes)
 pkts bytes target     prot opt in     out     source
destination
  546 32760 SNAT       all  --  *      eth1    0.0.0.0/0
1.2.3.0/22     statistic mode nth every 3 to:3.3.3.3
  546 32760 SNAT       all  --  *      eth1    0.0.0.0/0
1.2.3.0/22     statistic mode nth every 2 to:2.2.2.2
  546 32760 SNAT       all  --  *      eth1    0.0.0.0/0
1.2.3.0/22     statistic mode nth every 1 to:1.1.1.1
 614K   41M MASQUERADE  all  --  *      eth1    0.0.0.0/0          0.0.0.0/0

all this is working fine !

i'm already monitoring physical interface (eth1) of that server using
mrtg/smp and now, i would like to monitore pkts/bytes passing through extra
interfaces.
i searched a bit if iptables is reachable via snmp but cannot find anything.

does somebody know a way to achieve this ?

Regards,
Marco
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