Re: iptables NATed or not NATed

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Pascal Hambourg <pascal.mail@xxxxxxxxxxxxxxx> wrote:
> Check the state of those packets. Usually, packets which skip NAT are
> those classified in the INVALID state by the connection tracking.

A new packet ( not -syn packet ) would be treated as  INVALID ? . We
can see this packet in NAT table ?

Thanks,
Ratheesh



On Fri, Mar 12, 2010 at 2:09 AM, Pascal Hambourg
<pascal.mail@xxxxxxxxxxxxxxx> wrote:
> Patrick Chemla a écrit :
>>
>> It works, but with tcpdump I have recorded packets on outgoing
>> interfaces where addresses are NOT NATed, means, packets issued from
>> internal servers on eth0, are routed to default route eth2 with there
>> internal address 10.0.0.xx.
>>
>> It is very strange because it is a small percentage of packets, not all
>> the packets from a specific server, directed to the same port than
>> others who are routed and NATed the right way, at the same time.
>
> Check the state of those packets. Usually, packets which skip NAT are
> those classified in the INVALID state by the connection tracking.
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