Re: NAT for locahost to IP LAN for mail services

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Mmmm.... a lot of thanks for the help... so was a change... Jeje...
well now i'm using rinetd to redirect my localhost ports to another
interface and its working, very simple using /etc/rinetd.conf..

Thanks...

Alan Jairo Acosta

On Sat, Nov 29, 2008 at 10:30 AM, Pascal Hambourg
<pascal.mail@xxxxxxxxxxxxxxx> wrote:
> Zagato a écrit :
>>
>> Hi.. thanks for the answer... but i really sure that my old rules
>> works fine on centos 4.2, when i upgrade to 5.2 psql -h localhost -p
>> 5432 test have the same symptomatic, maybe a kernel module that i need
>> to modoprobe ? what chage that my old rules doesn't work anymore... ?
>>
>> Centos 5.2 kernel: 2.6.18-92.el5
>
> According to a quick search it seems that Centos 4.2 included a kernel
> 2.6.9. In kernels before 2.6.11, the DNAT target in the OUTPUT chain used to
> change the source address to reflect the new output interface. This is not
> true for newer 2.6 kernels due to a change in kernel 2.6.11.
>
> From <http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.11> :
> ========================================================================
>  [PATCH] Remove do_extra_mangle: double NAT on LOCAL_OUT
>
>  On NF_IP_LOCAL_OUT, when destination NAT changes the destination
>  interface, we also change the source address, so the packet is the
>  same as if it were generated to go that way in the first place.  This
>  is not strictly necessary, I believe.
>
>  This patch rips that code out to see what breaks.
> ========================================================================
> (Well, you can see what breaks)
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