Re: LibIPQ issue

["Sérgio Bernardino" <sergio.bernardino@gmail.com>]

It was hardly a stupid question. That was precisely the problem!
Such a simple thing and i completely failed to consider that possibility.
Thank you all for your help, it was priceless.

> On Tue, Mar 08, 2005 at 11:08:17PM +0000, Sérgio Bernardino told us:
> > After a bit more time working with this i realized something "interesting":
> > When i send a packet from a machine A to a machine B and capture it in
> > PRE_ROUTING, if i change the destination address so that it points to
> > machine C, the packet disappears and i can't track it anywhere. On the
> > other hand, if i instead change the source address of the packet so
> > that it points to machine C everything works fine. I can "see" the
> > packet traversing into machine B, which receives the packet and
> > promptly replies sending a packet to machine C. Machine A never
> > receives a reply to the packet it sent and machine C receives a reply
> > from a packet it never sent. Exactly the behaviour expected when
> > changing the source address field. Now, if this works in this case,
> > merely changing it to alter the destination address (my original
> > intention) should work also, but it doesn't.
> > My code can't be incorrect in a situation like this, so what exactly
> > is wrong? And is there a away to solve such situation?
> > Ideas anyone?
On Wed, 09 Mar 2005 00:29:28 +0100, Patrick McHardy <kaber@trash.net> wrote:
> 
> Have you got IP forwarding enabled ?
> 
> echo 1 >/proc/sys/net/ipv4/ip_forward
> 
> Regards
> Patrick
> 
> 
On Wed, 9 Mar 2005 00:30:28 +0100, Sven Schuster <schuster.sven@gmx.de> wrote:
> 
> Hi Sérgio,
> 
> Stupid question, but do you have ip_forward set to 1 on machine B??
> 
> Sven
> 
> --
> Linux zion 2.6.11-mm1 #1 Sat Mar 5 13:54:40 CET 2005 i686 athlon i386 GNU/Linux
>  00:28:53 up 3 days,  3:34,  2 users,  load average: 0.12, 0.07, 0.06
> 
> 
> 
-- 
Sérgio Bernardino

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