The solution was found by Patrick in 2.4 kernel sources.
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Francois-Xavier Le Bail <fx.lebail@yahoo.com>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
                map.to = NOCT1(&ct->tuplehash[!dir].tuple.dst.u3.ip);
        } else {
                /* DNAT replies */
-               map.from = NOCT1(&ct->tuplehash[dir].tuple.src.u3.ip);
-               map.to = NOCT1(&ct->tuplehash[!dir].tuple.dst.u3.ip);
+               map.from = NOCT1(&ct->tuplehash[!dir].tuple.src.u3.ip);
+               map.to = NOCT1(&ct->tuplehash[dir].tuple.dst.u3.ip);
        }
 
        if (map.from == map.to)