I don't think the location of the rule is the problem. It seems that this line is changing the final destination ip, instead of setting a next hop for my route, i think this because if i ping an external host as yahoo, the ping command returns me values or <10 ms , that are exactly the same values for the ping for the alternate router. So the ping is not reaching yahoo, it seems is reaching only the router as a final destination, instead of routing the packets. Karina. Alistair Tonner wrote: > On February 24, 2002 12:18 pm, Karina wrote: > > Hi, i have this problem.. > > > > I have an iptables-box, that is the default gateway for all my internal > > addresses, after this box all the packets are sending to my main router. > > But now, I need to send one of my internal Class C to another router > > instead of the main one. > > > > I try with this line: > > > > $IPTABLES -T NAT -a PREROUTING -i eth0 -s $THISCLASS -j DNAT --to > > other.router.ip > > > > but it seems this is not working. > > > > If i setup a computer and i put as gateway directly the new router ip > > all works. But , if i setup this same comptuer and i put as gateway my > > iptables-box (all the computers have this settings) this doesn't work. > > The packets sent by my other ip addresses are going to main router as > > usual, but the other class is not going to the alternate router. > > > > Any ideas ? > > Perhaps you have the order of the NAT rules incorrect? > This rule should occurr in the table *before* the default one > that routes the rest of your network. > > Alistair -- LSCI Karina Gómez Salgado mailto:kgs@acabtu.com.mx Systems Administrator & Web Projects Manager BTU Comunicación, S.A. de C.V.
