[44net] IP Protocol 4 in DD-WRT and rip44d script

Hi all, Is anyone using a DD-WRT router (I use a TL-WR1043ND with DD-WRT) for his/her AMPRnet GATEWAY 44.154.0.1? I have the following problem here. I have included support in my DD-WRT Router's IPTABLES for IPIP (IP Protocol 4) with the command "iptables -t nat -A PREROUTING -p 4 -j DNAT --to 192.168.250.66" in it's Firewall, but this does not seem to work. I wonder if I need to also port forward UDP port 520 to the same IP, but I don't think so because I think rip44d uses UDP port 520 for outgoing packets only. When I put my GATEWAY's ethernet IP (192.168.250.66) in DMZ then rip44d works fine, but then my AMPRnet GATEWAY is really exposed and I need to write an extensive IPTABLES SCRIPT. Is there a way for rip44d to work behind NAT? Is my "iptables -t nat -A PREROUTING -p 4 -j DNAT --to 192.168.250.66" command enough for my DD-WRT or am I wrong? Could anyone help please? 73 de Demetre SV1UY IP coordinator for AMPRnet in Greece e-mail demetre.sv1uy(a)gmail.com