Hi, Have a 200.40.226.64 /28 net *public NET have a 192.168.1.0 /24 net *private NET have a 200.40.226.66 server running iptables * Is the gateway have a VoIp box THIS is the PROBLEM. i need to put behind the firewall and have the address 192.168.1.33 but i need to go outside with 200.40.226.69 and received external requirements with this ip but iptables not function for me. i Put this lines but dont work i need Route? or something else??? echo 1 > /proc/sys/net/ipv4/ip_forward . . . iptables -t nat -A POSTROUTING -s 192.168.1.33/255.255.255.255 -o eth0 -j SNAT --to 200.40.226.70 iptables -t nat -A PREROUTING -s 200.40.226.70/255.255.255.255 -i eth0 -j DNAT --to 192.168.1.33 ## When i put this lines the conecction for .33 down. if possible to need some instructions, for route this to my gateway??? #. . . . iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE iptables -A FORWARD -j ACCEPT -i eth0 -o eth0 -d 0/0 Any help me???? please? -- Pablo Allietti LACNIC Registro de Direcciones de Internet para America Latina y el Caribe Registro de Enderecamento de Internet para America Latina e Caribe Latin American and Caribbean Internet Addresses Registry Potosi 1517 Montevideo - Uruguay Tel. +598 2 6015846 // 6062822 Fax: 6015599