I have a Linux router with 2 NICs doing masquerade from network 192.168.0.0/24 to an ADSL router. users <----> NIC A [router] NIC B <----> INTERNET Now I'm experimenting with proxy arp on the NIC A to intercept all the IP requests in the network. I have a pool of addresses in the 192.168.0.0/24 network for this users. How can I translate, saythe IP10.0.0.64to192.168.0.64` in order to grant it internet access? I have already tried SNAT - DNAT, even I have written a NFQUEUE app to spoof the IP address with no luck.