Hi, I have a Linux router box configured: Wanpipe1: upstream isp eth1: downstream isp1 -- (public address 209.aaa.aaa.x) must not be Nat'd eth2: downstream isp2 -- same 209.bbb.bbb.x eth3: company1 on 192.168.254/253/252.0 (3 class c private) must be NAT'd eth4: company2 on 192.168.1.0/24 must NAT'd All NAT'd "outside" addresses should show as one of isp1's addresses, so just one fixed public address like 209.aaa.aaa.13, for example. Is it possible to accomplish this with iptables? Del W.