Hello. I have a problem in my network. i need to substitute my internet line with 16 public ip with another line with other 16 ip. my current functioning situation is: 1 lan 192.168.100.0/24 1 dmz 10.100.200.0/24 1 public zone 80.x.x.16/29 this 3 network are connected wit an iptables machine. fot lan i use nat for navigate, for dmz i use port traslation to public my service in the public zone. all function well for 2 years. now i need to change my public zone without loss of services. my little brain have thinked to up another firewall box iptables and put it with 1 nic in dmz to serve as new GW and another nic in the new public zone. afther i public the same services with this new FW in the new public zone. sure do not function... i have tryed but not. in this new configuration the service from server1 smtp ( that have always the old GW to goin out ) is functioning to the old public zone, but when i contact the server1 smtp ftom the new public zone, my server recive only SYN packet. but do not respond and the service smtp do not function. My problem is to find a solution for the migration. my little brain.. tel me to put another nic an the old FW and use this with 2 public zones and having only one PAT and NAT machine... is this the solution or there is a good solution ??? THANX in adv. GG