Hi My problem is that i need to change source address of packet when it's incoming to interface and then change destination address when packet it outgoing from interface. eg. DNAT in POSTROUTING and SNAT in PREROUTING. Any ideas/help how to do that kind of nat? I need this because i am using IIOP-protocol and it seems IIOP-packets includes IP-address of machine and it's not working when server is under NAT (using private-IP) so i need to do this NAT translation in our network also so our machine can communicate with IIOP-server. Terveisin/Regards, Pekka Panula, Net Servant Oy - A Sofor company pekka.panula@xxxxxxxx