Hi .*, scenario: 1) kamailio listening on 0.0.0.0:5060 UDP and TCP configured as SIP proxy 2) eth0 private interface, eth1 public interface 3) multiple IP address on eth1 4) firewall open on 5060 UCP/TCP only for 1 IP address x.x.x.x When from a client I try to register to the SIP proxy, packets are going to IP x.x.x.x but kamailio replies using a different source IP (typically first one configured on the interface) and not the one it received the request to. Is there a way to configure/workaround this? Thank you! -- mandi, Marco