[please ignore my previous message] Hi everyone, When I try to change the port from 5060 to other value (e.g. 1234), after restarting SER, the gateway (sipura 2000) fails to register even I change the "SIP port" to 1234. I use serctl ps to view the server process, only port 1234 is used for listening. I use ethereal to trace the packets, when the client sends the REQUEST, my SER server did not reply. Only 5060 works successfully. Do you have any ideas? Thomas