I've noticed this in both kamailio 3.1.5 and 3.2.x. I've configured to receive on udp 9090 port. This sip message will be forwarded to a asterisk box listening on 5060 port. Now what i'm trying to achieve is , When kamailio will receive the sip message on udp 9090 port it will forward the message to asterisk using source port 5060, not 9090. How can i configure this?Thanks in advance. With Best Regards Ariful Hossain Tuhin email: 1. etothepowerpi(a)gmail.com 2. etothepowerpi(a)hotmail.com 3.etothepowerpi(a)yahoo.com skype: freeburn1986