Hi All, This question might have addressed, but not able to find correct answer in archives and I have spent enough time, so posting here. I want to load balance between 2-3 kamailio servers based on DNS, I don't need to worry about media just trying IM with SIP messages. Configured two servers with same domain alias(example.com <http://example.com>) and able to send messages between users registered to one Node. But when i tried to send messages between users registered to two different servers, messages are not getting routed properly. When Server A tried to reach user registered to Server:B directly, firewall is not allowing. Tried to route message to correct proxy based on the socket details in Loctaion table, but not able to read socket details from location table, I am getting always NULL. I am sure,I am doing something wrong with configuration, but not sure and also not able to find example for this on Kamailio website. I am attaching my configuration, appreciate any help. Thanks, VG _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users