Hi, 
  Here are same problems in my configuration of kamailio server.
  I have two kamailio server (both have a NAT IP and a lan IP), and I use DNS to keep loadbalance.When sending message to another account , if NAT IP which is returned by DNS, is not the same as receiver account, kamailio server sends 404 not found error.
  I really have no idea how to set the configuration when using  DNS loadbalance to return two NAT IP. 
  Thank you , I'm looking forward from you!
                                                                                                                                      Sincerely yours
                                                                                                                                      Ada WU

mlwu@south-star.com.cn