[Serusers] Unreacheable destination problems

Hello! I'm using SER + rtpproxy, but altough the NAT problem seems to be solved, I get no audio ... analysing the traffic with ethereal, I realized that the traffic going from the proxy to the UAs never arrives (ICMP unreacheable destination)... I assume it is because the users have their ports blocked, is that correct? I changed the rtpproxy port range (PORT_MIN and PORT_MAX ) to lower ports, but still I got the same messages... Does anybody knows anything that can be done by me in terms of configurations of the rtpproxy or ser.cfg or whatever, given the fact that I don't have power to open the ports??..... Thanks, Amanda -- ------------------------------------------------------------------- Amanda Remes Mattiuz amattiuz(a)gmail.com