I have installed kamailio as a ims server in openstack and enabled WITH_NAT and rtpproxy . I have installed pcscf, icscf, scscf and hss in four different ubuntu instances .

server - kamailio 5.3.3.

When i make a call using zoiper client from external network , call is becoming a missed call without giving ACK and BYE.

Openstack -

pcscf - 10.40.10.3 (floating ip - 10.45.4.22)

icscf - 10.40.10.12

scscf - 10.40.10.5

hss - 10.40.10.31

zoiper1 - 10.0.2.15

zoiper2 - 10.0.2.15

kindly help me in this regard.

when i installed without using NAT and rtpproxy, the call went well. Since currently i am using Opensatck , it is my prerequisite to use zoiper client externally .so for me it is mandate to enable NAT and rtpproxy.

Help me please!!!