[SR-Users] Setup IMS core Network When Network behind nat

[Mojtaba]

Hello, I am working on IMS core network. In this network we have these
node with private IP:
P-CSCF: 192.168.100.101(pcscf.kamailio-ims.test)
I-CSCF: 192.168.100.102(icscf.kamailio-ims.test)
S-CSCF: 192.168.100.103(scscf.kamailio-ims.test)
HSS: 192.168.100.200(hss.kamailio-ims.test)
I have two default users (bob and alice) and all things right great.
Now i want use this network with one public IP behind nat. Let me know
What should i do?
In one way i could use SEMS-SBC and set public IP on it, How should i
config sems-sbc to work correctly?
Thanks.With Regads.
M.ES.S