[Serusers] Critical setup ??? is this scenario possible using SER???

Hi, Is this scenario possible? Asterisk box (behind NAT) ----> SER (doing only routing using prefix, using public IP and without NAT helper and Meidaproxy) ------> multiple Asterisk (these are on public ip) Here my one asterisk box is behind Nat. For outbound calls, this asterisk box will communicate to SER (public ip), which will route its call to another asterisk box (this one is in public IP) depending on domain or prefix. Ser will not use any rtp proxy or media proxy. It will only route calls between asterisks, from asterisks behind NAT to public asterisks. Is this scenario possible?? If, then what kind of configuration I have to do in ser. Thank you, Shaikat