Different sip port

My DID provider using 5060 port.
But I want to use 5599 port.
But after that I can see incoming call from my DID provider not comes to my server.

Is there any way I can fix this in my astpp so I can use different port than 5060?

It just I can have better security in my server


Either provider needs to send traffic on the ip:port you are listening or you need to listen on the ip:port where your provider is sending traffic
Or have the firewall port forwarding rule, which may complete the flow