Duo certificate proxy 1024-65535 port


We installed certificate proxy server in our environment. But we don’t want to open long range 1024-65535 port from internal domain computers to server.

There is one method in CA server that instead of using 1024-65535 port just one port for example 4000, 5000 etc.

Question is can we use one port instead of 1024-65535 on certificate proxy server if possible how to do it.