Other than what the NaturalONE install process will define automatically as locally used ports, the only client device port you should have to worry about defining a Windows port policy for to allow an incoming connection to should be the incoming connection used by the Debug Attach Server you will run on your local client so that your mainframe Debug session can connect to your local client’s Debug Attach Server port. You define which port number the Debug Attach Server connection will use in NaturalONE.
Texas Comptroller of Public Accounts
z/OS 2.4 mainframe, DB2 V12
NCI834/CICS TS 5.4
EXX10.5(Broker Kernel in RedHat Linux 7.5 environment)
EXX10.3(ACI & RPC Servers in MF environment)