To change the used port range after installing Axxon Next, do as follows:

1. Find the NTServiceOpts parameter in the section: HKEY_LOCAL_MACHINE\SOFTWARE\AxxonSoft\NGP. 
   
2. Under this parameter, find and change the values:
   1. --ngp-port-base (the beginning of the port range) and
   2. --ngp-port-span (number of ports).
3. Restart Server (see Shutting down a Server, Starting a Server).