Hi,
You can edit the configuration file "config.lua", at the "acceptors" section, and change the port number you want to use for a given protocol. For example, the default ports for "inboundRtmp" are "1935" and "1936", which you can replace with other port numbers as required. You can also change the IP address to suit your requirements. IP address "0.0.0.0" is for any IP address, while "127.0.0.1" is for the localhost.
Cheers,
Don