If you have multiple machines setup, you might want to disable upnp as you can miss out on block validations. It’s also a waste of bandwidth.
Before you disable upnp bear in mind that you’ll have to restart all chia processes in order for the setting to take effect, so if you have a harvester on or the GUI open, they’ll have to be closed first.
To disable upnp via the command line, run the following command:
chia configure --enable-upnp false