Warning: Your node should be accessible through built-in NAT hole punching capabilities. If that doesn't work, you can try the following.
For Raspberry PI nodes, the OpenVPN service port can be set directly under Settings page in the WebUI (http://[node_ip]:4449). Once that is done, hit save and it will be automatically adjusted in the configuration file.
Alternatively, you can modify the
/etc/default/mysterium-node configuration file and change the service options there.
If you run a command line node, use the
service command options.
For example, if you'd like your node to run on port
1194 use the flag
In the end it would look like this:
IMPORTANT: Don't forget to set selected port forwarding on your router.