Hi,
I'm new to Epygi system.
I've configured my first epygi QX20 with 9 internal extensions, I need to configure the system so it accept external extension (IP or softphone).
the questions are:
1. what configuration I have to perform on the QX20 firewall?
2. what ports to forward on the internet router?
3. is there any additional requirement/configuration?

Thank you in advance