Port-forwarding and firewall configuration in Debian-based AppVM

Hello everyone. I need your help for firewall configuration in a debian appmv. I want to run a node and I am confused in the way I have to do it. First of all I have to open port 3414/tcp in router settings and enable port forward. Should I just configure the appvm firewall rules or I need to follow the steps in qubes firewall guide? Thank you