Roon ARC openvpn solution

My home internet connection is only possible with 4G where i live.
So the ARC from roon 2.0 doesn’t work out of the box but i have an openvpn server so i have try to use it and it work perfectly.
So if you have an server, install openvpn, make it work and then only make a NAT rule to reach your core.

in my case my roon core have the vpn ip so the rule on ther server is:
iptables -A FORWARD -p tcp --dport 34585 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
iptables --table nat --append PREROUTING --in-interface enp4s0 --protocol tcp --destination-port 34585 --jump DNAT --to-destination

et voila…