I installed ubuntu 20.04.3 LTS on my old laptop. Next I followed the instructions of a youtube video " How to Setup Home assistant on Ubuntu (supervised) from scratch as virtual machine (KVM)".
I did his instructions :
iptables -I FORWARD -o virbr0 -d 192.168.122.231 -j ACCEPT
iptables -t nat -I PREROUTING -p tcp --dport 80 -j DNAT --to 192.168.122.231:8123
What did I wrong ?