sudo iptables -t nat -A POSTROUTING -s 192.168.123.0/24 ! -d 192.168.123.0/24 -j MASQUERADE

sudo iptables -I FORWARD -d 192.168.123.0/24 -o virbr0 -m state --state RELATED,ESTABLISHED -j ACCEPT

sudo iptables -I FORWARD -s 192.168.123.0/24 -i virbr0 -j ACCEPT

sudo iptables -I FORWARD -s 192.168.122.0/24 -d 192.168.123.0/24 -j ACCEPT