Os dois comandos seguintes fazem o truque:
# Allow traffic initiated from VPN to access LAN
iptables -I FORWARD -i tun0 -o eth0 \
-s 10.1.0.0/24 -d 192.168.0.0/24 \
-m conntrack --ctstate NEW -j ACCEPT
# Allow established traffic to pass back and forth
iptables -I FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
Persistir em iptables
config: link