sysctl -a | grep net.ipv4.ip_forward
sudo echo «net.ipv4.ip_forward = 1» > /etc/sysctl.conf
sudo echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/ip_forward
echo "net.ipv4.ip_forward = 1" > /etc/sysctl.conf
sysctl -w net.ipv4.ip_forward=1
iptables -t nat -A POSTROUTING -s 172.16.0.0/12 -j MASQUERADE
iptables -A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-ms