echo 1 > /proc/sys/net/ipv4/ip_forward

iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 20080 -j DNAT --to 134.106.29.43:20080
 iptables -A FORWARD -p tcp -i eth1 -o eth0 -d 134.106.29.41 --dport 20080
iptables -t nat -A POSTROUTING -s 134.106.0.0/16 -o eth1 -j MASQUERADE