Iptables (port forwarding from vps openvpn server to vpn client)

I install openvpn server in Centos VPS. I can connect from my pfsense router. I forwrad rdp a port to my local pc, but can not forward rtp port. iptables -t nat -A PREROUTING -p tcp -m tcp --dport 3389 -j DNAT --to-destination 10.8.0.19 iptables -t nat -A PREROUTING -p udp --dport 10000:20000 -j DNAT --to 10.8.0.19 iptables -t filter -A FORWARD -p udp -d 10.8.0.19 --dport 10000:20000 -j ACCEPT