Help for OpenVPN Server to set iptables

Hello All,
I need some help.
I am trying to setup a OpenVPN Server on my Raspberry Pi 2 having OSMC installation.

While setting up the firewall using IPtables, I am unable to get any results in the output of “iptables -L -v”.

Here 192.168.X.X is the the IP address of my Raspberry Pi.

osmc@osmc:~$ sudo iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j SNAT --to-source 192.168.X.X
osmc@osmc:~$ sudo iptables -L -v
Chain INPUT (policy ACCEPT 2138 packets, 256K bytes)
pkts bytes target prot opt in out source destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination

Chain OUTPUT (policy ACCEPT 1863 packets, 253K bytes)
pkts bytes target prot opt in out source destination
osmc@osmc:~$