OpenVPN: push all LAN traffic through an OpenVPN client to the other side

1. Local variables for this post, adjust to fit your setup:
1. OpenVPN client server IP
1. 192.168.1.200
2. Remote network
1. 172.16.1.0/24

1. Add this to the client server that is using OpenVPN to connect to the remote server:
1. sudo iptables -A POSTROUTING -o tun0 -j MASQUERADE
2. as root user, do
1. echo 1 > /proc/sys/net/ipv4/ip_forward
2. Add this to your local computer 
1. Linux: 
1. ip route add 172.16.1.0/24 via 192.168.1.200
2. Mac:
1. route -n add 172.16.1.0/24 192.168.1.200

Now, you should be able to ping from your local computer, through the client machine, and to a server in the remote network. Once that works, try ssh.

NOTE: take a look at /etc/sysctl.conf if you want the ip_forward to last through reboots of client server: net.ipv4.ip_forward=1