Setting up openvpn as non default

# start vpn in background with automatic routing disabled
sudo openvpn --config /etc/openvpn/CA\ Vancouver.ovpn --daemon --pull-filter ignore redirect-gateway

# run this then change the values below
sudo nano /etc/sysctl.conf

net.ipv4.ip_forward = 1             # Enable IP Forwarding
net.ipv4.conf.default.rp_filter = 0 # Disable Source Route Path Filtering
net.ipv4.conf.all.rp_filter = 0     # Disable Source Route Path Filtering on All interfaces

# execute this to reload config
sudo sysctl -p /etc/sysctl.conf

# Set interface values
INTERNET_IFACE=enp2s0
VPN_IFACE=eth0

# Enable masquerading
sudo iptables -A FORWARD -i "$INTERNET_IFACE" -j ACCEPT
sudo iptables -t nat -A POSTROUTING -o "$INTERNET_IFACE" -j MASQUERADE

# Forward the vpn to internet
sudo iptables -A FORWARD -i "$INTERNET_IFACE" -o "$VPN_IFACE" -j ACCEPT
sudo iptables -A FORWARD -i "$VPN_IFACE" -o "$INTERNET_IFACE" -m state --state RELATED,ESTABLISHED -j ACCEPT