http://billauer.co.il/ipmasq-html.html
IP Masquerading using iptables
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http://billauer.co.il/ipmasq-html.html
https://www.howtogeek.com/177621/the-beginners-guide-to-iptables-the-linux-firewall/
https://blog.ssdnodes.com/blog/tutorial-installing-openvpn-on-ubuntu-16-04/
To configure iptables look here:
https://www.digitalocean.com/community/tutorials/how-to-set-up-an-openvpn-server-on-ubuntu-16-04
https://linode.com/docs/networking/vpn/configure-openvpn-access-server-to-tunnel-traffic/
https://linode.com/docs/networking/vpn/install-openvpn-access-server-on-linux/
https://linode.com/docs/email/clients/install-roundcube-on-ubuntu/
http://wadihzaatar.com/?p=11
https://docs.microsoft.com/en-us/windows/wsl/install-win10
https://www.linode.com/docs/networking/vpn/install-openvpn-access-server-on-linux
sudo dhclient -r; sudo dhclient