VPN server setup

References:
https://askubuntu.com/questions/119534/easiest-way-to-setup-ubuntu-as-a-vpn-server
https://pimylifeup.com/raspberry-pi-vpn-server/

OpenVPN
https://www.digitalocean.com/community/tutorials/how-to-set-up-an-openvpn-server-on-ubuntu-16-04
In server conf, use
dev tap  and server-bridge 192.168.0.104 255.255.255.0 192.168.0.201 192.168.0.210 if you are doing ethernet-bridging, use dev tun, server 10.8.0.0 255.255.255.0 for  IP tunneling
In client conf, use
dev tap if you are doing ethernet-bridging, use dev tun for

Port forwarding from home router to a server in your private network
NoIP for dynamic DNS. Integration with common switches

Set up proxy server with squid


Ubuntu uses UFW to manage the firewall
https://help.ubuntu.com/community/UFW

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