I have setup a very basic VPN setup while traveling to prevent tracking & annoying ads on unsecured public WiFi networks. It all runs on a tiny t2.nano costing less than $5/month.
All this runs on a single
t2.nano AWS instance running in the nearest region running Ubuntu 19.04.
Pi-hole (DNS + AdBlocker)
A simply trusty old cURL to bash 🙇♂️
curl -sSL https://install.pi-hole.net | bash
Setting this up is quite easy after you get the hang of the key generation commands.
add-apt-repository ppa:wireguard/wireguard apt-get update apt-get install wireguard cd /etc/wireguard wg genkey | tee privatekey | wg pubkey > publickey
I then muck around inside vim to create
/etc/wireguard/wg0.conf which contains something like:
[Interface] Address = 192.168.13.1 PrivateKey = [aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g/dj1vYXZNdFVXREJUTQ==] change me ListenPort = 51820 PostUp = sysctl net.ipv4.ip_forward=1; iptables -A FORWARD -i %i -j ACCEPT; iptables -t nat -A POSTROUTING -s 192.168.13.0/24 -o ens5 -j MASQUERADE; /usr/local/bin/pihole restartdns PostDown = iptables -t nat -D POSTROUTING -s 192.168.13.0/24 -o ens5 -j MASQUERADE [Peer] PublicKey = [aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g/dj1vYXZNdFVXREJUTQ==] sup AllowedIPs = 192.168.13.2/32 ... etc etc
The post-up/stop commands ensure traffic is forwarded out of the machine's IP address. You might need to replace
ens5 to your default route's interface. Pihole is restarted to make sure it's listening on the wg0 interface for clients to use it as the DNS server.
Sample client config file
[Interface] PrivateKey = aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g/dj1vYXZNdFVXREJUTQ== Address = 192.168.13.2/32 DNS = 192.168.13.1 [Peer] # the server PublicKey = aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g/dj1vYXZNdFVXREJUTQ== AllowedIPs = 0.0.0.0/0 # The server IP/udp port wg listens on Endpoint = 184.108.40.206:51820 PersistentKeepalive = 25