Wireguard on Raspbian

1) sudo su

2) apt install raspberrypi-kernel-headers libelf-dev libmnl-dev build-essential git

3) git clone https://git.zx2c4.com/wireguard-linux-compat

4) git clone https://git.zx2c4.com/wireguard-tools

Compile and install the module

5) make -C wireguard-linux-compat/src -j$(nproc)

6) sudo make -C wireguard-linux-compat/src install

Compile and install the wg(8) tool

7) make -C wireguard-tools/src -j$(nproc)

8) sudo make -C wireguard-tools/src install

9) nano /etc/sysctl.conf

10) uncomment this line: net.ipv4.ip_forward=1

11) reboot