Point-to-point setup
https://www.wireguard.com/quickstart/
https://wiki.archlinux.org/index.php/WireGuard
## INSTALL
# Install wireguard
apt install wireguard
## KEYS
# Create storage
cd /etc/wireguard
mkdir keys && chmod go-rwx ./keys && cd keys
# Generate private key
(umask 0077; wg genkey > peer_A.key)
# Derive public key
wg pubkey < peer_A.key > peer_A.pub
# Optionnal - Generate Pre-Shared Key ; 1 for each peer pair
wg genpsk > peer_A-peer_B.psk
## NETWORKING
# Create interface
ip link add dev wg0 type wireguard
# Assign address and mask
ip address add dev wg0 192.168.2.1/24
# Set port
wg set wg0 listen-port 51871
wg set wg0 listen-port 51871 private-key ./peer_A.key