lk/wireguard.md at 0587e9914a988290f86dbe9e8358e3fdd3683419

input examples are now given as

```bash
input $ARG1
```

While outputs use md's '> ' sign as a quote.

2023-06-17 21:28:20 +02:00

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title

On Server

Install wireguard-tools on the server.

sudo -i

cd /etc/wireguard

umask 077

wg genkey | tee server_private_key | wg pubkey > server_public_key

wg genkey | tee client_private_key | wg pubkey > client_public_key

    echo "
    [Interface]
    Address = 10.0.0.1/24
    SaveConfig = true
    PrivateKey = $(cat server_private_key)
    ListenPort = 51900
    
    PostUp = iptables -A FORWARD -i %i -j ACCEPT; iptables -A FORWARD -o %i -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
    PostDown = iptables -D FORWARD -i %i -j ACCEPT; iptables -D FORWARD -o %i -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE
    
    [Peer]
    PublicKey = $(cat client_public_key)
    AllowedIPs = 10.0.0.2/32
    " > /etc/wireguard/wg0.conf

echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/wg.conf

systemctl enable --now wg-quiqck@wg0

chown -R root:root /etc/wireguard/

chmod -R og-rwx /etc/wireguard/\*

Forward traffic from port 51900 to the server.

Client

Be root.

Install wireguard-tools on the client.

Copy the client private key and server public key to the server (or just fill in the variables).

server_ip=your server's public ip

echo "
[Interface]
Address = 10.0.0.2/32
PrivateKey = $(cat client_private_key)
DNS = 9.9.9.9

[Peer]
PublicKey = $(cat server_public_key)
Endpoint = $(echo $server_ip:51900)
AllowedIPs = 0.0.0.0/0, ::/0
" > /etc/wireguard/wg0-client.conf

wg-quick up wg0-client

Extras

Multiple Peers

Add multiple peers by copying the [peer] section (they each get called peer).

Make a QR Code for Mobile Users

Make a standard client configuration, then:

qrencode -t ansiutf8 < /etc/wireguard/mobile_user.conf

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