add wireguard

This commit is contained in:
Malin Freeborn 2022-04-19 13:52:12 +02:00
parent 9c81d240f2
commit 0dd308762e
Signed by: andonome
GPG Key ID: 52295D2377F4D70F

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networking/wireguard.md Normal file
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---
title: "wireguard"
tags: [ "Documentation", "Networking" ]
---
<!--
from
https://engineerworkshop.com/blog/how-to-set-up-wireguard-on-a-raspberry-pi/
-->
## 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