Added gentoo docs article

content/docs/gentoo/wireguard.md

@@ -0,0 +1,57 @@
+---
+title: Wireguard
+description: How to configure a wireguard endpoint on Gentoo
+---
+
+## Introduction
+
+This article explains how to configure wireguard on Gentoo.
+
+## Configuration example
+
+Here is a `/etc/wireguard/wg0.conf` configuration example to create a tunnel listening on udp port 342 and a remote peers :
+```cfg
+[Interface]
+PrivateKey = MzrfXLmSfTaCpkJWKwNlCSD20eDq7fo18aJ3Dl1D0gA=
+ListenPort = 342
+Address = 10.1.2.7/24
+
+[Peer]
+PublicKey = R4A01RXXqRJSY9TiKQrZGR85HsFNSXxhRKKEu/bEdTQ=
+Endpoint = 168.119.114.183:342
+AllowedIPs = 10.1.2.9/32
+PersistentKeepalive = 60
+```
+
+Your private key goes on the first line as argument to `wgkey`, the other keys are public keys for each peer. In this example I setup a client that can be hidden behind nat therefore I configure a `PersistentKeepalive`. If your host has a public IP this line is not needed.
+
+To activate the interface configuration, use :
+```sh
+cd /etc/init.d
+ln -s ln -s wg-quick wg-quick.wg0
+rc-update add wg-quick.wg0 default
+/etc/init.d/wg-quick.wg0 start
+```
+
+## Administration
+
+Private keys can be generated with the following command :
+{{< highlight sh >}}
+openssl rand -base64 32
+{{< /highlight >}}
+
+The tunnel can be managed with the `wg` command:
+```sh
+root@hurricane:~# wg
+interface: wg0
+  public key: 7fbr/yumFeTzXwxIHnEs462JLFToUyJ7yCOdeDFmP20=
+  private key: (hidden)
+  listening port: 342
+
+peer: R4A01RXXqRJSY9TiKQrZGR85HsFNSXxhRKKEu/bEdTQ=
+  endpoint: 168.119.114.183:342
+  allowed ips: 10.1.2.9/32
+  latest handshake: 57 seconds ago
+  transfer: 1003.48 KiB received, 185.89 KiB sent
+  persistent keepalive: every 1 minute
+```