make WG_DEFAULT_DNS optional, fixes #40

README.md

@@ -16,12 +16,16 @@ You have found the easiest way to install & manage WireGuard on any Linux host!
 
 * All-in-one: WireGuard + Web UI.
 * Easy installation, simple to use.
-* List, create, delete, enable & disable clients.
+* List, create, edit, delete, enable & disable clients.
 * Show a client's QR code.
 * Download a client's configuration file.
 * Statistics for which clients are connected.
 * Gravatar support.
 
+## Requirements
+
+* A host with a kernel that supports WireGuard (all modern kernels).
+
 ## Installation
 
 ### 1. Install Docker

src/config.js

@@ -6,5 +6,7 @@ module.exports.WG_PATH = process.env.WG_PATH || '/etc/wireguard/';
 module.exports.WG_HOST = process.env.WG_HOST;
 module.exports.WG_PORT = process.env.WG_PORT || 51820;
 module.exports.WG_DEFAULT_ADDRESS = process.env.WG_DEFAULT_ADDRESS || '10.8.0.x';
-module.exports.WG_DEFAULT_DNS = process.env.WG_DEFAULT_DNS || '1.1.1.1';
+module.exports.WG_DEFAULT_DNS = typeof process.env.WG_DEFAULT_DNS === 'string'
+  ? process.env.WG_DEFAULT_DNS
+  : '1.1.1.1';
 module.exports.WG_ALLOWED_IPS = process.env.WG_ALLOWED_IPS || '0.0.0.0/0, ::/0';

src/lib/WireGuard.js

@@ -51,6 +51,7 @@ module.exports = class WireGuard {
         }
 
         await this.__saveConfig(config);
+        await Util.exec('wg-quick down wg0').catch(() => {});
         await Util.exec('wg-quick up wg0');
         await Util.exec(`iptables -t nat -A POSTROUTING -s ${WG_DEFAULT_ADDRESS.replace('x', '0')}/24 -o eth0 -j MASQUERADE`);
         await Util.exec('iptables -A INPUT -p udp -m udp --dport 51820 -j ACCEPT');
@@ -174,7 +175,7 @@ AllowedIPs = ${client.address}/32`;
 [Interface]
 PrivateKey = ${client.privateKey}
 Address = ${client.address}/24
-DNS = ${WG_DEFAULT_DNS}
+${WG_DEFAULT_DNS ? `DNS = ${WG_DEFAULT_DNS}` : ''}
 
 [Peer]
 PublicKey = ${config.server.publicKey}