diff --git a/README.md b/README.md
index 6daca1b..e841aff 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,7 @@ These options can be configured by setting environment variables using `-e KEY="
 | - | - | - | - |
 | `PASSWORD` | - | `foobar123` | When set, requires a password when logging in to the Web UI. |
 | `WG_HOST` | - | `vpn.myserver.com` | The public hostname of your VPN server. |
+| `WG_DEVICE` | `eth0` | `ens6f0` | Ethernet device the wireguard traffic should be forwarded through. |
 | `WG_PORT` | `51820` | `12345` | The public UDP port of your VPN server. WireGuard will always listen on `51820` inside the Docker container. |
 | `WG_MTU` | `null` | `1420` | The MTU the clients will use. Server uses default WG MTU. |
 | `WG_PERSISTENT_KEEPALIVE` | `0` | `25` | Value in seconds to keep the "connection" open. If this value is 0, then connections won't be kept alive. |
diff --git a/src/config.js b/src/config.js
index 28c9fc5..30f9221 100644
--- a/src/config.js
+++ b/src/config.js
@@ -6,6 +6,7 @@ module.exports.RELEASE = release;
 module.exports.PORT = process.env.PORT || 51821;
 module.exports.PASSWORD = process.env.PASSWORD;
 module.exports.WG_PATH = process.env.WG_PATH || '/etc/wireguard/';
+module.exports.WG_DEVICE = process.env.WG_DEVICE || 'eth0';
 module.exports.WG_HOST = process.env.WG_HOST;
 module.exports.WG_PORT = process.env.WG_PORT || 51820;
 module.exports.WG_MTU = process.env.WG_MTU || null;
@@ -18,7 +19,7 @@ module.exports.WG_ALLOWED_IPS = process.env.WG_ALLOWED_IPS || '0.0.0.0/0, ::/0';
 
 module.exports.WG_PRE_UP = process.env.WG_PRE_UP || '';
 module.exports.WG_POST_UP = process.env.WG_POST_UP || `
-iptables -t nat -A POSTROUTING -s ${module.exports.WG_DEFAULT_ADDRESS.replace('x', '0')}/24 -o eth0 -j MASQUERADE;
+iptables -t nat -A POSTROUTING -s ${module.exports.WG_DEFAULT_ADDRESS.replace('x', '0')}/24 -o ${module.exports.WG_DEVICE} -j MASQUERADE;
 iptables -A INPUT -p udp -m udp --dport 51820 -j ACCEPT;
 iptables -A FORWARD -i wg0 -j ACCEPT;
 iptables -A FORWARD -o wg0 -j ACCEPT;