diff --git a/src/config.js b/src/config.js
index fa7c49c7..45974174 100644
--- a/src/config.js
+++ b/src/config.js
@@ -33,7 +33,7 @@ module.exports.WG_PRE_UP = process.env.WG_PRE_UP || '';
 module.exports.WG_POST_UP = process.env.WG_POST_UP;
 if (!process.env.WG_POST_UP) {
   module.exports.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;`;