diff --git a/build_nat_network.sh b/build_nat_network.sh
index 25d45e1..26c45df 100644
--- a/build_nat_network.sh
+++ b/build_nat_network.sh
@@ -55,10 +55,12 @@ iface vmbr1 inet static
 EOF
 fi
 
+# 加载iptables并设置回源
 if ! command -v iptables &> /dev/null; then
     green "iptables 未安装，正在安装..."
     apt-get install -y iptables
 fi
+iptables -t nat -A POSTROUTING -j MASQUERADE
 
 # 重启配置
 service networking restart