diff --git a/network.sh b/network.sh
index f4ebd5d..f061ff8 100644
--- a/network.sh
+++ b/network.sh
@@ -4,29 +4,39 @@
 interface=$(lshw -C network | awk '/logical name:/{print $3}' | head -1)
 ip=$(curl -s ipv4.ip.sb)/24
 gateway=$(ip route | awk '/default/ {print $3}')
-cat << EOF | sudo tee -a /etc/network/interfaces
-auto vmbr0
-iface vmbr0 inet static
-    address $ip
-    gateway $gateway
-    bridge_ports $interface
-    bridge_stp off
-    bridge_fd 0
-EOF
+if grep -q "vmbr0" /etc/network/interfaces; then
+    echo "vmbr0 already exists in /etc/network/interfaces"
+else
+    # Add the vmbr0 configuration block
+    cat << EOF | sudo tee -a /etc/network/interfaces
+    auto vmbr0
+    iface vmbr0 inet static
+        address $ip
+        gateway $gateway
+        bridge_ports $interface
+        bridge_stp off
+        bridge_fd 0
+    EOF
+fi
 
-cat << EOF | sudo tee -a /etc/network/interfaces
-auto vmbr1
-iface vmbr1 inet static
-    address 172.16.1.1
-    netmask 255.255.255.0
-    bridge_ports none
-    bridge_stp off
-    bridge_fd 0
-    post-up echo 1 > /proc/sys/net/ipv4/ip_forward
-    post-up echo 1 > /proc/sys/net/ipv4/conf/vmbr1/proxy_arp
-    post-up iptables -t nat -A POSTROUTING -s '172.16.1.0/24' -o vmbr0 -j MASQUERADE
-    post-down iptables -t nat -D POSTROUTING -s '172.16.1.0/24' -o vmbr0 -j MASQUERADE
-EOF
+if grep -q "vmbr1" /etc/network/interfaces; then
+    echo "vmbr1 already exists in /etc/network/interfaces"
+else
+    # Add the vmbr1 configuration block
+    cat << EOF | sudo tee -a /etc/network/interfaces
+    auto vmbr1
+    iface vmbr1 inet static
+        address 172.16.1.1
+        netmask 255.255.255.0
+        bridge_ports none
+        bridge_stp off
+        bridge_fd 0
+        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
+        post-up echo 1 > /proc/sys/net/ipv4/conf/vmbr1/proxy_arp
+        post-up iptables -t nat -A POSTROUTING -s '172.16.1.0/24' -o vmbr0 -j MASQUERADE
+        post-down iptables -t nat -D POSTROUTING -s '172.16.1.0/24' -o vmbr0 -j MASQUERADE
+    EOF
+fi
 
 service networking restart
 systemctl restart networking.service