diff --git a/actions/networks b/actions/networks
index 1874c4c01..1501cc0b3 100755
--- a/actions/networks
+++ b/actions/networks
@@ -14,6 +14,21 @@ function get-interfaces {
     NO_OF_WIRELESS_IFACES=$(echo $WIRELESS_IFACES | wc -w)
 }
 
+function add-connection {
+    local connection_name="$1"
+    shift
+    local interface="$1"
+    shift
+    local remaining_arguments="$@"
+
+    already_exists=$(nmcli --terse --fields name,device con show | grep "$connection_name:$interface" || true)
+    if [ -n "$already_exists" ]; then
+        echo "Connection '$connection_name' already exists for device '$interface', not adding."
+    else
+        nmcli con add con-name "$connection_name" ifname "$interface" $remaining_arguments
+    fi
+}
+
 function activate-connection {
     connection_name="$1"
     nohup nmcli con up "$connection_name" &>/dev/null &
@@ -25,7 +40,7 @@ function configure-regular-interface {
     local connection_name="FreedomBox WAN"
 
     # Create n-m connection for a regular interface
-    nmcli con add con-name "$connection_name" ifname "$interface" type ethernet
+    add-connection "$connection_name" "$interface" type ethernet
     nmcli con modify "$connection_name" connection.autoconnect TRUE
     nmcli con modify "$connection_name" connection.zone "$zone"
     activate-connection "$connection_name"
@@ -38,7 +53,7 @@ function configure-shared-interface {
     local connection_name="FreedomBox LAN $interface"
 
     # Create n-m connection for eth1
-    nmcli con add con-name "$connection_name" ifname "$interface" type ethernet
+    add-connection "$connection_name" "$interface" type ethernet
     nmcli con modify "$connection_name" connection.autoconnect TRUE
     nmcli con modify "$connection_name" connection.zone internal
 
@@ -61,7 +76,7 @@ function configure-wireless-interface {
     local ssid="FreedomBox$interface"
     local secret="freedombox123"
 
-    nmcli con add con-name "$connection_name" ifname "$interface" type wifi ssid "$ssid"
+    add-connection "$connection_name" "$interface" type wifi ssid "$ssid"
     nmcli con modify "$connection_name" connection.autoconnect TRUE
     nmcli con modify "$connection_name" connection.zone internal
     nmcli con modify "$connection_name" ipv4.method shared