diff --git a/wireguard/deploy-wg-clients.sh b/wireguard/deploy-wg-clients.sh
old mode 100644
new mode 100755
index 42de6ac..8a9d1ed
--- a/wireguard/deploy-wg-clients.sh
+++ b/wireguard/deploy-wg-clients.sh
@@ -1,5 +1,12 @@
 #!/bin/bash
 
+#re='^[0-9]{1,3}$'
+if ! [[ $IP =~ ^[0-9]{1,3}$ ]] ; then
+   echo "error: Please set IP variable (with IP=1-254. See https://phpipam.altinea.fr" >&2; exit 1
+fi
+
+exit 1;
+
 mkdir -p /etc/wireguard/keys
 umask 077 && wg genkey > /etc/wireguard/keys/private.key && wg pubkey < /etc/wireguard/keys/private.key > /etc/wireguard/keys/public.key && umask 0022
 
@@ -21,3 +28,4 @@ systemctl enable wg-quick@wg0.service && systemctl daemon-reload && systemctl st
 
 echo -n "Clé publique : "
 cat /etc/wireguard/keys/public.key
+exit 0;
\ No newline at end of file