diff --git a/scripts/server-dhcp/find_hostname.sh b/scripts/server-dhcp/find_hostname.sh
index 9127b8b..59ed218 100644
--- a/scripts/server-dhcp/find_hostname.sh
+++ b/scripts/server-dhcp/find_hostname.sh
@@ -21,10 +21,32 @@ command_exists() {
     command -v "$1" &> /dev/null
 }
 
+# Détection du serveur DNS en prenant en compte dnsmasq et fallback sur resolv.conf
+get_dns_server() {
+    local dns_server=""
+    
+    if command_exists resolvectl; then
+        dns_server=$(resolvectl dns | awk '/^Global:/ {print $2; exit}')
+    fi
+
+    if [ -z "$dns_server" ] && command_exists dnsmasq; then
+        dns_server=$(ss -tulpn | grep dnsmasq | awk '{print $5}' | cut -d: -f1 | head -n1)
+    fi
+
+    if [ -z "$dns_server" ] && [ -f /etc/resolv.conf ]; then
+        dns_server=$(grep -m1 '^nameserver' /etc/resolv.conf | awk '{print $2}')
+    fi
+
+    echo "${dns_server:-9.9.9.9}"  # Utilisation d'un fallback 9.9.9.9 si aucun DNS trouvé
+}
+
+DNS_SERVER=$(get_dns_server)
+echo "🛜 Serveur DNS détecté : $DNS_SERVER"
+
 # 1️⃣ Test LLMNR (Link-Local Multicast Name Resolution)
 if command_exists resolvectl; then
     HOSTNAME_LLMNR=$(resolvectl query "$IP" 2>/dev/null | grep -oP '(?<=Name:\s).*' | head -n1)
-    if [ ! -z "$HOSTNAME_LLMNR" ]; then
+    if [ -n "$HOSTNAME_LLMNR" ]; then
         echo "✅ LLMNR: $HOSTNAME_LLMNR"
         exit 0
     fi
@@ -35,7 +57,7 @@ fi
 # 2️⃣ Test mDNS (Multicast DNS / Avahi)
 if command_exists avahi-resolve; then
     HOSTNAME_MDNS=$(avahi-resolve -a "$IP" 2>/dev/null | awk '{print $2}')
-    if [ ! -z "$HOSTNAME_MDNS" ]; then
+    if [ -n "$HOSTNAME_MDNS" ]; then
         echo "✅ mDNS (Avahi): $HOSTNAME_MDNS"
         exit 0
     fi
@@ -46,7 +68,7 @@ fi
 # 3️⃣ Vérification du cache ARP
 if command_exists arp; then
     HOSTNAME_ARP=$(arp -a | grep "$IP" | awk '{print $1}')
-    if [ ! -z "$HOSTNAME_ARP" ]; then
+    if [ -n "$HOSTNAME_ARP" ]; then
         echo "✅ ARP: $HOSTNAME_ARP"
         exit 0
     fi
@@ -57,7 +79,7 @@ fi
 # 4️⃣ Vérification via NetBIOS (Windows/Samba)
 if command_exists nmblookup; then
     HOSTNAME_NETBIOS=$(nmblookup -A "$IP" 2>/dev/null | grep -m1 '<00>' | awk '{print $1}')
-    if [ ! -z "$HOSTNAME_NETBIOS" ]; then
+    if [ -n "$HOSTNAME_NETBIOS" ]; then
         echo "✅ NetBIOS: $HOSTNAME_NETBIOS"
         exit 0
     fi
@@ -67,8 +89,8 @@ fi
 
 # 5️⃣ Scan réseau avec Nmap pour identifier l'hôte
 if command_exists nmap; then
-    HOSTNAME_NMAP=$(nmap -sP "$IP" 2>/dev/null | grep "Nmap scan report" | awk '{print $5}')
-    if [ ! -z "$HOSTNAME_NMAP" ]; then
+    HOSTNAME_NMAP=$(nmap --dns-servers "$DNS_SERVER" -sP "$IP" 2>/dev/null | grep "Nmap scan report" | awk '{print $5}')
+    if [ -n "$HOSTNAME_NMAP" ]; then
         echo "✅ Nmap: $HOSTNAME_NMAP"
         exit 0
     fi
diff --git a/scripts/server-dhcp/setup_dhcp.sh b/scripts/server-dhcp/setup_dhcp.sh
index b34955e..aa32a16 100644
--- a/scripts/server-dhcp/setup_dhcp.sh
+++ b/scripts/server-dhcp/setup_dhcp.sh
@@ -146,6 +146,16 @@ EOF
 # Redémarrer dnsmasq pour appliquer les modifications
 systemctl restart dnsmasq
 
+# Modifier /etc/resolv.conf
+echo 'nameserver 127.0.0.1' > /etc/resolv.conf
+echo "Configuration DNS mise à jour sur 127.0.0.1"
+# Redémarrer les services nécessaires
+echo "Redémarrage des services..."
+systemctl restart dnsmasq 2>/dev/null && echo "dnsmasq redémarré."
+systemctl restart systemd-resolved 2>/dev/null && echo "systemd-resolved redémarré."
+systemctl restart networking 2>/dev/null && echo "networking redémarré."
+systemctl restart NetworkManager 2>/dev/null && echo "NetworkManager redémarré."
+
 echo "Configuration terminée avec succès!"
 echo "Serveur DHCP/DNS fonctionnel sur $IP_SERVEUR"
 echo "Les clients recevront une IP entre $DHCP_START et $DHCP_END et seront associés au domaine $DOMAINE"