diff --git a/src/main/java/fr/sixthemes/beans/NetConf.java b/src/main/java/fr/sixthemes/beans/NetConf.java
new file mode 100644
index 0000000..5ad470e
--- /dev/null
+++ b/src/main/java/fr/sixthemes/beans/NetConf.java
@@ -0,0 +1,17 @@
+package fr.sixthemes.beans;
+
+public class NetConf {
+    
+    protected String ipAddress;
+    protected String gateway;
+    protected String network;
+    protected String configuration;
+
+    public NetConf() {
+        this.ipAddress = "";
+        this.gateway = "";
+        this.network = "vmbr0";
+        this.configuration = "dhcp";
+    }
+
+}
diff --git a/src/main/java/fr/sixthemes/utils/Utils.java b/src/main/java/fr/sixthemes/utils/Utils.java
new file mode 100644
index 0000000..f7fce4a
--- /dev/null
+++ b/src/main/java/fr/sixthemes/utils/Utils.java
@@ -0,0 +1,18 @@
+package fr.sixthemes.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public abstract class Utils {
+    
+    public static boolean isValidIP(String ipAddress) {
+
+        Pattern p = Pattern.compile("");
+        Matcher m = p.matcher(ipAddress);
+        
+        if(!m.find()) return false;
+
+        return true;
+    }
+
+}