diff --git a/ManagerService/Services/DeviceDatabaseService.cs b/ManagerService/Services/DeviceDatabaseService.cs
index 2c049ac..f35d7fd 100644
--- a/ManagerService/Services/DeviceDatabaseService.cs
+++ b/ManagerService/Services/DeviceDatabaseService.cs
@@ -34,6 +34,16 @@ namespace Manager.Services
             return _Devices.Find<Device>(d => d.Id == id).FirstOrDefault();
         }
 
+        public bool IsExistIpWLAN(string ip)
+        {
+            return _Devices.Find<Device>(d => d.IpAddressWLAN == ip).FirstOrDefault() != null ? true : false;
+        }
+
+        public bool IsExistIpETH(string ip)
+        {
+            return _Devices.Find<Device>(d => d.IpAddressETH == ip).FirstOrDefault() != null ? true : false;
+        }
+
         public bool IsExist(string id)
         {
             return _Devices.Find<Device>(d => d.Id == id).FirstOrDefault() != null ? true : false;