diff --git a/EduNetworkBuilder/NB.cs b/EduNetworkBuilder/NB.cs
index d48bd68..66d7ef5 100644
--- a/EduNetworkBuilder/NB.cs
+++ b/EduNetworkBuilder/NB.cs
@@ -209,6 +209,14 @@ namespace EduNetworkBuilder
             IPAddr = ip;
             NicOnWhichItIsFound = thenic;
         }
+
+        public bool Equals(ArpEntry toCompare)
+        {
+            if (MACAddress != toCompare.MACAddress) return false;
+            if (IPAddr != toCompare.IPAddr) return false;
+            if (!NicOnWhichItIsFound.Equals(toCompare.NicOnWhichItIsFound)) return false;
+            return true;
+        }
     }
 
     [Serializable]
@@ -311,6 +319,14 @@ namespace EduNetworkBuilder
             }
         }
 
+        public bool Equals(FirewallRule toCompare)
+        {
+            if (Source != toCompare.Source) return false;
+            if (Destination != toCompare.Destination) return false;
+            if (Action != toCompare.Action) return false;
+            return true;
+        }
+
         public void Save(XmlWriter writer, string tag)
         {
             writer.WriteStartElement(tag);