Repaired puzzles (some had been saved in a solved state)

EduNetworkBuilder/Resources/Level1-MixedNetwork.enbx

@@ -129,7 +129,7 @@
         <interface>
           <nicname>management_interface0</nicname>
           <myip>
-            <ip>192.168.1.4</ip>
+            <ip>0.0.0.0</ip>
             <mask>255.255.255.0</mask>
             <gateway>0.0.0.0</gateway>
             <type>ip</type>
@@ -495,4 +495,4 @@
     </nettest>
     <tag>DHCP</tag>
   </Network>
-</EduNetworkBuilder>
+</EduNetworkBuilder>

EduNetworkBuilder/Resources/Level1_DuplicateMAC.enbx

@@ -280,6 +280,7 @@
           <hostname>pc0</hostname>
           <nicname>eth0</nicname>
         </myid>
+	<mac>1008b173aa5b</mac>
         <nictype>eth</nictype>
         <uniqueidentifier>122</uniqueidentifier>
         <usesdhcp>False</usesdhcp>
@@ -341,6 +342,7 @@
           <hostname>pc1</hostname>
           <nicname>eth0</nicname>
         </myid>
+	<mac>1008b173aa5b</mac>
         <nictype>eth</nictype>
         <uniqueidentifier>125</uniqueidentifier>
         <usesdhcp>False</usesdhcp>
@@ -480,4 +482,4 @@
     </nettest>
     <tag>MACAddress</tag>
   </Network>
-</EduNetworkBuilder>
+</EduNetworkBuilder>

EduNetworkBuilder/Resources/Level2_Blast_From_Past.enbx

@@ -883,7 +883,7 @@
       <isdns>False</isdns>
       <isdhcp>False</isdhcp>
       <gateway>
-        <ip>192.168.1.1</ip>
+        <ip>0.0.0.0</ip>
         <mask>0.0.0.0</mask>
         <gateway>0.0.0.0</gateway>
         <type>gw</type>
@@ -988,7 +988,7 @@
         <interface>
           <nicname>eth0</nicname>
           <myip>
-            <ip>192.168.2.5</ip>
+            <ip>192.168.3.5</ip>
             <mask>255.255.255.0</mask>
             <gateway>0.0.0.0</gateway>
             <type>ip</type>
@@ -1229,4 +1229,4 @@
     <tag>Gateway</tag>
     <tag>IPAddress</tag>
   </Network>
-</EduNetworkBuilder>
+</EduNetworkBuilder>