diff --git a/server.py b/server.py
index 6c09653..04dd688 100644
--- a/server.py
+++ b/server.py
@@ -598,6 +598,10 @@ def page_net_del(nid):
     if Rete.query.count() <= 1:
         return render_template("error.htm", error="Non puoi cancellare l'ultima rete rimasta!")
     rete = Rete.query.get_or_404(nid)
+    defaultrete = Rete.query.filter_by(network_ip="0.0.0.0").first()
+    dispositivi = Dispositivo.query.filter_by(nid=rete.nid).all()
+    for dispositivo in dispositivi:
+        dispositivo.nid = defaultrete.nid
     db.session.delete(rete)
     db.session.commit()
     return redirect(url_for('page_net_list'))
diff --git a/templates/net/details.htm b/templates/net/details.htm
index d539edf..7869f20 100644
--- a/templates/net/details.htm
+++ b/templates/net/details.htm
@@ -42,7 +42,12 @@
     </ul>
     <a href="/net_show/{{ net.nid }}">
         <button type="button" class="btn btn-primary">
-              <span class="glyphicon glyphicon-pencil" aria-hidden="true"></span> Modifica
+              <span class="glyphicon glyphicon-pencil"></span> Modifica
+        </button>
+    </a>
+    <a href="/net_del/{{ net.nid }}">
+        <button type="button" class="btn btn-danger">
+              <span class="glyphicon glyphicon-remove"></span> Elimina
         </button>
     </a>
 {% endblock %}
\ No newline at end of file
diff --git a/templates/net/list.htm b/templates/net/list.htm
index ee241f4..2b651a7 100644
--- a/templates/net/list.htm
+++ b/templates/net/list.htm
@@ -4,6 +4,9 @@
     <h1>
         Reti esistenti
     </h1>
+    <div class="alert alert-info">
+        La rete con IP 0.0.0.0 sarà usata come rete di default durante l'eliminazione di altre reti con dispositivi assegnati. Cancellarla potrebbe avere effetti indesiderati.
+    </div>
     <a class="btn btn-success" href="/net_add"><span class="glyphicon glyphicon-plus"></span> Aggiungi</a>
     <table class="table table-hover">
         <thead>
@@ -19,7 +22,7 @@
                 <td>{{ rete.nome }}</td>
                 <td>{{ rete.network_ip }}/{{ rete.subnet }}</td>
                 <td><a href="/net_details/{{ rete.nid }}"><span class="glyphicon glyphicon-list-alt"></span></a></td>
-                <td>{% if not rete.network_ip == "0.0.0.0" %}<a href="/net_del/{{ rete.nid }}"><span class="glyphicon glyphicon-remove"></span></a>{% endif %}</td>
+                <td>{% if reti|length > 2 %}<a href="/net_del/{{ rete.nid }}"><span class="glyphicon glyphicon-remove"></span></a>{% endif %}</td>
             {% endfor %}
         </tr>
     </table>