Add validation to prevent invalid ports, closes #1034

app/Exceptions/Service/Allocation/CidrOutOfRangeException.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Pterodactyl\Exceptions\Service\Allocation;
+
+use Pterodactyl\Exceptions\DisplayException;
+
+class CidrOutOfRangeException extends DisplayException
+{
+    /**
+     * CidrOutOfRangeException constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct(trans('exceptions.allocations.cidr_out_of_range'));
+    }
+}