diff --git a/common/lib/azure/storage/common/core/utility.rb b/common/lib/azure/storage/common/core/utility.rb
index f2c742b9a971e5c27c70b29ffa2f1fdc764c1395..e73f8d8bca25eb66ad14d44943ccc6062ea9680a 100644
--- a/common/lib/azure/storage/common/core/utility.rb
+++ b/common/lib/azure/storage/common/core/utility.rb
@@ -213,6 +213,12 @@ end
 
 # Code validate private/public IP acceptable ranges.
 class IPAddr
+  PRIVATE_RANGES = [
+    IPAddr.new('10.0.0.0/8'),
+    IPAddr.new('172.16.0.0/12'),
+    IPAddr.new('192.168.0.0/16')
+  ]
+
   def private?
     return false unless self.ipv4?
     PRIVATE_RANGES.each do |ipr|