diff --git a/rule_sample/rule_assign_ip_address.js b/rule_sample/rule_assign_ip_address.js
new file mode 100644
index 0000000..e71c973
--- /dev/null
+++ b/rule_sample/rule_assign_ip_address.js
@@ -0,0 +1,13 @@
+//sample : assign 127.0.0.1 to www.taobao.com
+
+module.exports = {
+
+    replaceRequestOption : function(req,option){
+        if(option.hostname == "www.taobao.com"){
+        	option.hostname = "127.0.0.1";
+        }
+
+        return option;
+    }
+
+};
\ No newline at end of file