diff --git a/plugin/shadowsocks/service.coffee b/plugin/shadowsocks/service.coffee
index 9af7df4..c67d2bf 100644
--- a/plugin/shadowsocks/service.coffee
+++ b/plugin/shadowsocks/service.coffee
@@ -43,7 +43,7 @@ queryIptablesInfo = (callback) ->
                   num: parseInt num
                   pkts: parseInt pkts
                   bytes: parseInt bytes
-                  port: parseInt
+                  port: parseInt port
             catch e
               continue
 
diff --git a/sample/rpvhost.config.coffee b/sample/rpvhost.config.coffee
new file mode 100644
index 0000000..e69de29
diff --git a/sample/shadowsocks.config.coffee b/sample/shadowsocks.config.coffee
index 24d4dba..90cf72a 100644
--- a/sample/shadowsocks.config.coffee
+++ b/sample/shadowsocks.config.coffee
@@ -60,5 +60,5 @@ module.exports =
 
     shadowsocks:
       price_bucket: 0.06
-      monitor_cycle: 5 * 60 * 1000
+      monitor_cycle: 60 * 1000
       billing_bucket: 100 * 1024 * 1024