diff --git a/Configure-Shadowsocks-with-Supervisor.md b/Configure-Shadowsocks-with-Supervisor.md
index feace24..cd169c7 100644
--- a/Configure-Shadowsocks-with-Supervisor.md
+++ b/Configure-Shadowsocks-with-Supervisor.md
@@ -74,4 +74,8 @@ sudo chkconfig --add supervisord
 sudo chkconfig supervisord on
 service supervisor start
 supervisorctl reload
-```
\ No newline at end of file
+```
+
+Edit `/etc/sysconfig/iptables`, add
+
+    -A INPUT -m state --state NEW -m tcp -p tcp --dport your_server_port -j ACCEPT
\ No newline at end of file