diff --git a/shadowsocks.sh b/shadowsocks.sh
index 4634b06..ee54d4b 100644
--- a/shadowsocks.sh
+++ b/shadowsocks.sh
@@ -187,7 +187,7 @@ function firewall_set(){
     if centosversion 6; then
         /etc/init.d/iptables status > /dev/null 2>&1
         if [ $? -eq 0 ]; then
-            iptables -L -n | grep '${shadowsocksport}' | grep 'ACCEPT' > /dev/null 2>&1
+            iptables -L -n | grep '${shadowsocksport}' > /dev/null 2>&1
             if [ $? -ne 0 ]; then
                 iptables -I INPUT -m state --state NEW -m tcp -p tcp --dport ${shadowsocksport} -j ACCEPT
                 iptables -I INPUT -m state --state NEW -m udp -p udp --dport ${shadowsocksport} -j ACCEPT