diff --git a/firewall b/firewall
index 5148e69..092e43b 100755
--- a/firewall
+++ b/firewall
@@ -141,7 +141,7 @@ port_knocking()
             iptables -A INPUT -i $WAN_INT -p tcp --dport $kport -m recent --set --name toc$i
         fi
     done
-    iptables -A INPUT -i $WAN_INT -p tcp --dport $port -m recent --rcheck --seconds 15 --name toc$i -m state --state NEW -j ACCEPT
+    iptables -A INPUT -i $WAN_INT -p tcp --dport $port -m recent --rcheck --seconds 6 --name toc$i -m state --state NEW -j ACCEPT
 }
 
 start()