diff --git a/shadowsocks-libev/files/shadowsocks-libev.init b/shadowsocks-libev/files/shadowsocks-libev.init
index 99f6cf764..8cfd999a2 100644
--- a/shadowsocks-libev/files/shadowsocks-libev.init
+++ b/shadowsocks-libev/files/shadowsocks-libev.init
@@ -339,7 +339,7 @@ rules_up() {
 		config_foreach ss_rules_restart "$cfgtype" "$cfgtype"
 	done
 	ss_rules
-	ss_rules6
+	[ "$(sysctl -n net.ipv6.conf.all.disable_ipv6 | tr -d '\n')" = "1" ] || ss_rules6
 	[ -f /etc/init.d/omr-bypass ] && /etc/init.d/omr-bypass reload
 }
 
@@ -347,9 +347,9 @@ rules_down() {
 	rules_exist || return 0
 	logger -t "Shadowsocks" "Rules DOWN"
 	local bin="$ss_bindir/ss-rules"
-	[ -x "$bin" ] && "$bin" -f
+	[ -x "$bin" ] && "$bin" -f >/dev/null 2>&1
 	local bin6="$ss_bindir/ss-rules6"
-	[ -x "$bin6" ] && "$bin6" -f
+	[ -x "$bin6" ] && "$bin6" -f >/dev/null 2>&1
 }