diff --git a/omr-tracker/files/bin/omr-tracker-server b/omr-tracker/files/bin/omr-tracker-server
index d83ccfc64..f518aff37 100755
--- a/omr-tracker/files/bin/omr-tracker-server
+++ b/omr-tracker/files/bin/omr-tracker-server
@@ -249,7 +249,7 @@ _check_master() {
 				[ -n "$script_alert_up" ] && eval $script_alert_up
 				count=$((count+1))
 			else
-				[ -z "$(logread | tail -n 10 | grep "Master server ${name} down" | grep $ip)" ] && logger -t "OMR-Tracker-Server" "Master server ${name} down ($ip)"
+				[ -n "$ip" ] && [ -z "$(logread | tail -n 10 | grep "Master server ${name} down" | grep "$ip")" ] && logger -t "OMR-Tracker-Server" "Master server ${name} down ($ip)"
 				OMR_TRACKER_STATUS_MSG="No answer to ping and API check"
 				servername=""
 				config_load shadowsocks-libev
@@ -428,7 +428,7 @@ _check_backup() {
 				[ -n "$script_alert_up" ] && eval $script_alert_up
 				count=$((count+1))
 			else
-				[ -z "$(logread | tail -n 10 | grep "Backup server ${name} down" | grep $ip)" ] && logger -t "OMR-Tracker-Server" "Backup server ${name} down ($ip)"
+				[ -n "$ip" ] && [ -z "$(logread | tail -n 10 | grep "Backup server ${name} down" | grep "$ip")" ] && logger -t "OMR-Tracker-Server" "Backup server ${name} down ($ip)"
 				uci -q batch <<-EOF >/dev/null
 					set openmptcprouter.${name}.current='0'
 					commit openmptcprouter
diff --git a/omr-tracker/files/bin/omr-tracker-ss b/omr-tracker/files/bin/omr-tracker-ss
index 7b5697cc5..ec0b70be1 100755
--- a/omr-tracker/files/bin/omr-tracker-ss
+++ b/omr-tracker/files/bin/omr-tracker-ss
@@ -79,6 +79,7 @@ interval=${OMR_TRACKER_INTERVAL:-10}
 retry=${OMR_TRACKER_TRIES:-4}
 proxy=${OMR_TRACKER_PROXY:-127.0.0.1:1111}
 hosts=${OMR_TRACKER_HOSTS:-1.1.1.1 1.0.0.1}
+hosts6=${OMR_TRACKER_HOSTS6}
 wait_test=${OMR_TRACKER_WAIT_TEST:-0}
 server=${OMR_TRACKER_SERVER:-sss0}
 type=${OMR_TRACKER_SS_TYPE:-libev}
@@ -101,7 +102,7 @@ while true; do
 		nocontact=""
 		[ "${last}" -ge "${retry}" ] || [ "$(uci -q get openmptcprouter.omr.ss_${server})" = "" ] && {
 			_log "Shadowsocks ${server} is up (can contact via http ${host})"
-			OMR_TRACKER_STATUS_MSG="Shadowsocks ${server} is up (can contact via http ${host})"
+			OMR_TRACKER_STATUS_MSG="Shadowsocks $type ${server} is up (can contact via http ${host})"
 			uci -q set openmptcprouter.omr.ss_${server}="up"
 			uci -q commit openmptcprouter.omr
 			mail_alert="$(uci -q get omr-tracker.proxy.mail_alert)"
@@ -141,7 +142,7 @@ while true; do
 		[ "${last}" -ge "${retry}" ] && {
 			if [ "$OMR_TRACKER_PREV_STATUS" != "ERROR" ] && [ -n "$($IPTABLES -w -t nat -L -n 2>/dev/null | grep ssr)" ] || [ -n "$(nft list ruleset 2>/dev/null | grep ss_r)" ] || [ -n "$(nft list ruleset 2>/dev/null | grep ssr_r)" ]; then
 				_log "Shadowsocks ${server} is down (can't contact via http ${nocontact})"
-				OMR_TRACKER_STATUS_MSG="Shadowsocks ${server} is down (can't contact via http ${nocontact})"
+				OMR_TRACKER_STATUS_MSG="Shadowsocks $type ${server} is down (can't contact via http ${nocontact})"
 				uci -q set openmptcprouter.omr.ss_${server}="down"
 				uci -q commit openmptcprouter.omr
 				if [ "$(uci show openmptcprouter.omr | grep ss_ | grep up)" = "" ]; then
diff --git a/shadowsocks-rust/files/shadowsocks-rust.init-nft b/shadowsocks-rust/files/shadowsocks-rust.init-nft
index 8b51253b9..f83311968 100755
--- a/shadowsocks-rust/files/shadowsocks-rust.init-nft
+++ b/shadowsocks-rust/files/shadowsocks-rust.init-nft
@@ -166,6 +166,7 @@ ss_rules_nft_gen() {
 		max_ss_redir_ports="0"
 		config_load shadowsocks-rust
 		config_foreach ss_redir_ports ss_redir $cfgrulesserver
+		[ "$max_ss_redir_ports" = "0" ] && return 2
 		if [ "$min_ss_redir_ports" != "$max_ss_redir_ports" ]; then
 			all_ss_redir_ports=$min_ss_redir_ports-$max_ss_redir_ports
 		else