diff --git a/omr-tracker/files/bin/omr-tracker b/omr-tracker/files/bin/omr-tracker
index a6c1def2f..937b85602 100755
--- a/omr-tracker/files/bin/omr-tracker
+++ b/omr-tracker/files/bin/omr-tracker
@@ -63,6 +63,7 @@ _update_rto() {
 	if [ -z "$srtt" ]; then
 		srtt=$1
 		rttvar=$(echo "$(($1 / 2))" | cut -d. -f1)
+		#"
 	else
 		diff=$((srtt - $1))
 		rttvar=$(echo "$(((75 * rttvar + 25 * (diff >= 0 ? diff : -diff)) / 100))" | cut -d. -f1)
@@ -113,7 +114,7 @@ _ping_server() {
 				statusp=$?
 				if $(exit $statusp); then
 					serverip_ping=true
-					break
+					return
 				fi
 			fi
 		}
@@ -136,7 +137,7 @@ _httping_server() {
 				statusp=$?
 				if $(exit $statusp); then
 					serverip_ping=true
-					break
+					return
 				fi
 			fi
 		}
@@ -150,7 +151,7 @@ _ping() {
 	[ -z "$host" ] && return
 	local device=$2
 	local localip=$3
-	if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$OMR_TRACKER_NO_BIND" = "1" ] || [ "$(uci -q get network.$OMR_TRACKER_INTERFACE.proto)" = "3g" ] || [ "$(uci -q get network.$OMR_TRACKER_INTERFACE.proto)" = "qmi" ] || [ "$(uci -q get network.$OMR_TRACKER_INTERFACE.proto)" = "ncm" ]); then
+	if [ -n "$OMR_TRACKER_INTERFACE" ] && { [ "$OMR_TRACKER_NO_BIND" = "1" ] || [ "$(uci -q get network.$OMR_TRACKER_INTERFACE.proto)" = "3g" ] || [ "$(uci -q get network.$OMR_TRACKER_INTERFACE.proto)" = "qmi" ] || [ "$(uci -q get network.$OMR_TRACKER_INTERFACE.proto)" = "ncm" ]; }; then
 		ret=$(ping -I "${device}" \
 			-w "$OMR_TRACKER_TIMEOUT" \
 			-c "$OMR_TRACKER_COUNT" \
@@ -323,7 +324,7 @@ while true; do
 					OMR_TRACKER_DEVICE_GATEWAY=$(ip -4 r list dev "$OMR_TRACKER_DEVICE" | awk '/via/ {print $3;exit}' | tr -d "\n")
 				fi
 			fi
-			if ([ "$OMR_TRACKER_IPV6" = "1" ] || [ "$OMR_TRACKER_IPV6" = "auto" ]) && ([ "$OMR_TRACKER_FAMILY" = "ipv6" ] || [ "$OMR_TRACKER_FAMILY" = "ipv4ipv6" ]); then
+			if { [ "$OMR_TRACKER_IPV6" = "1" ] || [ "$OMR_TRACKER_IPV6" = "auto" ]; } && { [ "$OMR_TRACKER_FAMILY" = "ipv6" ] || [ "$OMR_TRACKER_FAMILY" = "ipv4ipv6" ]; }; then
 				#OMR_TRACKER_DEVICE_IP6=$(ip -6 -br addr ls dev "$OMR_TRACKER_DEVICE" | awk -F'[ /]+' '{print $3}')
 				#if [ -z "$OMR_TRACKER_DEVICE_IP6" ]; then
 					OMR_TRACKER_DEVICE_IP6=$(ip -6 addr show dev "$OMR_TRACKER_DEVICE" scope global | sort -r | grep -m 1 inet6 | awk '{print $2}' | cut -d'/' -s -f1)
@@ -349,7 +350,7 @@ while true; do
 			fi
 
 			# execute specific tracker
-			if ([ "$OMR_TRACKER_FAMILY" = "ipv4" ] || [ "$OMR_TRACKER_FAMILY" = "ipv4ipv6" ]) && [ -n "$OMR_TRACKER_DEVICE_IP" ] && [ -n "$OMR_TRACKER_DEVICE_GATEWAY" ]; then
+			if { [ "$OMR_TRACKER_FAMILY" = "ipv4" ] || [ "$OMR_TRACKER_FAMILY" = "ipv4ipv6" ]; } && [ -n "$OMR_TRACKER_DEVICE_IP" ] && [ -n "$OMR_TRACKER_DEVICE_GATEWAY" ]; then
 				# setup loop variable
 				if [ "$OMR_TRACKER_PREV_STATUS" = "ERROR" ]; then
 					tries="$OMR_TRACKER_TRIES_UP"
@@ -557,7 +558,7 @@ while true; do
 					sleep "${OMR_TRACKER_INTERVAL_TRIES:-1}"
 				done
 			fi
-			if [ "$OMR_TRACKER_STATUS" = "ERROR" ] && ([ -z "$OMR_TRACKER_DEVICE_IP" ] || [ -z "$OMR_TRACKER_DEVICE_GATEWAY" ] || [ -z "$OMR_TRACKER_DEVICE_IP6" ] || [ -z "$OMR_TRACKER_DEVICE_GATEWAY6" ]); then
+			if [ "$OMR_TRACKER_STATUS" = "ERROR" ] && { [ -z "$OMR_TRACKER_DEVICE_IP" ] || [ -z "$OMR_TRACKER_DEVICE_GATEWAY" ] || [ -z "$OMR_TRACKER_DEVICE_IP6" ] || [ -z "$OMR_TRACKER_DEVICE_GATEWAY6" ]; }; then
 				[ -z "$OMR_TRACKER_STATUS_MSG" ] && OMR_TRACKER_STATUS_MSG="$OMR_TRACKER_INTERFACE may have ip issues"
 				[ -z "$OMR_TRACKER_DEVICE_IP" ] && OMR_TRACKER_STATUS_MSG="$OMR_TRACKER_STATUS_MSG, interface have no IPv4"
 				[ -z "$OMR_TRACKER_DEVICE_GATEWAY" ] && OMR_TRACKER_STATUS_MSG="$OMR_TRACKER_STATUS_MSG, interface have no IPv4 gateway"
diff --git a/omr-tracker/files/bin/omr-tracker-server b/omr-tracker/files/bin/omr-tracker-server
index 39f0d48de..fe7fc0b12 100755
--- a/omr-tracker/files/bin/omr-tracker-server
+++ b/omr-tracker/files/bin/omr-tracker-server
@@ -320,7 +320,7 @@ _check_master() {
 			/etc/init.d/unbound restart >/dev/null 2>/dev/null
 			/etc/init.d/dnsmasq restart >/dev/null 2>/dev/null
 		}
-		break
+		return
 	}
 }
 
@@ -507,7 +507,7 @@ _check_backup() {
 			/etc/init.d/unbound restart >/dev/null 2>/dev/null
 			/etc/init.d/dnsmasq restart >/dev/null 2>/dev/null
 		}
-		[ "$server_ping" = true ] && break
+		[ "$server_ping" = true ] && return
 	}
 }
 
diff --git a/omr-tracker/files/etc/init.d/omr-tracker b/omr-tracker/files/etc/init.d/omr-tracker
index ee8f27291..1dd50002b 100755
--- a/omr-tracker/files/etc/init.d/omr-tracker
+++ b/omr-tracker/files/etc/init.d/omr-tracker
@@ -91,12 +91,14 @@ _launch_tracker() {
 	config_get gateway "$1" gateway
 	config_get ipv6 "$1" ipv6
 	config_get proto "$1" proto
+	config_get disabled "$1" disabled
 
 	#[ -z "$ifname" ] || [ -z "$multipath" ] || [ "$multipath" = "off" ] && [ "$1" != "glorytun" ] && [ "$1" != "omrvpn" ] && [ "$( uci -q get openmptcprouter.$1.multipathvpn)" != "1" ] && return
 	([ -z "$multipath" ] || [ "$multipath" = "off" ]) && [ "$1" != "glorytun" ] && [ "$1" != "omrvpn" ] && [ "$( uci -q get openmptcprouter.$1.multipathvpn)" != "1" ] && return
 	[ "$1" = "omrvpn" ] && [ "$(uci -q get openmptcprouter.settings.vpn)" = "none" ] && return
 	[ "${ifenabled}" = "0" ] && return
 	[ "${enabled}" = "0" ] && return
+	[ "${disabled}" = "1" ] && return
 	[ -z "${hosts}" ] && [ "$type" != "none" ] && return
 	ifstatus=$(ifstatus "$1" | jsonfilter -q -e '@["up"]')
 	ifdevice=$(ifstatus "$1" | jsonfilter -q -e '@["device"]')
diff --git a/omr-tracker/files/usr/share/omr/post-tracking.d/001-initialize b/omr-tracker/files/usr/share/omr/post-tracking.d/001-initialize
index d9ef59c14..7d58e5d9a 100755
--- a/omr-tracker/files/usr/share/omr/post-tracking.d/001-initialize
+++ b/omr-tracker/files/usr/share/omr/post-tracking.d/001-initialize
@@ -1,14 +1,20 @@
+#!/bin/sh
 
 # Set default multipath status
-[ "$OMR_TRACKER_INTERFACE" = "omrvpn" ] && multipath $OMR_TRACKER_DEVICE off 2>&1 >/dev/null
-[ "$OMR_TRACKER_INTERFACE" = "omr6in4" ] && multipath $OMR_TRACKER_DEVICE off 2>&1 >/dev/null
+[ "$OMR_TRACKER_INTERFACE" = "omrvpn" ] && multipath "$OMR_TRACKER_DEVICE" off >/dev/null 2>&1
+[ "$OMR_TRACKER_INTERFACE" = "omr6in4" ] && multipath "$OMR_TRACKER_DEVICE" off >/dev/null 2>&1
 
 if [ -n "$OMR_TRACKER_INTERFACE" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ "$OMR_TRACKER_INTERFACE" != "omrvpn" ] && [ "$OMR_TRACKER_INTERFACE" != "omr6in4" ]; then
 	metric="$(uci -q get network.$OMR_TRACKER_INTERFACE.metric)"
-	if [ -z "$metric" ] || ([ -n "$OMR_TRACKER_DEVICE_IP" ] && [ -z "$(ip route show table $metric | grep $OMR_TRACKER_DEVICE)" ]) || ([ -n "$OMR_TRACKER_DEVICE_IP6" ] && [ -z "$(ip -6 route show table 6${metric} | grep $OMR_TRACKER_DEVICE)" ]); then
+	if [ -z "$metric" ] || { [ -n "$OMR_TRACKER_DEVICE_IP" ] && [ -z "$(ip route show table $metric | grep $OMR_TRACKER_DEVICE)" ]; } || { [ -n "$OMR_TRACKER_DEVICE_IP6" ] && [ -z "$(ip -6 route show table 6${metric} | grep $OMR_TRACKER_DEVICE)" ]; }; then
 		_log "Routes not correctly set for $OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE table $metric) with IPs $OMR_TRACKER_DEVICE_IP $OMR_TRACKER_DEVICE_IP6"
 		/etc/init.d/mptcp reload "$OMR_TRACKER_DEVICE"
 		/etc/init.d/omr-tracker restart
 		exit 0
 	fi
+	if [ "$(uci -q get network.$OMR_TRACKER_INTERFACE.disabled)" = "1" ]; then
+		/etc/init.d/mptcp reload "$OMR_TRACKER_DEVICE"
+		/etc/init.d/omr-tracker restart
+		exit 0
+	fi
 fi
diff --git a/omr-tracker/files/usr/share/omr/post-tracking.d/002-error b/omr-tracker/files/usr/share/omr/post-tracking.d/002-error
index a74f74df6..6e422d69a 100755
--- a/omr-tracker/files/usr/share/omr/post-tracking.d/002-error
+++ b/omr-tracker/files/usr/share/omr/post-tracking.d/002-error
@@ -1,4 +1,4 @@
-
+#!/bin/sh
 
 . /lib/functions/network.sh
 
@@ -8,7 +8,7 @@ default_gw6=$(ip -6 route get 2606:4700:4700::1111 | grep via | awk '{print $3}'
 interface_up=$(ifstatus "$OMR_TRACKER_INTERFACE" 2>/dev/null | jsonfilter -q -e '@["up"]')
 
 # An interface in error will never be used in MPTCP
-if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || ([ "$OMR_TRACKER_INTERFACE" != "omrvpn" ] && [ "$interface_up" != "true" ]); then
+if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || { [ "$OMR_TRACKER_INTERFACE" != "omrvpn" ] && [ "$interface_up" != "true" ]; }; then
 	#interface_autostart=$(ifstatus "$OMR_TRACKER_INTERFACE" 2>/dev/null | jsonfilter -q -e '@["autostart"]')
 	#interface_available=$(ifstatus "$OMR_TRACKER_INTERFACE" 2>/dev/null | jsonfilter -q -e '@["available"]')
 	#interface_pending=$(ifstatus "$OMR_TRACKER_INTERFACE" 2>/dev/null | jsonfilter -q -e '@["pending"]')
@@ -37,14 +37,14 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || ([ "$OMR_TRACKER_INTERFACE" != "omrvpn
 				mm_state_failed=$(modemmanager_get_field "${MODEM_STATUS}" "modem.generic.state-failed-reason")
 				if [ "$mm_state_failed" = "unknown-capabilities" ]; then
 					_log "Interface $OMR_TRACKER_INTERFACE in failed state in ModemManager, reset modem..."
-					/usr/bin/mmcli -m ${modem} -r 2>&1 >/dev/null
+					/usr/bin/mmcli -m ${modem} -r >/dev/null 2>&1
 					sleep 30
 				elif false && [ "$mm_state_failed" = "sim-missing" ]; then
 					_log "Interface $OMR_TRACKER_INTERFACE in failed state in ModemManager, reset modem..."
-					/usr/bin/mmcli -m ${modem} -r 2>&1 >/dev/null
+					/usr/bin/mmcli -m ${modem} -r >/dev/null 2>&1
 					#_log "Interface $OMR_TRACKER_INTERFACE in failed state sim-missing in ModemManager, reset modem..."
 					#mm_primary_port=$(modemmanager_get_field "${MODEM_STATUS}" "modem.generic.primary-port")
-					#mbimcli -p -d /dev/$mm_primary_port --ms-device-reset 2>&1 >/dev/null
+					#mbimcli -p -d /dev/$mm_primary_port --ms-device-reset >/dev/null 2>&1
 				fi
 			elif [ "$mm_state" = "connected" ] || [ "$mm_state" = "enabled" ]; then
 				_log "No answer from $OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE), restart interface"
@@ -57,7 +57,7 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || ([ "$OMR_TRACKER_INTERFACE" != "omrvpn
 			elif [ "$mm_state" = "disabled" ]; then
 			# [ -n "$(echo $modeminfo | grep 'modem.3gpp.registration-state ' | grep home)" ]; then
 				_log "Interface $OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE) disabled, set it up"
-				/usr/bin/mmcli -m ${modem} -e 2>&1 >/dev/null
+				/usr/bin/mmcli -m ${modem} -e >/dev/null 2>&1
 				ifup $OMR_TRACKER_INTERFACE
 				sleep 30
 			elif [ "$mm_state" = "registered" ]; then
@@ -75,21 +75,21 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || ([ "$OMR_TRACKER_INTERFACE" != "omrvpn
 					if [ -n "$(uci -q get network.$OMR_TRACKER_INTERFACE.pincode)" ]; then
 						if [ "$mm_unlock_retries" -gt "1" ] && [ -n "$(uci -q get network.$OMR_TRACKER_INTERFACE.pincode)" ]; then
 							_log "Interface $OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE) locked, set PIN"
-							mmcli -a -m ${modem} -i $mm_generic_sim --pin=$(uci -q get network.$OMR_TRACKER_INTERFACE.pincode) 2>&1 >/dev/null
+							mmcli -a -m ${modem} -i $mm_generic_sim --pin=$(uci -q get network.$OMR_TRACKER_INTERFACE.pincode) >/dev/null 2>&1
 							sleep 20
 							ifup $OMR_TRACKER_INTERFACE
 						fi
 					fi
 				elif [ "$mm_unlock_required" = "sim-puk" ] && [ "$mm_unlock_retries" -gt "1" ] && [ -n "$(uci -q get network.$OMR_TRACKER_INTERFACE.pukcode)" ] && [ -n "$(uci -q get network.$OMR_TRACKER_INTERFACE.pincode)" ]; then
 					_log "Interface $OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE) locked, set PUK"
-					mmcli -i $mm_generic_sim --puk=$(uci -q get network.$OMR_TRACKER_INTERFACE.pukcode) --pin=$(uci -q get network.$OMR_TRACKER_INTERFACE.pincode) 2>&1 >/dev/null
+					mmcli -i $mm_generic_sim --puk=$(uci -q get network.$OMR_TRACKER_INTERFACE.pukcode) --pin=$(uci -q get network.$OMR_TRACKER_INTERFACE.pincode) >/dev/null 2>&1
 					sleep 30
 				fi
 			fi
 		fi
 		if [ "$modemfind" = "0" ]; then
 			#_log "Can't find $OMR_TRACKER_INTERFACE in ModemManager, rescan modem..."
-			#/usr/bin/mmcli -S 2>&1 >/dev/null
+			#/usr/bin/mmcli -S >/dev/null 2>&1
 			#_log "Can't find $OMR_TRACKER_INTERFACE in ModemManager, restart modemmanager..."
 			_log "Can't find $OMR_TRACKER_INTERFACE in ModemManager"
 			#/etc/init.d/modemmanager restart
@@ -119,8 +119,8 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || ([ "$OMR_TRACKER_INTERFACE" != "omrvpn
 
 	# Get the current multipath status
 	multipath_status="off"
-#	[ "$OMR_TRACKER_INTERFACE" = "omrvpn" ] && multipath $OMR_TRACKER_DEVICE off 2>&1 >/dev/null
-#	[ "$OMR_TRACKER_INTERFACE" = "omr6in4" ] && multipath $OMR_TRACKER_DEVICE off 2>&1 >/dev/null
+#	[ "$OMR_TRACKER_INTERFACE" = "omrvpn" ] && multipath $OMR_TRACKER_DEVICE off >/dev/null 2>&1
+#	[ "$OMR_TRACKER_INTERFACE" = "omr6in4" ] && multipath $OMR_TRACKER_DEVICE off >/dev/null 2>&1
 	if [ -e "/sys/class/net/$OMR_TRACKER_DEVICE" ]; then
 		case "$(multipath "$OMR_TRACKER_DEVICE")" in
 			*default*)      multipath_status="on"       ;;
@@ -129,7 +129,7 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || ([ "$OMR_TRACKER_INTERFACE" != "omrvpn
 		esac
 	fi
 
-	if [ "$multipath_status" != "off" ] || ([ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.multipathvpn)" = "1" ]); then
+	if [ "$multipath_status" != "off" ] || { [ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.multipathvpn)" = "1" ]; }; then
 		if [ "$OMR_TRACKER_STATUS_MSG" = "" ]; then
 			_log "$OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE) switched off (interface up status: $interface_up - Tracker status: $OMR_TRACKER_STATUS)"
 		else
@@ -142,22 +142,22 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || ([ "$OMR_TRACKER_INTERFACE" != "omrvpn
 		#	multipath "$OMR_TRACKER_DEVICE" off > /dev/null 2>&1
 		#fi
 		if [ -n "$OMR_TRACKER_DEVICE_IP" ]; then
-			glorytun-udp path addr $OMR_TRACKER_DEVICE_IP dev tun0 set down > /dev/null 2>&1
+			glorytun-udp path addr "$OMR_TRACKER_DEVICE_IP" dev tun0 set down > /dev/null 2>&1
 		fi
 		if [ -n "$OMR_TRACKER_DEVICE_IP6" ]; then
-			glorytun-udp path addr $OMR_TRACKER_DEVICE_IP6 dev tun0 set down > /dev/null 2>&1
+			glorytun-udp path addr "$OMR_TRACKER_DEVICE_IP6" dev tun0 set down > /dev/null 2>&1
 		fi
 		if [ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.vpn)" = "1" ] && [ "$(uci -q get openmptcprouter.settings.mptcpovervpn)" = "openvpn" ]; then
 			VPN_BASE_INTF="$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.baseintf)"
 			VPN_BASE_INTF_IP=$(ubus call network.interface.$VPN_BASE_INTF status | jsonfilter -e '@["ipv4-address"][0].address' | tr -d "\n")
 			if [ -n "$VPN_BASE_INTF" ]; then
 				uci -q batch <<-EOF >/dev/null
-					set openvpn.$VPN_BASE_INTF.local=$VPN_BASE_INTF_IP
+					set openvpn.$VPN_BASE_INTF.local="$VPN_BASE_INTF_IP"
 					commit openvpn
 				EOF
 			fi
-			[ -z "VPN_BASE_INTF" ] && VPN_BASE_INTF="omr"
-			/etc/init.d/openvpn restart $VPN_BASE_INTF 2>&1 >/dev/null
+			[ -z "$VPN_BASE_INTF" ] && VPN_BASE_INTF="omr"
+			/etc/init.d/openvpn restart "$VPN_BASE_INTF" >/dev/null 2>&1
 		fi
 		config_load openmptcprouter
 		config_foreach del_server_route server
@@ -165,7 +165,7 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || ([ "$OMR_TRACKER_INTERFACE" != "omrvpn
 		#if [ "$(uci -q get openmptcprouter.settings.master)" = "balancing" ] && [ "$(uci -q get openmptcprouter.settings.vpn)" != "mlvpn" ]; then
 
 		if [ -n "$OMR_TRACKER_INTERFACE" ]; then
-			if ([ "$default_gw" = "$OMR_TRACKER_DEVICE_GATEWAY" ] || [ "$default_gw" = "" ] || [ "$default_gw6" != "$OMR_TRACKER_DEVICE_GATEWAY6" ]) && [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ]; then
+			if { [ "$default_gw" = "$OMR_TRACKER_DEVICE_GATEWAY" ] || [ "$default_gw" = "" ] || [ "$default_gw6" != "$OMR_TRACKER_DEVICE_GATEWAY6" ]; } && [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ]; then
 				[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Default gw: $default_gw - Set routes (current: $(ip r) )"
 				config_load network
 				config_foreach set_route interface $OMR_TRACKER_INTERFACE
@@ -219,9 +219,9 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || ([ "$OMR_TRACKER_INTERFACE" != "omrvpn
 	[ -z "$restart_down" ] && restart_down="$(uci -q get omr-tracker.defaults.restart_down)"
 	[ "$restart_down" = "1" ] && {
 		_log "Restart $OMR_TRACKER_INTERFACE"
-		ifdown $OMR_TRACKER_INTERFACE 2>&1 >/dev/null
+		ifdown $OMR_TRACKER_INTERFACE >/dev/null 2>&1
 		sleep 5
-		ifup $OMR_TRACKER_INTERFACE 2>&1 >/dev/null
+		ifup $OMR_TRACKER_INTERFACE >/dev/null 2>&1
 	}
 
 	if [ "$OMR_TRACKER_INTERFACE" = "glorytun" ] || [ "$OMR_TRACKER_INTERFACE" = "omrvpn" ] || [ "$OMR_TRACKER_INTERFACE" = "omr6in4" ]; then
@@ -241,29 +241,29 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || ([ "$OMR_TRACKER_INTERFACE" != "omrvpn
 			_log "Tunnel down use ShadowSocks for UDP"
 			uci -q set shadowsocks-libev.ss_rules.redir_udp='hi1'
 			if /etc/init.d/shadowsocks-libev rules_exist ; then
-				/etc/init.d/shadowsocks-libev rules_down 2>&1 >/dev/null
-				/etc/init.d/shadowsocks-libev rules_up 2>&1 >/dev/null
+				/etc/init.d/shadowsocks-libev rules_down >/dev/null 2>&1
+				/etc/init.d/shadowsocks-libev rules_up >/dev/null 2>&1
 			fi
 		fi
 		if [ "$(uci -q get dsvpn.vpn.enable)" = "1" ]; then
 			_log "DSVPN down, restart it"
-			/etc/init.d/dsvpn restart 2>&1 >/dev/null
+			/etc/init.d/dsvpn restart >/dev/null 2>&1
 		fi
 		if [ "$(uci -q get mlvpn.general.enable)" = "1" ]; then
 			_log "MLVPN down, restart it"
-			/etc/init.d/mlvpn restart 2>&1 >/dev/null
+			/etc/init.d/mlvpn restart >/dev/null 2>&1
 		fi
 		if [ "$(uci -q get glorytun.vpn.enable)" = "1" ]; then
 			_log "Glorytun VPN down, restart it"
-			/etc/init.d/glorytun restart 2>&1 >/dev/null
+			/etc/init.d/glorytun restart >/dev/null 2>&1
 		fi
 		if [ "$(uci -q get glorytun-udp.vpn.enable)" = "1" ]; then
 			_log "Glorytun UDP VPN down, restart it"
-			/etc/init.d/glorytun-udp restart 2>&1 >/dev/null
+			/etc/init.d/glorytun-udp restart >/dev/null 2>&1
 		fi
 		if [ "$(uci -q get openvpn.omr.enabled)" = "1" ]; then
 			_log "OpenVPN down, restart it"
-			/etc/init.d/openvpn restart omr 2>&1 >/dev/null
+			/etc/init.d/openvpn restart omr >/dev/null 2>&1
 		fi
 		config_load openmptcprouter
 		config_foreach disable_pihole server
diff --git a/omr-tracker/files/usr/share/omr/post-tracking.d/003-up b/omr-tracker/files/usr/share/omr/post-tracking.d/003-up
index c6e78e807..aed7c3eee 100755
--- a/omr-tracker/files/usr/share/omr/post-tracking.d/003-up
+++ b/omr-tracker/files/usr/share/omr/post-tracking.d/003-up
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 if [ "$OMR_TRACKER_STATUS" = "ERROR" ]; then
 	exit 0
 fi
@@ -14,12 +16,12 @@ find_network_device() {
 		local cfg="${1}"
 		local device="${2}"
 
-		local type name
+		local name
 		config_get name "${cfg}" name
 
 		[ "${name}" = "${device}" ] && device_section="${cfg}"
 	}
-	if [ ! -z "$device" ]; then
+	if [ -n "$device" ]; then
 		config_load network
 		config_foreach check_device device "$(uci -q network.${device}.device)"
 	fi
@@ -61,8 +63,8 @@ set_route() {
 		if [ "$interface_gw" != "" ] && [ "$interface_if" != "" ]; then
 			[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && [ "$SETDEFAULT" = "yes" ] && _log "$PREVINTERFACE down. Replace default route by $interface_gw dev $interface_if"
 			[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && [ "$SETDEFAULT" != "yes" ] && _log "$PREVINTERFACE down. Replace default in table 991337 route by $interface_gw dev $interface_if"
-			[ "$SETDEFAULT" = "yes" ] && [ "$(uci -q openmptcprouter.settings.defaultgw)" != "0" ] && ip route replace default scope global metric 1 via $interface_gw dev $interface_if $initcwrwnd 2>&1 >/dev/null
-			ip route replace default via $interface_gw dev $interface_if table 991337 $initcwrwnd 2>&1 >/dev/null && SETROUTE=true
+			[ "$SETDEFAULT" = "yes" ] && [ "$(uci -q openmptcprouter.settings.defaultgw)" != "0" ] && ip route replace default scope global metric 1 via $interface_gw dev $interface_if $initcwrwnd >/dev/null 2>&1
+			ip route replace default via $interface_gw dev $interface_if table 991337 $initcwrwnd >/dev/null 2>&1 && SETROUTE=true
 		fi
 	fi
 }
@@ -101,8 +103,8 @@ set_route6() {
 		fi
 		if [ "$interface_gw" != "" ] && [ "$interface_if" != "" ] && [ -n "$(echo $interface_gw | grep ':')" ]; then
 			[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "$PREVINTERFACE down. Replace default route by $interface_gw dev $interface_if"
-			[ "$SETDEFAULT" = "yes" ] && [ "$(uci -q openmptcprouter.settings.defaultgw)" != "0" ] && ip -6 route replace default scope metric 1 global nexthop via $interface_gw dev $interface_if 2>&1 >/dev/null
-			ip -6 route replace default via $interface_gw dev $interface_if table 991337 2>&1 >/dev/null && SETROUTE=true
+			[ "$SETDEFAULT" = "yes" ] && [ "$(uci -q openmptcprouter.settings.defaultgw)" != "0" ] && ip -6 route replace default scope metric 1 global nexthop via $interface_gw dev $interface_if >/dev/null 2>&1
+			ip -6 route replace default via $interface_gw dev $interface_if table 991337 >/dev/null 2>&1 && SETROUTE=true
 		fi
 	fi
 }
@@ -127,7 +129,7 @@ set_server_default_route() {
 			if [ "$(ip r show $serverip | grep nexthop)" != "" ]; then
 				ip r delete $serverip >/dev/null 2>&1
 			fi
-			ip route replace $serverip via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE metric 1 $initcwrwnd 2>&1 >/dev/null
+			ip route replace $serverip via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE metric 1 $initcwrwnd >/dev/null 2>&1
 		fi
 	}
 	config_list_foreach $server ip server_route
@@ -153,7 +155,7 @@ set_server_default_route6() {
 			if [ "$(ip -6 r show $serverip | grep nexthop)" != "" ]; then
 				ip -6 r delete $serverip >/dev/null 2>&1
 			fi
-			ip -6 route replace $serverip via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE metric 1 2>&1 >/dev/null
+			ip -6 route replace $serverip via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE metric 1 >/dev/null 2>&1
 		fi
 	}
 	config_list_foreach $server ip server_route
@@ -204,12 +206,12 @@ set_routes_intf() {
 	[ -z "$interface_if" ] && interface_if=$(ifstatus "${INTERFACE}_4" 2>/dev/null | jsonfilter -q -e '@["l3_device"]')
 	[ -z "$interface_if" ] && interface_if=$(uci -q get network.$INTERFACE.device)
 	[ -z "$interface_if" ] && interface_if=$(uci -q get network.$INTERFACE.ifname)
-	[ -n "$(echo $interface_if | grep '@')" ] && ifname=$(ifstatus "$INTERFACE" | jsonfilter -q -e '@["device"]')
+	[ -n "$(echo $interface_if | grep '@')" ] && interface_if=$(ifstatus "$INTERFACE" | jsonfilter -q -e '@["device"]')
 	interface_up=$(ifstatus "$INTERFACE" 2>/dev/null | jsonfilter -q -e '@["up"]')
 	#multipath_current_config=$(multipath $interface_if | grep 'deactivated')
 	interface_current_config=$(uci -q get openmptcprouter.$INTERFACE.state || echo "up")
 	interface_vpn=$(uci -q get openmptcprouter.$INTERFACE.vpn || echo "0")
-	if ([ "$interface_vpn" = "0" ] || [ "$(uci -q get openmptcprouter.settings.allmptcpovervpn)" = "0" ]) && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_if" != "" ] && [ "$interface_up" = "true" ]; then
+	if { [ "$interface_vpn" = "0" ] || [ "$(uci -q get openmptcprouter.settings.allmptcpovervpn)" = "0" ]; } && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_if" != "" ] && [ "$interface_up" = "true" ]; then
 		interface_gw="$(uci -q get network.$INTERFACE.gateway)"
 		if [ -z "$interface_gw" ]; then
 			interface_gw=$(ubus call network.interface.$INTERFACE status 2>/dev/null | jsonfilter -q -l 1 -e '@.inactive.route[@.target="0.0.0.0"].nexthop' | tr -d "\n")
@@ -266,7 +268,7 @@ set_routes_intf6() {
 	#multipath_current_config=$(multipath $interface_if | grep 'deactivated')
 	interface_current_config=$(uci -q get openmptcprouter.$INTERFACE.state || echo "up")
 	interface_vpn=$(uci -q get openmptcprouter.$INTERFACE.vpn || echo "0")
-	if ([ "$interface_vpn" = "0" ] || [ "$(uci -q get openmptcprouter.settings.allmptcpovervpn)" = "0" ]) && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_if" != "" ] && [ "$interface_up" = "true" ]; then
+	if { [ "$interface_vpn" = "0" ] || [ "$(uci -q get openmptcprouter.settings.allmptcpovervpn)" = "0" ]; } && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_if" != "" ] && [ "$interface_up" = "true" ]; then
 		interface_gw="$(uci -q get network.$INTERFACE.ip6gw)"
 		interface_ip6="$(uci -q get network.$INTERFACE.ip6)"
 		if [ -z "$interface_gw" ]; then
@@ -338,7 +340,7 @@ set_route_balancing() {
 	interface_up=$(ifstatus "$INTERFACE" 2>/dev/null | jsonfilter -q -e '@["up"]')
 	interface_current_config=$(uci -q get openmptcprouter.$INTERFACE.state || echo "up")
 	interface_vpn=$(uci -q get openmptcprouter.$INTERFACE.vpn || echo "0")
-	if ([ "$interface_vpn" = "0" ] || [ "$(uci -q get openmptcprouter.settings.allmptcpovervpn)" = "0" ]) && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_up" = "true" ]; then
+	if { [ "$interface_vpn" = "0" ] || [ "$(uci -q get openmptcprouter.settings.allmptcpovervpn)" = "0" ]; } && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_up" = "true" ]; then
 		interface_gw="$(uci -q get network.$INTERFACE.gateway)"
 		if [ -z "$interface_gw" ]; then
 			interface_gw=$(ubus call network.interface.$INTERFACE status 2>/dev/null | jsonfilter -q -l 1 -e '@.inactive.route[@.target="0.0.0.0"].nexthop' | tr -d "\n")
@@ -397,7 +399,7 @@ set_route_balancing6() {
 	interface_up=$(ifstatus "$INTERFACE" 2>/dev/null | jsonfilter -q -e '@["up"]')
 	interface_current_config=$(uci -q get openmptcprouter.$INTERFACE.state || echo "up")
 	interface_vpn=$(uci -q get openmptcprouter.$INTERFACE.vpn || echo "0")
-	if ([ "$interface_vpn" = "0" ] || [ "$(uci -q get openmptcprouter.settings.allmptcpovervpn)" = "0" ]) && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_up" = "true" ]; then
+	if { [ "$interface_vpn" = "0" ] || [ "$(uci -q get openmptcprouter.settings.allmptcpovervpn)" = "0" ]; } && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_up" = "true" ]; then
 		interface_gw="$(uci -q get network.$INTERFACE.gateway)"
 		interface_ip6="$(uci -q get network.$INTERFACE.ip6)"
 		if [ -z "$interface_gw" ]; then
@@ -484,17 +486,17 @@ set_server_all_routes() {
 			config_foreach set_routes_intf interface
 			uintf="$(echo $routesintf | awk '{print $5}')"
 			uintfb="$(echo $routesintfbackup | awk '{print $5}')"
-			if [ -n "$routesintf" ] && ([ "$nbintf" -gt "1" ] && [ "$(ip r show $serverip metric 1 | tr -d '\t' | tr -d '\n' | sed 's/ *$//' | tr ' ' '\n' | sort | tr -d '\n')" != "$(echo $serverip $routesintf | sed 's/ *$//' | tr ' ' '\n' | sort | tr -d '\n')" ]) || ([ "$nbintf" = "1" ] && [ -n "$uintf" ] && [ "$(ip r show $serverip metric 1 | grep $uintf)" = "" ]); then
+			if [ -n "$routesintf" ] && { [ "$nbintf" -gt "1" ] && [ "$(ip r show $serverip metric 1 | tr -d '\t' | tr -d '\n' | sed 's/ *$//' | tr ' ' '\n' | sort | tr -d '\n')" != "$(echo $serverip $routesintf | sed 's/ *$//' | tr ' ' '\n' | sort | tr -d '\n')" ]; } || { [ "$nbintf" = "1" ] && [ -n "$uintf" ] && [ "$(ip r show $serverip metric 1 | grep $uintf)" = "" ]; }; then
 				while [ "$(ip r show $serverip | grep -v nexthop | sed 's/ //g' | tr -d '\n')" != "$serverip" ] && [ "$(ip r show $serverip | grep -v nexthop | sed 's/ //g' | tr -d '\n')" != "" ]; do
 					ip r del $serverip
 				done
 				[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Set server $server ($serverip) default route $serverip $routesintf"
-				ip route replace $serverip scope global metric 1 $routesintf 2>&1 >/dev/null
+				ip route replace $serverip scope global metric 1 $routesintf >/dev/null 2>&1
 				[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "New server route is $(ip r show $serverip metric 1 | tr -d '\t' | tr -d '\n')"
 			fi
-			if [ -n "$routesintfbackup" ] && ([ "$nbintfb" -gt "1" ] && [ "$(ip r show $serverip metric 999 | tr -d '\t' | tr -d '\n' | sed 's/ *$//' | tr ' ' '\n' | sort | tr -d '\n')" != "$(echo $serverip $routesintfbackup | sed 's/ *$//' | tr ' ' '\n' | sort | tr -d '\n')" ]) || ([ "$nbintfb" = "1" ] && [ -n "$uintfb" ] && [ "$(ip r show $serverip metric 999 | grep $uintfb)" = "" ]); then
+			if [ -n "$routesintfbackup" ] && { [ "$nbintfb" -gt "1" ] && [ "$(ip r show $serverip metric 999 | tr -d '\t' | tr -d '\n' | sed 's/ *$//' | tr ' ' '\n' | sort | tr -d '\n')" != "$(echo $serverip $routesintfbackup | sed 's/ *$//' | tr ' ' '\n' | sort | tr -d '\n')" ]; } || { [ "$nbintfb" = "1" ] && [ -n "$uintfb" ] && [ "$(ip r show $serverip metric 999 | grep $uintfb)" = "" ]; }; then
 				[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Set server $server ($serverip) backup default route $serverip $routesintfbackup nbintfb $nbintfb $OMR_TRACKER_DEVICE"
-				ip route replace $serverip scope global metric 999 $routesintfbackup 2>&1 >/dev/null
+				ip route replace $serverip scope global metric 999 $routesintfbackup >/dev/null 2>&1
 			fi
 		fi
 	}
@@ -532,17 +534,17 @@ set_server_all_routes6() {
 			config_foreach set_routes_intf6 interface
 			uintf="$(echo $routesintf6 | awk '{print $5}')"
 			uintfb="$(echo $routesintfbackup6 | awk '{print $5}')"
-			if [ -n "$routesintf6" ] && ([ "$nbintf6" -gt "1" ] && [ "$(ip -6 r show $serverip metric 1 | tr -d '\t' | sort | tr -d '\n' | sed 's/ *$//')" != "$(echo $serverip $routesintf6 | sort | sed 's/ *$//')" ]) || ([ "$nbintf6" = "1" ] && [ -n "$uintf" ] && [ "$(ip -6 r show $serverip metric 1 | grep $uintf)" = "" ]); then
+			if [ -n "$routesintf6" ] && { [ "$nbintf6" -gt "1" ] && [ "$(ip -6 r show $serverip metric 1 | tr -d '\t' | sort | tr -d '\n' | sed 's/ *$//')" != "$(echo $serverip $routesintf6 | sort | sed 's/ *$//')" ]; } || { [ "$nbintf6" = "1" ] && [ -n "$uintf" ] && [ "$(ip -6 r show $serverip metric 1 | grep $uintf)" = "" ]; }; then
 				while [ "$(ip -6 r show $serverip | grep -v nexthop | sed 's/ //g' | tr -d '\n')" != "$serverip" ] && [ "$(ip -6 r show $serverip | grep -v nexthop | sed 's/ //g' | tr -d '\n')" != "" ]; do
 					ip -6 r del $serverip
 				done
 				[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Set server $server ($serverip) default route $serverip $routesintf6"
-				ip -6 route replace $serverip scope global metric 1 $routesintf6 2>&1 >/dev/null
+				ip -6 route replace $serverip scope global metric 1 $routesintf6 >/dev/null 2>&1
 				[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "New server route is $(ip -6 r show $serverip metric 1 | tr -d '\t' | tr -d '\n')"
 			fi
-			if [ -n "$routesintfbackup6" ] && ([ "$nbintfb6" -gt "1" ] && [ "$(ip -6 r show $serverip metric 999 | tr -d '\t' | tr -d '\n')" != "$serverip $routesintfbackup6 " ]) || ([ "$nbintfb6" = "1" ] && [ -n "$uintfb" ] && [ "$(ip -6 r show $serverip metric 999 | grep $uintfb)" = "" ]); then
+			if [ -n "$routesintfbackup6" ] && { [ "$nbintfb6" -gt "1" ] && [ "$(ip -6 r show $serverip metric 999 | tr -d '\t' | tr -d '\n')" != "$serverip $routesintfbackup6 " ]; } || { [ "$nbintfb6" = "1" ] && [ -n "$uintfb" ] && [ "$(ip -6 r show $serverip metric 999 | grep $uintfb)" = "" ]; }; then
 				[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Set server $server ($serverip) backup default route $serverip $routesintfbackup6 nbintfb $nbintfb6 $OMR_TRACKER_DEVICE"
-				ip -6 route replace $serverip scope global metric 999 $routesintfbackup6 2>&1 >/dev/null
+				ip -6 route replace $serverip scope global metric 999 $routesintfbackup6 >/dev/null 2>&1
 			fi
 		fi
 	}
@@ -581,12 +583,12 @@ set_server_route() {
 		#if [ "$serverip" != "" ] && [ "$OMR_TRACKER_DEVICE_GATEWAY" != "" ] && [ "$(ip route show dev $OMR_TRACKER_DEVICE metric $metric | grep $serverip | grep $OMR_TRACKER_DEVICE_GATEWAY)" = "" ] && [ "$multipath_config_route" != "off" ] && [ "$multipath_current_config" = "" ]; then
 		if [ "$serverip" != "" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ "$OMR_TRACKER_DEVICE_GATEWAY" != "" ] && [ "$(ip route show dev $OMR_TRACKER_DEVICE metric $metric | grep $serverip | grep $OMR_TRACKER_DEVICE_GATEWAY)" = "" ] && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_up" = "true" ]; then
 			[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Set server $server ($serverip) route via $OMR_TRACKER_DEVICE_GATEWAY metric $metric"
-			ip route replace $serverip via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE metric $metric $initcwrwnd 2>&1 >/dev/null
+			ip route replace $serverip via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE metric $metric $initcwrwnd >/dev/null 2>&1
 		fi
 	}
 	config_list_foreach $server ip server_route
 	if [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ] && [ -n "$metric" ] && [ "$OMR_TRACKER_DEVICE_GATEWAY" != "" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ "$(ip route show dev $OMR_TRACKER_DEVICE metric $metric | grep default | grep $OMR_TRACKER_DEVICE_GATEWAY)" = "" ] && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_up" = "true" ]; then
-		ip route replace default via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE metric $metric $initcwrwnd 2>&1 >/dev/null
+		ip route replace default via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE metric $metric $initcwrwnd >/dev/null 2>&1
 	fi
 }
 
@@ -619,12 +621,12 @@ set_server_route6() {
 		#if [ "$serverip" != "" ] && [ "$OMR_TRACKER_DEVICE_GATEWAY6" != "" ] && [ "$(ip -6 route show dev $OMR_TRACKER_DEVICE metric $metric | grep $serverip | grep $OMR_TRACKER_DEVICE_GATEWAY)" = "" ] && [ "$multipath_config_route" != "off" ] && [ "$multipath_current_config" = "" ]; then
 		if [ "$serverip" != "" ] && [ "$OMR_TRACKER_DEVICE_GATEWAY6" != "" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ "$(ip -6 route show dev $OMR_TRACKER_DEVICE metric $metric | grep $serverip | grep $OMR_TRACKER_DEVICE_GATEWAY6)" = "" ] && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_up" = "true" ]; then
 			[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Set server $server ($serverip) route via $OMR_TRACKER_DEVICE_GATEWAY metric $metric"
-			ip -6 route replace $serverip via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE metric $metric 2>&1 >/dev/null
+			ip -6 route replace $serverip via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE metric $metric >/dev/null 2>&1
 		fi
 	}
 	config_list_foreach $server ip server_route
 	if [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ] && [ "$OMR_TRACKER_DEVICE_GATEWAY6" != "" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ -n "$metric" ] && [ "$(ip -6 route show dev $OMR_TRACKER_DEVICE metric $metric | grep default | grep $OMR_TRACKER_DEVICE_GATEWAY6)" = "" ] && [ "$multipath_config_route" != "off" ] && [ "$interface_current_config" = "up" ] && [ "$interface_up" = "true" ]; then
-		ip -6 route replace default via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE metric $metric 2>&1 >/dev/null
+		ip -6 route replace default via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE metric $metric >/dev/null 2>&1
 	fi
 }
 
@@ -686,7 +688,7 @@ disable_pihole() {
 				commit dhcp
 			EOF
 		fi
-		/etc/init.d/dnsmasq restart 2>&1 >/dev/null
+		/etc/init.d/dnsmasq restart >/dev/null 2>&1
 	fi
 }
 
@@ -712,8 +714,6 @@ dns_flush() {
 
 # Get the current multipath status
 multipath_status="off"
-[ "$OMR_TRACKER_INTERFACE" = "omrvpn" ] && multipath $OMR_TRACKER_DEVICE off 2>&1 >/dev/null
-[ "$OMR_TRACKER_INTERFACE" = "omr6in4" ] && multipath $OMR_TRACKER_DEVICE off 2>&1 >/dev/null
 if [ -e "/sys/class/net/$OMR_TRACKER_DEVICE" ]; then
 	case "$(multipath "$OMR_TRACKER_DEVICE")" in
 		*default*)      multipath_status="on"       ;;
@@ -735,7 +735,7 @@ interface_up=$(ifstatus "$OMR_TRACKER_INTERFACE" 2>/dev/null | jsonfilter -q -e
 
 if [ -n "$OMR_TRACKER_INTERFACE" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ "$OMR_TRACKER_INTERFACE" != "omrvpn" ] && [ "$OMR_TRACKER_INTERFACE" != "omr6in4" ]; then
 	metric="$(uci -q get network.$OMR_TRACKER_INTERFACE.metric)"
-	if [ -z "$metric" ] || ([ -n "$OMR_TRACKER_DEVICE_IP" ] && [ -z "$(ip route show table $metric | grep $OMR_TRACKER_DEVICE)" ]) || ([ -n "$OMR_TRACKER_DEVICE_IP6" ] && [ -z "$(ip -6 route show table 6${metric} | grep $OMR_TRACKER_DEVICE)" ]); then
+	if [ -z "$metric" ] || { [ -n "$OMR_TRACKER_DEVICE_IP" ] && [ -z "$(ip route show table $metric | grep $OMR_TRACKER_DEVICE)" ]; } || { [ -n "$OMR_TRACKER_DEVICE_IP6" ] && [ -z "$(ip -6 route show table 6${metric} | grep $OMR_TRACKER_DEVICE)" ]; }; then
 		_log "Routes not correctly set for $OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE table $metric) with IPs $OMR_TRACKER_DEVICE_IP $OMR_TRACKER_DEVICE_IP6"
 		/etc/init.d/mptcp reload "$OMR_TRACKER_DEVICE"
 		/etc/init.d/omr-tracker restart
@@ -753,21 +753,21 @@ if [ "$OMR_TRACKER_INTERFACE" = "glorytun" ] || [ "$OMR_TRACKER_INTERFACE" = "om
 			/etc/init.d/shadowsocks-libev rules_up >/dev/null 2>&1
 		fi
 	fi
-	if ([ "$default_gw" != "$OMR_TRACKER_DEVICE_GATEWAY" ] || [ "$default_gw" = "" ]) && [ "$OMR_TRACKER_DEVICE_GATEWAY" != "" ]; then
+	if { [ "$default_gw" != "$OMR_TRACKER_DEVICE_GATEWAY" ] || [ "$default_gw" = "" ]; } && [ "$OMR_TRACKER_DEVICE_GATEWAY" != "" ]; then
 		_log "Tunnel up : Replace default route by $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE (was $default_gw)"
 		[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Default gw : $default_gw - Current route: $(ip r)"
-		ip route replace default scope global via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE $initcwrwnd 2>&1 >/dev/null
+		ip route replace default scope global via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE $initcwrwnd >/dev/null 2>&1
 		if [ "$(pgrep -f openmptcprouter-vps)" = "" ]; then
 			/etc/init.d/openmptcprouter-vps restart >/dev/null 2>&1 &
 		fi
-		[ "$(uci -q get shadowsocks-libev.sss0.disabled)" != "1" ] && conntrack -D -p udp 2>&1 >/dev/null
+		[ "$(uci -q get shadowsocks-libev.sss0.disabled)" != "1" ] && conntrack -D -p udp >/dev/null 2>&1
 		[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "New route: $(ip r)"
 	fi
 
 	# Set VPN MTU
-	if [ -n "$OMR_TRACKER_LATENCY" ] && [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc)" = "" ] || [ $(($(date +"%s") - $(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc))) -gt 3600 ]); then
+	if [ -n "$OMR_TRACKER_LATENCY" ] && [ -n "$OMR_TRACKER_INTERFACE" ] && { [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc)" = "" ] || [ $(($(date +"%s") - $(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc))) -gt 3600 ]; }; then
 		_log "Set VPN MTU"
-		local serverip=$(uci -q get shadowsocks-libev.sss0.server)
+		serverip=$(uci -q get shadowsocks-libev.sss0.server)
 		[ -z "$serverip" ] && serverip=$(uci -q get shadowsocks-rust.sss0.server)
 		[ -z "$serverip" ] && serverip=$(uci -q get v2ray.omrout.s_vless_address)
 		[ -n "$serverip" ] && serverip="$(resolveip -4 -t 5 $serverip | head -n 1 | tr -d '\n')"
@@ -786,7 +786,7 @@ if [ "$OMR_TRACKER_INTERFACE" = "glorytun" ] || [ "$OMR_TRACKER_INTERFACE" = "om
 				uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.lc=$(date +"%s")
 			elif [ -z "$(uci -q get openmptcprouter.${OMR_TRACKER_INTERFACE}.mtu)" ] && [ -n "$OMR_TRACKER_DEVICE_IP" ] && [ -n "$OMR_TRACKER_DEVICE" ]; then
 				if [ -n "$serverip" ] && [ "$serverip" != "127.0.0.1" ]; then 
-					local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP $serverip)
+					mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP $serverip)
 					#local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP 8.8.8.8)
 					[ -n "$mtu" ] && {
 						uci -q set openmptcprouter.${OMR_TRACKER_INTERFACE}.mtu=$mtu
@@ -794,7 +794,7 @@ if [ "$OMR_TRACKER_INTERFACE" = "glorytun" ] || [ "$OMR_TRACKER_INTERFACE" = "om
 						uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.lc=$(date +"%s")
 					}
 				else
-					local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP 1.1.1.1)
+					mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP 1.1.1.1)
 					[ -n "$mtu" ] && {
 						uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.mtu=$mtu
 						ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
@@ -814,7 +814,7 @@ if [ "$OMR_TRACKER_INTERFACE" = "glorytun" ] || [ "$OMR_TRACKER_INTERFACE" = "om
 	config_load openmptcprouter
 	config_foreach enable_pihole server
 	#config_foreach delete_server_default_route server
-	[ "$nbserver" = "$piholeenabled" ] && /etc/init.d/openmptcprouter-vps set_pihole 2>&1 >/dev/null
+	[ "$nbserver" = "$piholeenabled" ] && /etc/init.d/openmptcprouter-vps set_pihole >/dev/null 2>&1
 	#ubus call network reload
 	exit 0
 fi
@@ -863,12 +863,12 @@ fi
 
 if [ "$multipath_config" = "master" ]; then
 	#if ([ "$default_gw" != "$OMR_TRACKER_DEVICE_GATEWAY" ] || [ "$default_gw" = "" ]) && [ "$OMR_TRACKER_DEVICE_GATEWAY" != "" ] && ([ "$(uci -q get openmptcprouter.settings.master)" != "balancing" ] || [ "$(uci -q get openmptcprouter.settings.vpn)" = "mlvpn" ]); then
-	if ([ "$default_gw" != "$OMR_TRACKER_DEVICE_GATEWAY" ] || [ "$default_gw" = "" ]) && [ "$OMR_TRACKER_DEVICE_GATEWAY" != "" ] && [ "$(uci -q get openmptcprouter.settings.master)" != "balancing" ]; then
+	if { [ "$default_gw" != "$OMR_TRACKER_DEVICE_GATEWAY" ] || [ "$default_gw" = "" ]; } && [ "$OMR_TRACKER_DEVICE_GATEWAY" != "" ] && [ "$(uci -q get openmptcprouter.settings.master)" != "balancing" ]; then
 		omrvpn_intf=$(uci -q get "network.omrvpn.device" || echo "tun0")
 		[ -z "$omrvpn_intf" ] && omrvpn_intf=$(uci -q get "network.omrvpn.ifname" || echo "tun0")
 		if [ -n "$omrvpn_intf" ] && [ "$(ip route show default metric 0 | awk '/default/ {print $5}' | grep $omrvpn_intf)" = "" ] && [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ]; then
 			_log "Master up : Replace default route by $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE"
-			ip route replace default scope global metric 1 via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE $initcwrwnd 2>&1 >/dev/null
+			ip route replace default scope global metric 1 via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE $initcwrwnd >/dev/null 2>&1
 		fi
 		config_load openmptcprouter
 		#if [ "$(uci -q get openmptcprouter.settings.master)" = "balancing" ]; then
@@ -877,14 +877,14 @@ if [ "$multipath_config" = "master" ]; then
 			config_foreach set_server_default_route server
 			#config_foreach set_server_default_route6 server
 		fi
-		ip route flush cache 2>&1 >/dev/null
+		ip route flush cache >/dev/null 2>&1
 	fi
-	if ([ "$default_gw6" != "$OMR_TRACKER_DEVICE_GATEWAY6" ] || [ "$default_gw6" = "" ]) && [ "$OMR_TRACKER_DEVICE_GATEWAY6" != "" ] && [ "$(uci -q get openmptcprouter.settings.master)" != "balancing" ]; then
+	if { [ "$default_gw6" != "$OMR_TRACKER_DEVICE_GATEWAY6" ] || [ "$default_gw6" = "" ]; } && [ "$OMR_TRACKER_DEVICE_GATEWAY6" != "" ] && [ "$(uci -q get openmptcprouter.settings.master)" != "balancing" ]; then
 		omrvpn_intf=$(uci -q get "network.omrvpn.device" || echo "tun0")
 		[ -z "$omrvpn_intf" ] && omrvpn_intf=$(uci -q get "network.omrvpn.ifname" || echo "tun0")
 		if [ -n "$omrvpn_intf" ] && [ "$(ip route show default | awk '/default/ {print $5}' | grep $omrvpn_intf)" = "" ] && [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ]; then
 			_log "Master up : Replace default route by $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE"
-			ip -6 route replace default scope global nexthop via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE 2>&1 >/dev/null
+			ip -6 route replace default scope global nexthop via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE >/dev/null 2>&1
 		fi
 		config_load openmptcprouter
 		#if [ "$(uci -q get openmptcprouter.settings.master)" = "balancing" ]; then
@@ -893,10 +893,11 @@ if [ "$multipath_config" = "master" ]; then
 			#config_foreach set_server_default_route server
 			config_foreach set_server_default_route6 server
 		fi
-		ip -6 route flush cache 2>&1 >/dev/null
+		ip -6 route flush cache >/dev/null 2>&1
 	fi
 	#if [ "$(uci -q get openmptcprouter.settings.master)" = "balancing" ] && [ "$(ip route show default | grep weight)" = "" ] && [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ] && [ "$(uci -q get openmptcprouter.settings.vpn)" != "mlvpn" ]; then
-	if [ "$(uci -q get openmptcprouter.settings.master)" = "balancing" ] && (([ -n "$OMR_TRACKER_DEVICE_IP" ] && [ "$(ip route show default | grep weight)" = "" ]) || ([ -n "$OMR_TRACKER_DEVICE_IP6" ] && [ "$(ip -6 route show default | grep weight)" = "" ])) && [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ]; then
+	if [ "$(uci -q get openmptcprouter.settings.master)" = "balancing" ] && 
+	{ { [ -n "$OMR_TRACKER_DEVICE_IP" ] && [ "$(ip route show default | grep weight)" = "" ]; } || { [ -n "$OMR_TRACKER_DEVICE_IP6" ] && [ "$(ip -6 route show default | grep weight)" = "" ]; }; } && [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ]; then
 		omrvpn_intf=$(uci -q get "network.omrvpn.device" || echo "tun0")
 		[ -z "$omrvpn_intf" ] && omrvpn_intf=$(uci -q get "network.omrvpn.ifname" || echo "tun0")
 		if [ -n "$omrvpn_intf" ] && [ -n "$OMR_TRACKER_DEVICE_IP" ] && [ "$(ip route show default metric 0 | awk '/default/ {print $5}' | grep $omrvpn_intf)" = "" ]; then
@@ -910,29 +911,29 @@ if [ "$multipath_config" = "master" ]; then
 			config_foreach set_route_balancing interface
 			#config_foreach set_route_balancing6 interface
 			[ -n "$routesbalancing" ] && {
-				([ "$nbintf" -gt "1" ] && [ "$(ip r show default metric 1 | tr -d '\t' | tr -d '\n' | sed 's/ *$//')" != "default via $routesbalancing" ] && [ "$(ip r show default metric 1 | tr -d '\t' | tr -d '\n' | sed 's/ *$//')" != "default $routesbalancing" ]) || ([ "$nbintf" = "1" ] && ([ "$(ip r show default metric 1 | grep $OMR_TRACKER_DEVICE)" = "" ] || ([ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.vpn)" = "1" ])) && [ -n "$OMR_TRACKER_DEVICE_IP" ]) && {
+				{ [ "$nbintf" -gt "1" ] && [ "$(ip r show default metric 1 | tr -d '\t' | tr -d '\n' | sed 's/ *$//')" != "default via $routesbalancing" ] && [ "$(ip r show default metric 1 | tr -d '\t' | tr -d '\n' | sed 's/ *$//')" != "default $routesbalancing" ]; } || { [ "$nbintf" = "1" ] && { [ "$(ip r show default metric 1 | grep $OMR_TRACKER_DEVICE)" = "" ] || { [ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.vpn)" = "1" ]; }; } && [ -n "$OMR_TRACKER_DEVICE_IP" ]; } && {
 					_log "Change in routes, set ip route replace default scope global $routesbalancing (omrvpn_intf: $omrvpn_intf)"
 					[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Current route: $(ip r)"
-					ip route replace default scope global metric 1 $routesbalancing 2>&1 >/dev/null
+					ip route replace default scope global metric 1 $routesbalancing >/dev/null 2>&1
 					[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "New route: $(ip r)"
 				}
 			}
 			#[ -n "$routesbalancing6" ] && {
 			#	([ "$nbintf6" -gt "1" ] && [ "$(ip -6 r show default metric 1 | tr -d '\t' | tr -d '\n')" != "default via $routesbalancing6 " ]) || ([ "$nbintf6" = "1" ] && [ "$(ip -6 r show default metric 1 | grep $OMR_TRACKER_DEVICE)" = "" ] && [ -n "$OMR_TRACKER_DEVICE_IP6" ]) && {
 			#		_log "Set ip -6 route replace default scope global metric 1 $routesbalancing6"
-			#		ip -6 route replace default scope global metric 1 $routesbalancing6 2>&1 >/dev/null
+			#		ip -6 route replace default scope global metric 1 $routesbalancing6 >/dev/null 2>&1
 			#	}
 			#}
 			[ -n "$routesbalancingbackup" ] && {
-				([ "$nbintfb" -gt "1" ] && [ "$(ip r show default metric 999 | tr -d '\t' | tr -d '\n')" != "default via $routesbalancingbackup " ] && [ "$(ip r show default metric 999 | tr -d '\t' | tr -d '\n')" != "default $routesbalancingbackup " ]) || ([ "$nbintf" = "1" ] && ([ "$(ip r show default metric 999 | grep $OMR_TRACKER_DEVICE)" = "" ] || ([ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.vpn)" = "1" ])) && [ -n "$OMR_TRACKER_DEVICE_IP" ]) && {
+				{ [ "$nbintfb" -gt "1" ] && [ "$(ip r show default metric 999 | tr -d '\t' | tr -d '\n')" != "default via $routesbalancingbackup " ] && [ "$(ip r show default metric 999 | tr -d '\t' | tr -d '\n')" != "default $routesbalancingbackup " ]; } || { [ "$nbintf" = "1" ] && { [ "$(ip r show default metric 999 | grep $OMR_TRACKER_DEVICE)" = "" ] || { [ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.vpn)" = "1" ]; }; } && [ -n "$OMR_TRACKER_DEVICE_IP" ]; } && {
 					_log "Set backup ip route replace default scope global metric 999 $routesbalancingbackup"
-					ip route replace default scope global metric 999 $routesbalancingbackup 2>&1 >/dev/null
+					ip route replace default scope global metric 999 $routesbalancingbackup >/dev/null 2>&1
 				}
 			}
 			#[ -n "$routesbalancingbackup6" ] && {
 			#	([ "$nbintfb6" -gt "1" ] && [ "$(ip -6 r show default metric 999 | tr -d '\t' | tr -d '\n')" != "default via $routesbalancingbackup6 " ]) || ([ "$nbintf6" = "1" ] && [ "$(ip -6 r show default metric 999 | grep $OMR_TRACKER_DEVICE)" = "" ] && [ -n "$OMR_TRACKER_DEVICE_IP6" ]) && {
 			#		_log "Set backup ip -6 route replace default scope global $routesbalancingbackup6"
-			#		ip -6 route replace default scope global metric 999 $routesbalancingbackup6 2>&1 >/dev/null
+			#		ip -6 route replace default scope global metric 999 $routesbalancingbackup6 >/dev/null 2>&1
 			#	}
 			#}
 		elif [ -n "$omrvpn_intf" ] && [ -n "$OMR_TRACKER_DEVICE_IP6" ] && [ "$(ip -6 route show default | grep -v metric | awk '/default/ {print $5}' | grep $omrvpn_intf)" = "" ]; then
@@ -943,30 +944,30 @@ if [ "$multipath_config" = "master" ]; then
 			config_load network
 			config_foreach set_route_balancing6 interface
 			[ -n "$routesbalancing6" ] && {
-				([ "$nbintf6" -gt "1" ] && [ "$(ip -6 r show default metric 1 | tr -d '\t' | tr -d '\n')" != "default via $routesbalancing6 " ] && [ "$(ip -6 r show default metric 1 | tr -d '\t' | tr -d '\n')" != "default $routesbalancing6 " ]) || ([ "$nbintf6" = "1" ] && [ "$(ip -6 r show default metric 1 | grep $OMR_TRACKER_DEVICE)" = "" ] && [ "$(ip -6 r show default metric 1 | grep omr6in4)" = "" ] && [ -n "$OMR_TRACKER_DEVICE_IP6" ]) && {
+				{ [ "$nbintf6" -gt "1" ] && [ "$(ip -6 r show default metric 1 | tr -d '\t' | tr -d '\n')" != "default via $routesbalancing6 " ] && [ "$(ip -6 r show default metric 1 | tr -d '\t' | tr -d '\n')" != "default $routesbalancing6 " ]; } || { [ "$nbintf6" = "1" ] && [ "$(ip -6 r show default metric 1 | grep $OMR_TRACKER_DEVICE)" = "" ] && [ "$(ip -6 r show default metric 1 | grep omr6in4)" = "" ] && [ -n "$OMR_TRACKER_DEVICE_IP6" ]; } && {
 					_log "Set ip -6 route replace default scope global metric 1 $routesbalancing6"
-					ip -6 route replace default scope global metric 1 $routesbalancing6 2>&1 >/dev/null
+					ip -6 route replace default scope global metric 1 $routesbalancing6 >/dev/null 2>&1
 				}
 			}
 			[ -n "$routesbalancingbackup6" ] && {
-				([ "$nbintfb6" -gt "1" ] && [ "$(ip -6 r show default metric 999 | tr -d '\t' | tr -d '\n')" != "default via $routesbalancingbackup6 " ] && [ "$(ip -6 r show default metric 999 | tr -d '\t' | tr -d '\n')" != "default $routesbalancingbackup6 " ]) || ([ "$nbintf6" = "1" ] && [ "$(ip -6 r show default metric 999 | grep $OMR_TRACKER_DEVICE)" = "" ] && [ -n "$OMR_TRACKER_DEVICE_IP6" ]) && {
+				{ [ "$nbintfb6" -gt "1" ] && [ "$(ip -6 r show default metric 999 | tr -d '\t' | tr -d '\n')" != "default via $routesbalancingbackup6 " ] && [ "$(ip -6 r show default metric 999 | tr -d '\t' | tr -d '\n')" != "default $routesbalancingbackup6 " ]; } || { [ "$nbintf6" = "1" ] && [ "$(ip -6 r show default metric 999 | grep $OMR_TRACKER_DEVICE)" = "" ] && [ -n "$OMR_TRACKER_DEVICE_IP6" ]; } && {
 					_log "Set backup ip -6 route replace default scope global $routesbalancingbackup6"
-					ip -6 route replace default scope global metric 999 $routesbalancingbackup6 2>&1 >/dev/null
+					ip -6 route replace default scope global metric 999 $routesbalancingbackup6 >/dev/null 2>&1
 				}
 			}
 		fi
-		#ip route flush cache 2>&1 >/dev/null
-		#ip -6 route flush cache 2>&1 >/dev/null
+		#ip route flush cache >/dev/null 2>&1
+		#ip -6 route flush cache >/dev/null 2>&1
 	fi
 	if [ -n "$OMR_TRACKER_DEVICE_GATEWAY" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ "$(ip r show table 991337)" != "default via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE " ]; then
-		ip route replace default via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE table 991337 $initcwrwnd 2>&1 >/dev/null
-		#ip route flush cache 2>&1 >/dev/null
+		ip route replace default via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE table 991337 $initcwrwnd >/dev/null 2>&1
+		#ip route flush cache >/dev/null 2>&1
 	fi
 	if [ -n "$OMR_TRACKER_DEVICE_GATEWAY6" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ "$(ip -6 r show table 991337)" != "default via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE " ]; then
-		ip -6 route replace default via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE table 991337 $initcwrwnd 2>&1 >/dev/null
-		#ip -6 route flush cache 2>&1 >/dev/null
+		ip -6 route replace default via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE table 991337 $initcwrwnd >/dev/null 2>&1
+		#ip -6 route flush cache >/dev/null 2>&1
 	fi
-	if ([ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc)" = "" ]) || [ $(($(date +"%s") + $((10 + RANDOM % 10)) - $(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc))) -gt 3600 ] || [ "$(uci -q show openmptcprouter | grep get_config=\'1\')" != "" ] || [ "$(uci -q show openmptcprouter | grep admin_error=\'1\')" != "" ]; then
+	if { [ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc)" = "" ]; } || [ $(($(date +"%s") + $((10 + RANDOM % 10)) - $(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc))) -gt 3600 ] || [ "$(uci -q show openmptcprouter | grep get_config=\'1\')" != "" ] || [ "$(uci -q show openmptcprouter | grep admin_error=\'1\')" != "" ]; then
 		[ "$(pgrep -f openmptcprouter-vps)" = "" ] && {
 			/etc/init.d/openmptcprouter-vps restart >/dev/null 2>&1 &
 			uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.lc=$(date +"%s")
@@ -987,7 +988,7 @@ if [ -n "$OMR_TRACKER_DEVICE_IP" ] && [ -n "$OMR_TRACKER_DEVICE_GATEWAY" ]; then
 	if [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ] && [ -n "$OMR_TRACKER_DEVICE_GATEWAY" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ "$(ip r show dev $OMR_TRACKER_DEVICE | grep default)" = "" ] && [ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get network.$OMR_TRACKER_INTERFACE.metric)" != "" ]; then
 		_log "Interface route not yet set, set route ip r add default via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE metric $(uci -q get network.$OMR_TRACKER_INTERFACE.metric)"
 		ip r add default via $OMR_TRACKER_DEVICE_GATEWAY dev $OMR_TRACKER_DEVICE metric $(uci -q get network.$OMR_TRACKER_INTERFACE.metric) >/dev/null 2>&1
-		ip route flush cache 2>&1 >/dev/null
+		ip route flush cache >/dev/null 2>&1
 	fi
 fi
 if [ -n "$OMR_TRACKER_DEVICE_IP6" ] && [ -n "$OMR_TRACKER_DEVICE_GATEWAY6" ]; then
@@ -1000,11 +1001,11 @@ if [ -n "$OMR_TRACKER_DEVICE_IP6" ] && [ -n "$OMR_TRACKER_DEVICE_GATEWAY6" ]; th
 	fi
 	if [ "$(uci -q get openmptcprouter.settings.defaultgw)" != "0" ] && [ -n "$OMR_TRACKER_DEVICE_GATEWAY6" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ "$(ip -6 r show dev $OMR_TRACKER_DEVICE | grep default)" = "" ] && [ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get network.$OMR_TRACKER_INTERFACE.metric)" != "" ]; then
 		ip -6 r replace default via $OMR_TRACKER_DEVICE_GATEWAY6 dev $OMR_TRACKER_DEVICE metric 6$(uci -q get network.$OMR_TRACKER_INTERFACE.metric) >/dev/null 2>&1
-		ip -6 route flush cache 2>&1 >/dev/null
+		ip -6 route flush cache >/dev/null 2>&1
 	fi
 fi
 
-if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$multipath_config" = "on" ] || [ "$multipath_config" = "backup" ]); then
+if [ -n "$OMR_TRACKER_INTERFACE" ] && { [ "$multipath_config" = "on" ] || [ "$multipath_config" = "backup" ]; }; then
 	download="$(uci -q get network.$OMR_TRACKER_INTERFACE.downloadspeed)"
 	[ -z "$download" ] && download="$(uci -q get sqm.$OMR_TRACKER_INTERFACE.download)"
 	upload="$(uci -q get network.$OMR_TRACKER_INTERFACE.uploadspeed)"
@@ -1039,15 +1040,15 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$multipath_config" = "on" ] || [ "$mul
 				serverip="$(resolveip -6 -t 5 $serverip | head -n 1 | tr -d '\n')"
 				if [ "$download" != "0" ] && [ "$download" != "" ] && [ "$upload" != "0" ] && [ "$upload" != "" ]; then
 					if [ "$(uci -q get glorytun-udp.vpn.rateauto)" = "1" ]; then
-						glorytun-udp path addr $OMR_TRACKER_DEVICE_IP6 to addr $serverip port ${gtudp_port} dev ${gtudp_dev} set up rate auto tx $((upload*1000)) rx $((download*1000)) pref 1 > /dev/null 2>&1
+						glorytun-udp path addr "$OMR_TRACKER_DEVICE_IP6" to addr "$serverip" port ${gtudp_port} dev ${gtudp_dev} set up rate auto tx $((upload*1000)) rx $((download*1000)) pref 1 > /dev/null 2>&1
 					else
-						glorytun-udp path addr $OMR_TRACKER_DEVICE_IP6 to addr $serverip port ${gtudp_port} dev ${gtudp_dev} set up rate fixed tx $((upload*1000)) rx $((download*1000)) pref 1 > /dev/null 2>&1
+						glorytun-udp path addr "$OMR_TRACKER_DEVICE_IP6" to addr "$serverip" port ${gtudp_port} dev ${gtudp_dev} set up rate fixed tx $((upload*1000)) rx $((download*1000)) pref 1 > /dev/null 2>&1
 					fi
 				else
 					if [ "$(uci -q get glorytun-udp.vpn.rateauto)" = "1" ]; then
-						glorytun-udp path addr $OMR_TRACKER_DEVICE_IP6 to addr $serverip port ${gtudp_port} dev ${gtudp_dev} set up rate auto tx 12500000 rx 12500000 pref 1 > /dev/null 2>&1
+						glorytun-udp path addr "$OMR_TRACKER_DEVICE_IP6" to addr "$serverip" port ${gtudp_port} dev ${gtudp_dev} set up rate auto tx 12500000 rx 12500000 pref 1 > /dev/null 2>&1
 					else
-						glorytun-udp path addr $OMR_TRACKER_DEVICE_IP6 to addr $serverip port ${gtudp_port} dev ${gtudp_dev} set up rate fixed tx 12500000 rx 12500000 pref 1 > /dev/null 2>&1
+						glorytun-udp path addr "$OMR_TRACKER_DEVICE_IP6" to addr "$serverip" port ${gtudp_port} dev ${gtudp_dev} set up rate fixed tx 12500000 rx 12500000 pref 1 > /dev/null 2>&1
 					fi
 				fi
 			fi
diff --git a/omr-tracker/files/usr/share/omr/post-tracking.d/020-status b/omr-tracker/files/usr/share/omr/post-tracking.d/020-status
index 5c86b0cb9..2584f7d30 100755
--- a/omr-tracker/files/usr/share/omr/post-tracking.d/020-status
+++ b/omr-tracker/files/usr/share/omr/post-tracking.d/020-status
@@ -1,3 +1,4 @@
+#!/bin/bash
 #
 # Copyright (C) 2018-2023 Ycarus (Yannick Chabanois) <ycarus@zugaina.org> for OpenMPTCProuter
 #
@@ -11,10 +12,10 @@ interface_up=$(ifstatus "$OMR_TRACKER_INTERFACE" 2>/dev/null | jsonfilter -q -e
 [ "$interface_up" != "true" ] && exit 0
 
 # Save wan settings for status page
-if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc)" = "" ] || [ $(($(date +"%s") + $((30 + RANDOM % 10)) - $(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc))) -gt 3600 ] || [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.state)" = "down" ]); then
+if [ -n "$OMR_TRACKER_INTERFACE" ] && { [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc)" = "" ] || [ $(($(date +"%s") + $((30 + RANDOM % 10)) - $(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc))) -gt 3600 ] || [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.state)" = "down" ]; }; then
 	[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Get status and settings for $OMR_TRACKER_INTERFACE..."
-	local ipaddr=""
-	local ip6addr=""
+	ipaddr=""
+	ip6addr=""
 	if [ "$(uci -q get openmptcprouter.settings.external_check)" != "0" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.vpn)" != "1" ]; then
 		[ -n "$OMR_TRACKER_DEVICE_IP" ] && ipaddr="$(omr-ip-intf $OMR_TRACKER_DEVICE)"
 		[ -n "$OMR_TRACKER_DEVICE_IP6" ] && ip6addr="$(omr-ip6-intf $OMR_TRACKER_DEVICE)"
@@ -24,11 +25,11 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 	fi
 	[ -n "$ipaddr" ] && {
 		# Check if we can get a IPv6 address, if yes enable RA else disable
-		#local check_ipv6_website="$(uci -q get openmptcprouter.settings.check_ipv6_website)"
+		#check_ipv6_website="$(uci -q get openmptcprouter.settings.check_ipv6_website)"
 		#[ -z "$check_ipv6_website" ] && check_ipv6_website="http://ipv6.openmptcprouter.com/"
-		#local ip6addr="$(curl -s -6 -m 2 $check_ipv6_website)"
+		#ip6addr="$(curl -s -6 -m 2 $check_ipv6_website)"
 		#[ -z "$ip6addr" ] && {
-		#	local ip6addr="$(curl -s -6 -m 2 http://ifconfig.me/)"
+		#	ip6addr="$(curl -s -6 -m 2 http://ifconfig.me/)"
 		#}
 		#if [ "$(uci -q get openmptcprouter.settings.ipv6_disable)" = "0" ]; then
 		#	if [ -n "$ip6addr" ] && [ "$(uci -q get dhcp.lan.ra_default)" != 1 ]; then
@@ -47,16 +48,16 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 		#	fi
 		#fi
 		if [ "$(uci -q get openmptcprouter.settings.external_check)" != "0" ]; then
-			#local asn="$(wget -4 -qO- -T 4 http://api.iptoasn.com/v1/as/ip/$ipaddr | jsonfilter -q -e '@.as_description')"
+			#asn="$(wget -4 -qO- -T 4 http://api.iptoasn.com/v1/as/ip/$ipaddr | jsonfilter -q -e '@.as_description')"
 			#[ -z "$asn" ] && {
-			local asn="$(timeout 2 whois $ipaddr 2>/dev/null | grep -m 1 -i 'netname' | awk '{print $2}')"
+			asn="$(timeout 2 whois $ipaddr 2>/dev/null | grep -m 1 -i 'netname' | awk '{print $2}')"
 			#}
 		fi
 		[ -z "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE)" ] && {
 			uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE=interface
 		}
 		if [ "$(uci -q get openmptcprouter.latest_versions.lc)" = "" ] || [ $(($(date +"%s") - $(uci -q get openmptcprouter.latest_versions.lc))) -gt 3600 ]; then
-			local latestversions="$(curl -4 -s -m 3 https://www.openmptcprouter.com/version/version.json)"
+			latestversions="$(curl -4 -s -m 3 https://www.openmptcprouter.com/version/version.json)"
 			[ -n "$latestversions" ] && {
 				uci -q set openmptcprouter.latest_versions=latest_versions
 				uci -q set openmptcprouter.latest_versions.omr=$(echo $latestversions | jsonfilter -q -e '@.omr')-$(ubus call system board | jsonfilter -e '@.kernel' | cut -d'.' -f1,2)
@@ -74,7 +75,7 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 			uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.publicip="$ipaddr"
 			/etc/init.d/mptcp enabled && {
 				_log "Reload MPTCP for $OMR_TRACKER_DEVICE"
-				/etc/init.d/mptcp reload "$OMR_TRACKER_DEVICE" 2>&1 >/dev/null
+				/etc/init.d/mptcp reload "$OMR_TRACKER_DEVICE" >/dev/null 2>&1
 			}
 		}
 		[ -n "$OMR_TRACKER_LATENCY" ] && uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.latency="$OMR_TRACKER_LATENCY"
@@ -83,8 +84,8 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 		}
 
 		# Routing loop detection
-		local lanip="$(uci -q get network.lan.ipaddr)"
-		local masterip
+		lanip="$(uci -q get network.lan.ipaddr)"
+		masterip
 		get_master_ip() {
 			if [ -n "$1" ] && [ "$(uci -q get openmptcprouter.$1.multipath)" = "master" ]; then
 				masterip="$(uci -q get openmptcprouter.$1.publicip)"
@@ -96,7 +97,7 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 			loop=0
 			routingloop() {
 				vpsip=""
-				[ -n "$1"] && vpsip="$(uci -q get openmptcprouter.$1.ip)"
+				[ -n "$1" ] && vpsip="$(uci -q get openmptcprouter.$1.ip)"
 				if [ -n "$vpsip" ] && [ "$(omr-routing-loop $vpsip $lanip $OMR_TRACKER_DEVICE)" = "detected" ]; then
 					loop=1
 				fi
@@ -112,10 +113,10 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 			uci -q delete openmptcprouter.$OMR_TRACKER_INTERFACE.loop
 		fi
 
-		local omrtracebox
+		omrtracebox=""
 		traceboxmtutest() {
 			omr_tracebox_mtu() {
-				local serverip=$1
+				serverip=$1
 				[ "$serverip" != "${1#*[0-9].[0-9]}" ] && serverip=""
 				[ -n "$serverip" ] && [ "$serverip" != "127.0.0.1" ] && [ "$(pgrep -f tracebox)" = "" ] && [ "$(uci -q get openmptcprouter.settings.tracebox)" != "0" ] && {
 					omrtracebox="$(omr-tracebox-mptcp $serverip $OMR_TRACKER_DEVICE)"
@@ -132,8 +133,8 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 							ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
 						}
 					elif [ -n "$OMR_TRACKER_DEVICE_IP" ]; then
-						[ -n "$serverip" ] && [ "$serverip" != "127.0.0.1" ] && {
-							local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP $serverip)
+						if [ -n "$serverip" ] && [ "$serverip" != "127.0.0.1" ]; then
+							mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP $serverip)
 							[ -n "$mtu" ] && [ "$mtu" != "$(ip --json link show dev $OMR_TRACKER_DEVICE | jsonfilter -e '@[0].mtu' | tr -d '\n')" ] && {
 								mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP $serverip)
 								[ -n "$mtu" ] && [ "$mtu" != "$(ip --json link show dev $OMR_TRACKER_DEVICE | jsonfilter -e '@[0].mtu' | tr -d '\n')" ] && {
@@ -141,8 +142,8 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 									ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
 								}
 							}
-						} || {
-							local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP 1.1.1.1)
+						else
+							mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP 1.1.1.1)
 							[ -n "$mtu" ] && [ "$mtu" != "$(ip --json link show dev $OMR_TRACKER_DEVICE | jsonfilter -e '@[0].mtu' | tr -d '\n')" ] && {
 								mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP $serverip)
 								[ -n "$mtu" ] && [ "$mtu" != "$(ip --json link show dev $OMR_TRACKER_DEVICE | jsonfilter -e '@[0].mtu' | tr -d '\n')" ] && {
@@ -150,7 +151,7 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 									ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
 								}
 							}
-						}
+						fi
 					fi
 				fi
 			}
@@ -167,13 +168,13 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 	}
 	[ -n "$ip6addr" ] && {
 		if [ "$(uci -q get openmptcprouter.settings.external_check)" != "0" ]; then
-			local asn="$(whois $ip6addr 2>/dev/null | grep -m 1 -i 'netname' | awk '{print $2}')"
+			asn="$(whois $ip6addr 2>/dev/null | grep -m 1 -i 'netname' | awk '{print $2}')"
 		fi
 		[ -z "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE)" ] && {
 			uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE=interface
 		}
 		if [ "$(uci -q get openmptcprouter.latest_versions.lc)" = "" ] || [ $(($(date +"%s") - $(uci -q get openmptcprouter.latest_versions.lc))) -gt 3600 ]; then
-			local latestversions="$(curl -6 -s -m 3 https://www.openmptcprouter.com/version/version.json)"
+			latestversions="$(curl -6 -s -m 3 https://www.openmptcprouter.com/version/version.json)"
 			[ -n "$latestversions" ] && {
 				uci -q set openmptcprouter.latest_versions=latest_versions
 				uci -q set openmptcprouter.latest_versions.omr=$(echo $latestversions | jsonfilter -q -e '@.omr')
@@ -185,7 +186,7 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 			_log "New public ip detected for $OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE): $ip6addr"
 			/etc/init.d/mptcp enabled && {
 				_log "Reload MPTCP for $OMR_TRACKER_DEVICE"
-				/etc/init.d/mptcp reload "$OMR_TRACKER_DEVICE" 2>&1 >/dev/null
+				/etc/init.d/mptcp reload "$OMR_TRACKER_DEVICE" >/dev/null 2>&1
 			}
 			uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.publicip="$ip6addr"
 		}
@@ -193,7 +194,7 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 		[ -n "$asn" ] && {
 			uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.asn="$asn"
 		}
-		local omrtracebox
+		omrtracebox=""
 		traceboxmtutest() {
 			omr_tracebox_mtu() {
 				local serverip=$1
@@ -212,19 +213,19 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 							ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
 						}
 					elif [ -n "$OMR_TRACKER_DEVICE_IP" ]; then
-						[ -n "$serverip" ] && [ "$serverip" != "127.0.0.1" ] && {
-							local mtu=$(omr-mtu6 $OMR_TRACKER_DEVICE_IP6 $serverip)
+						if [ -n "$serverip" ] && [ "$serverip" != "127.0.0.1" ]; then
+							mtu=$(omr-mtu6 $OMR_TRACKER_DEVICE_IP6 $serverip)
 							[ -n "$mtu" ] && {
 								uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.mtu=$mtu
 								ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
 							}
-						} || {
-							local mtu=$(omr-mtu6 $OMR_TRACKER_DEVICE_IP6 2606:4700:4700::1111)
+						else
+							mtu=$(omr-mtu6 $OMR_TRACKER_DEVICE_IP6 2606:4700:4700::1111)
 							[ -n "$mtu" ] && {
 								uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.mtu=$mtu
 								ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
 							}
-						}
+						fi
 					fi
 				fi
 			}
@@ -236,7 +237,7 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 		uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.lc=$(date +"%s")
 	}
 	if [ "$(uci -q get shadowsocks-libev.sss0.server)" != "" ] && [ "$(uci -q get openmptcprouter.settings.external_check)" = "0" ]; then
-		if ping -B -I $OMR_TRACKER_DEVICE -c 1 $(uci -q get shadowsocks-libev.sss0.server) 2>&1 >/dev/null; then
+		if ping -B -I $OMR_TRACKER_DEVICE -c 1 $(uci -q get shadowsocks-libev.sss0.server) >/dev/null 2>&1; then
 			uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.lc=$(date +"%s")
 		fi
 	fi
@@ -266,7 +267,7 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && ([ "$(uci -q get openmptcprouter.$OMR_TRAC
 	else
 		[ "$(uci -q get openmptcprouter.settings.debug)" = "true" ] && _log "Get status and settings for $OMR_TRACKER_INTERFACE... Done"
 		[ -n "$(uci -q changes openmptcprouter)" ] && uci -q commit openmptcprouter
-		if [ "$(pgrep -f openmptcprouter-vps)" = "" ] && ( [ "$(uci -q get openmptcprouter.settings.apilc)" = "" ] || [ $(($(date +"%s") - $(uci -q get openmptcprouter.settings.apilc))) -gt 3600 ] ); then
+		if [ "$(pgrep -f openmptcprouter-vps)" = "" ] && { [ "$(uci -q get openmptcprouter.settings.apilc)" = "" ] || [ $(($(date +"%s") - $(uci -q get openmptcprouter.settings.apilc))) -gt 3600 ]; }; then
 			_log "Check API configuration..."
 			/etc/init.d/openmptcprouter-vps restart >/dev/null 2>&1 &
 			uci -q set openmptcprouter.settings.apilc=$(date +"%s")
diff --git a/omr-tracker/files/usr/share/omr/post-tracking.d/021-latencies b/omr-tracker/files/usr/share/omr/post-tracking.d/021-latencies
index f89d70288..c2f51da37 100755
--- a/omr-tracker/files/usr/share/omr/post-tracking.d/021-latencies
+++ b/omr-tracker/files/usr/share/omr/post-tracking.d/021-latencies
@@ -1,3 +1,4 @@
+#!/bin/sh
 #
 # Copyright (C) 2018-2023 Ycarus (Yannick Chabanois) <ycarus@zugaina.org> for OpenMPTCProuter
 #
@@ -15,15 +16,15 @@ interface_up=$(ifstatus "$OMR_TRACKER_INTERFACE" 2>/dev/null | jsonfilter -q -e
 	uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.latency="$OMR_TRACKER_LATENCY"
 	#[ -z "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.latency_max)" ] && uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.latency_max="$OMR_TRACKER_LATENCY"
 	#[ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.latency_max)" -lt "$OMR_TRACKER_LATENCY" ] && uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.latency_max="$OMR_TRACKER_LATENCY"
-	if [ "$multipath_config" = "on" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.multipath)" != "master" ] && ([ "$(uci -q get openmptcprouter.settings.master)" = "dynamic" ] || ( ( [ "$(uci -q get openmptcprouter.settings.master)" = "change" ] || [ "$(uci -q get openmptcprouter.settings.master)" = "" ] ) && [ "$(uci -q get openmptcprouter.settings.master_lcintf | grep $OMR_TRACKER_INTERFACE)" = "" ] ) ); then
+	if [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.multipath)" = "on" ] && { [ "$(uci -q get openmptcprouter.settings.master)" = "dynamic" ] || { { [ "$(uci -q get openmptcprouter.settings.master)" = "change" ] || [ "$(uci -q get openmptcprouter.settings.master)" = "" ]; } && [ "$(uci -q get openmptcprouter.settings.master_lcintf | grep $OMR_TRACKER_INTERFACE)" = "" ]; }; }; then
 		masterintf="$(uci -q show openmptcprouter | grep -m 1 multipath=\'master\' | cut -d'.' -f2)"
 		[ -z "$masterintf" ] && masterintf="$(uci -q show network | grep -m 1 multipath=\'master\' | cut -d'.' -f2)"
 		masterlatency="$(uci -q get openmptcprouter.$masterintf.latency | tr -d '\n')"
-		if [ -z "$masterlatency" ] || ([ -n "$masterintf" ] && [ "$(uci -q get openmptcprouter.$masterintf.state)" = "down" ]); then
+		if [ -z "$masterlatency" ] || { [ -n "$masterintf" ] && [ "$(uci -q get openmptcprouter.$masterintf.state)" = "down" ]; }; then
 			masterlatency=1000
 		fi
-		if [ -n "$masterintf" ] && ([ "$masterlatency" != "" ] || [ "$(uci -q get openmptcprouter.$masterintf.state)" = "down" ]); then
-			if ( ( [ "$(uci -q get openmptcprouter.settings.master)" = "change" ] || [ "$(uci -q get openmptcprouter.settings.master)" = "" ] ) && [ "$OMR_TRACKER_LATENCY" -lt $(awk "BEGIN {printf \"%i\",${masterlatency}/1.5}") ] ) || ( [ "$(uci -q get openmptcprouter.settings.master)" = "dynamic" ] && [ "$OMR_TRACKER_LATENCY" -lt "$((masterlatency/2))" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.latency_previous)" -lt "$((masterlatency/2))" ] ); then
+		if [ -n "$masterintf" ] && { [ "$masterlatency" != "" ] || [ "$(uci -q get openmptcprouter.$masterintf.state)" = "down" ]; }; then
+			if { { [ "$(uci -q get openmptcprouter.settings.master)" = "change" ] || [ "$(uci -q get openmptcprouter.settings.master)" = "" ]; } && [ "$OMR_TRACKER_LATENCY" -lt $(awk "BEGIN {printf \"%i\",${masterlatency}/1.5}") ]; } || { [ "$(uci -q get openmptcprouter.settings.master)" = "dynamic" ] && [ "$OMR_TRACKER_LATENCY" -lt "$((masterlatency/2))" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.latency_previous)" -lt "$((masterlatency/2))" ]; }; then
 				uci -q set network.$masterintf.multipath='on'
 				uci -q set openmptcprouter.$masterintf.multipath='on'
 				uci -q set network.$OMR_TRACKER_INTERFACE.multipath='master'
@@ -49,13 +50,13 @@ if [ -n "$OMR_TRACKER_INTERFACE" ] && [ -n "$OMR_TRACKER_DEVICE" ]; then
 	addlatency=$(uci -q get network.${OMR_TRACKER_INTERFACE}.addlatency)
 	[ -z "$addlatency" ] && addlatency="0"
 	if [ "$addlatency" = "0" ] && [ "$(tc qdisc show dev $OMR_TRACKER_DEVICE | grep delay)" != "" ]; then
-		tc qdisc del dev ${OMR_TRACKER_DEVICE} root netem 2>&1 >/dev/null
+		tc qdisc del dev ${OMR_TRACKER_DEVICE} root netem >/dev/null 2>&1
 	fi
 	if [ "$addlatency" != "0" ]; then
 		if [ "$(tc qdisc show dev $OMR_TRACKER_DEVICE | grep delay)" = "" ]; then
-			tc qdisc add dev ${OMR_TRACKER_DEVICE} root netem delay ${addlatency}ms 2>&1 >/dev/null
+			tc qdisc add dev ${OMR_TRACKER_DEVICE} root netem delay ${addlatency}ms >/dev/null 2>&1
 		elif [ "$(tc qdisc show dev $OMR_TRACKER_DEVICE | awk '/delay/ { print $10 }' | sed 's/ms//')" != "$addlatency" ]; then
-			tc qdisc replace dev ${OMR_TRACKER_DEVICE} root netem delay ${addlatency}ms 2>&1 >/dev/null
+			tc qdisc replace dev ${OMR_TRACKER_DEVICE} root netem delay ${addlatency}ms >/dev/null 2>&1
 		fi
 	fi
 fi
diff --git a/omr-tracker/files/usr/share/omr/post-tracking.d/022-speedtest b/omr-tracker/files/usr/share/omr/post-tracking.d/022-speedtest
index 3b2f2b70e..a98ddacec 100755
--- a/omr-tracker/files/usr/share/omr/post-tracking.d/022-speedtest
+++ b/omr-tracker/files/usr/share/omr/post-tracking.d/022-speedtest
@@ -1,3 +1,4 @@
+#!/bin/bash
 #
 # Copyright (C) 2018-2023 Ycarus (Yannick Chabanois) <ycarus@zugaina.org> for OpenMPTCProuter
 #