diff --git a/cmd/run.go b/cmd/run.go
index 3382e31..ddb691c 100644
--- a/cmd/run.go
+++ b/cmd/run.go
@@ -92,7 +92,7 @@ func Run(log *logrus.Logger, conf *config.Config, externGeoDataDirs []string) (e
 	// Serve tproxy TCP/UDP server util signals.
 	var listener *control.Listener
 	sigs := make(chan os.Signal, 1)
-	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGQUIT, syscall.SIGKILL, syscall.SIGILL, syscall.SIGUSR1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGQUIT, syscall.SIGKILL, syscall.SIGILL, syscall.SIGUSR1, syscall.SIGUSR2)
 	go func() {
 		readyChan := make(chan bool, 1)
 		go func() {
@@ -131,12 +131,16 @@ loop:
 				// Listening error.
 				break loop
 			}
-		case syscall.SIGHUP:
+		case syscall.SIGUSR2:
 			isSuspend = true
 			fallthrough
 		case syscall.SIGUSR1:
 			// Reload signal.
-			log.Warnln("[Reload] Received reload signal; prepare to reload")
+			if isSuspend {
+				log.Warnln("[Reload] Received suspend signal; prepare to suspend")
+			} else {
+				log.Warnln("[Reload] Received reload signal; prepare to reload")
+			}
 			sdnotify.Reloading()
 
 			// Load new config.
diff --git a/cmd/suspend.go b/cmd/suspend.go
index 844cb8b..461440b 100644
--- a/cmd/suspend.go
+++ b/cmd/suspend.go
@@ -7,8 +7,8 @@ package cmd
 
 import (
 	"fmt"
-	"github.com/spf13/cobra"
 	"github.com/daeuniverse/dae/cmd/internal"
+	"github.com/spf13/cobra"
 	"os"
 	"strconv"
 	"strings"
@@ -34,7 +34,7 @@ var (
 				cmd.Help()
 				os.Exit(1)
 			}
-			if err = syscall.Kill(pid, syscall.SIGHUP); err != nil {
+			if err = syscall.Kill(pid, syscall.SIGUSR2); err != nil {
 				fmt.Println(err)
 				os.Exit(1)
 			}
diff --git a/component/outbound/dialer/connectivity_check.go b/component/outbound/dialer/connectivity_check.go
index a2fe07e..db5b244 100644
--- a/component/outbound/dialer/connectivity_check.go
+++ b/component/outbound/dialer/connectivity_check.go
@@ -9,12 +9,12 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"github.com/daeuniverse/dae/common/consts"
+	"github.com/daeuniverse/dae/common/netutils"
 	"github.com/mzz2017/softwind/netproxy"
 	"github.com/mzz2017/softwind/pkg/fastrand"
 	"github.com/mzz2017/softwind/protocol/direct"
 	"github.com/sirupsen/logrus"
-	"github.com/daeuniverse/dae/common/consts"
-	"github.com/daeuniverse/dae/common/netutils"
 	"golang.org/x/net/dns/dnsmessage"
 	"net"
 	"net/http"
@@ -239,7 +239,7 @@ func (d *Dialer) aliveBackground() {
 				d.Log.WithFields(logrus.Fields{
 					"link":    d.TcpCheckOptionRaw.Raw,
 					"network": typ.String(),
-				}).Debugln("Skip check due to no record.")
+				}).Debugln("Skip check due to no DNS record.")
 				return false, nil
 			}
 			return d.HttpCheck(ctx, opt.Url, opt.Ip4)
@@ -260,7 +260,7 @@ func (d *Dialer) aliveBackground() {
 				d.Log.WithFields(logrus.Fields{
 					"link":    d.TcpCheckOptionRaw.Raw,
 					"network": typ.String(),
-				}).Debugln("Skip check due to no record.")
+				}).Debugln("Skip check due to no DNS record.")
 				return false, nil
 			}
 			return d.HttpCheck(ctx, opt.Url, opt.Ip6)
@@ -281,7 +281,7 @@ func (d *Dialer) aliveBackground() {
 				d.Log.WithFields(logrus.Fields{
 					"link":    d.CheckDnsOptionRaw.Raw,
 					"network": typ.String(),
-				}).Debugln("Skip check due to no record.")
+				}).Debugln("Skip check due to no DNS record.")
 				return false, nil
 			}
 			return d.DnsCheck(ctx, netip.AddrPortFrom(opt.Ip4, opt.DnsPort), true)
@@ -302,7 +302,7 @@ func (d *Dialer) aliveBackground() {
 				d.Log.WithFields(logrus.Fields{
 					"link":    d.CheckDnsOptionRaw.Raw,
 					"network": typ.String(),
-				}).Debugln("Skip check due to no record.")
+				}).Debugln("Skip check due to no DNS record.")
 				return false, nil
 			}
 			return d.DnsCheck(ctx, netip.AddrPortFrom(opt.Ip6, opt.DnsPort), true)
@@ -323,7 +323,7 @@ func (d *Dialer) aliveBackground() {
 				d.Log.WithFields(logrus.Fields{
 					"link":    d.CheckDnsOptionRaw.Raw,
 					"network": typ.String(),
-				}).Debugln("Skip check due to no record.")
+				}).Debugln("Skip check due to no DNS record.")
 				return false, nil
 			}
 			return d.DnsCheck(ctx, netip.AddrPortFrom(opt.Ip4, opt.DnsPort), false)
@@ -344,7 +344,7 @@ func (d *Dialer) aliveBackground() {
 				d.Log.WithFields(logrus.Fields{
 					"link":    d.CheckDnsOptionRaw.Raw,
 					"network": typ.String(),
-				}).Debugln("Skip check due to no record.")
+				}).Debugln("Skip check due to no DNS record.")
 				return false, nil
 			}
 			return d.DnsCheck(ctx, netip.AddrPortFrom(opt.Ip6, opt.DnsPort), false)