diff --git a/cmd/sower/socks5.go b/cmd/sower/socks5.go
index 422790c..25df5e4 100644
--- a/cmd/sower/socks5.go
+++ b/cmd/sower/socks5.go
@@ -4,7 +4,6 @@ import (
 	"encoding/binary"
 	"io"
 	"net"
-	"time"
 
 	"github.com/rs/zerolog/log"
 	"github.com/wweir/sower/router"
@@ -18,7 +17,6 @@ func ServeSocks5(ln net.Listener, r *router.Router) {
 	}
 	go ServeSocks5(ln, r)
 	defer conn.Close()
-	start := time.Now()
 
 	{
 		auth := new(socks5AuthReq)
@@ -68,19 +66,7 @@ func ServeSocks5(ln net.Listener, r *router.Router) {
 	}
 
 	host, port := addr.Addr()
-	route, err := r.RouteHandle(conn, host, port)
-	switch route {
-	case router.RouteProxy:
-	case router.RouteDefault:
-	default:
-		return
-	}
-	log.Err(err).
-		Str("host", host).
-		Uint16("port", port).
-		Str("route", route).
-		Dur("spend", time.Since(start)).
-		Msg("serve socsk5")
+	r.RouteHandle(conn, host, port)
 }
 
 /******************* https://tools.ietf.org/html/rfc1928 *******************/
diff --git a/pkg/deferlog/deferlog.go b/pkg/deferlog/deferlog.go
new file mode 100644
index 0000000..abcaa0d
--- /dev/null
+++ b/pkg/deferlog/deferlog.go
@@ -0,0 +1,131 @@
+// Package deferlog is a copy of zerolog/log/log.go for log in defer
+package deferlog
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/rs/zerolog"
+)
+
+// Logger is the global logger.
+var Logger = zerolog.New(os.Stderr).With().Timestamp().Logger()
+
+// Output duplicates the global logger and sets w as its output.
+func Output(w io.Writer) zerolog.Logger {
+	return Logger.Output(w)
+}
+
+// With creates a child logger with the field added to its context.
+func With() zerolog.Context {
+	return Logger.With()
+}
+
+// Level creates a child logger with the minimum accepted level set to level.
+func Level(level zerolog.Level) zerolog.Logger {
+	return Logger.Level(level)
+}
+
+// Sample returns a logger with the s sampler.
+func Sample(s zerolog.Sampler) zerolog.Logger {
+	return Logger.Sample(s)
+}
+
+// Hook returns a logger with the h Hook.
+func Hook(h zerolog.Hook) zerolog.Logger {
+	return Logger.Hook(h)
+}
+
+// Err starts a new message with error level with err as a field if not nil or
+// with info level if err is nil.
+//
+// You must call Msg on the returned event in order to send the event.
+func Err(err error) *zerolog.Event {
+	return Logger.Err(err)
+}
+
+// Trace starts a new message with trace level.
+//
+// You must call Msg on the returned event in order to send the event.
+func Trace() *zerolog.Event {
+	return Logger.Trace()
+}
+
+// Debug starts a new message with debug level.
+//
+// You must call Msg on the returned event in order to send the event.
+func Debug() *zerolog.Event {
+	return Logger.Debug()
+}
+
+// Info starts a new message with info level.
+//
+// You must call Msg on the returned event in order to send the event.
+func Info() *zerolog.Event {
+	return Logger.Info()
+}
+
+// Warn starts a new message with warn level.
+//
+// You must call Msg on the returned event in order to send the event.
+func Warn() *zerolog.Event {
+	return Logger.Warn()
+}
+
+// Error starts a new message with error level.
+//
+// You must call Msg on the returned event in order to send the event.
+func Error() *zerolog.Event {
+	return Logger.Error()
+}
+
+// Fatal starts a new message with fatal level. The os.Exit(1) function
+// is called by the Msg method.
+//
+// You must call Msg on the returned event in order to send the event.
+func Fatal() *zerolog.Event {
+	return Logger.Fatal()
+}
+
+// Panic starts a new message with panic level. The message is also sent
+// to the panic function.
+//
+// You must call Msg on the returned event in order to send the event.
+func Panic() *zerolog.Event {
+	return Logger.Panic()
+}
+
+// WithLevel starts a new message with level.
+//
+// You must call Msg on the returned event in order to send the event.
+func WithLevel(level zerolog.Level) *zerolog.Event {
+	return Logger.WithLevel(level)
+}
+
+// Log starts a new message with no level. Setting zerolog.GlobalLevel to
+// zerolog.Disabled will still disable events produced by this method.
+//
+// You must call Msg on the returned event in order to send the event.
+func Log() *zerolog.Event {
+	return Logger.Log()
+}
+
+// Print sends a log event using debug level and no extra field.
+// Arguments are handled in the manner of fmt.Print.
+func Print(v ...interface{}) {
+	Logger.Debug().CallerSkipFrame(1).Msg(fmt.Sprint(v...))
+}
+
+// Printf sends a log event using debug level and no extra field.
+// Arguments are handled in the manner of fmt.Printf.
+func Printf(format string, v ...interface{}) {
+	Logger.Debug().CallerSkipFrame(1).Msgf(format, v...)
+}
+
+// Ctx returns the Logger associated with the ctx. If no logger
+// is associated, a disabled logger is returned.
+func Ctx(ctx context.Context) *zerolog.Logger {
+	return zerolog.Ctx(ctx)
+}
diff --git a/pkg/deferlog/enhance.go b/pkg/deferlog/enhance.go
new file mode 100644
index 0000000..49d1602
--- /dev/null
+++ b/pkg/deferlog/enhance.go
@@ -0,0 +1,88 @@
+package deferlog
+
+import (
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+func InfoWarn(err error) *zerolog.Event {
+	if err != nil {
+		return Logger.Warn().Err(err)
+	}
+
+	return Logger.Info()
+}
+func InfoFatal(err error) *zerolog.Event {
+	if err != nil {
+		return Logger.Fatal().Err(err)
+	}
+
+	return Logger.Info()
+}
+
+func DebugWarn(err error) *zerolog.Event {
+	if err != nil {
+		return Logger.Warn().Err(err)
+	}
+
+	return Logger.Debug()
+}
+func DebugError(err error) *zerolog.Event {
+	if err != nil {
+		return Logger.Error().Err(err)
+	}
+
+	return Logger.Debug()
+}
+func DebugFatal(err error) *zerolog.Event {
+	if err != nil {
+		return Logger.Fatal().Err(err)
+	}
+
+	return Logger.Debug()
+}
+
+type StdLogger struct {
+	*zerolog.Logger
+}
+
+var Std = StdLogger{
+	Logger: &log.Logger,
+}
+
+func (std *StdLogger) InfoWarn(err error) *zerolog.Event {
+	if err != nil {
+		return Std.Logger.Warn().Err(err)
+	}
+
+	return Std.Logger.Info()
+}
+func (std *StdLogger) InfoFatal(err error) *zerolog.Event {
+	if err != nil {
+		return Std.Logger.Fatal().Err(err)
+	}
+
+	return Std.Logger.Info()
+}
+
+func (std *StdLogger) DebugWarn(err error) *zerolog.Event {
+	if err != nil {
+		return Std.Logger.Warn().Err(err)
+	}
+
+	return Std.Logger.Debug()
+}
+func (std *StdLogger) DebugError(err error) *zerolog.Event {
+	if err != nil {
+		return Std.Logger.Error().Err(err)
+	}
+
+	return Std.Logger.Debug()
+}
+func (std *StdLogger) DebugFatal(err error) *zerolog.Event {
+	if err != nil {
+		return Std.Logger.Fatal().Err(err)
+	}
+
+	return Std.Logger.Debug()
+}
diff --git a/util/log.go b/pkg/deferlog/init.go
similarity index 57%
rename from util/log.go
rename to pkg/deferlog/init.go
index e11ccbe..2877a0a 100644
--- a/util/log.go
+++ b/pkg/deferlog/init.go
@@ -1,7 +1,8 @@
-package util
+package deferlog
 
 import (
 	"os"
+	"strconv"
 	"strings"
 	"time"
 
@@ -32,9 +33,19 @@ func init() {
 	zerolog.ErrorStackMarshaler = func(err error) interface{} {
 		return pkgerrors.MarshalStack(err)
 	}
-	if fi, _ := os.Stdout.Stat(); (fi.Mode() & os.ModeCharDevice) == 0 {
-		log.Logger = StructLogger
+
+	if ok, _ := strconv.ParseBool(os.Getenv("DEBUG")); ok {
+		SetDefaultLogger(ConsoleLogger, 1, zerolog.DebugLevel)
+
+	} else if fi, _ := os.Stdout.Stat(); (fi.Mode() & os.ModeCharDevice) == 0 {
+		SetDefaultLogger(StructLogger, 1, zerolog.InfoLevel)
+
 	} else {
-		log.Logger = ConsoleLogger
+		SetDefaultLogger(ConsoleLogger, 1, zerolog.InfoLevel)
 	}
 }
+
+func SetDefaultLogger(logger zerolog.Logger, deferSkip int, logLevel zerolog.Level) {
+	log.Logger = logger.Level(logLevel)
+	Logger = logger.With().CallerWithSkipFrameCount(deferSkip + 2).Logger().Level(logLevel)
+}
diff --git a/router/dns.go b/router/dns.go
index 48452d1..3ae47af 100644
--- a/router/dns.go
+++ b/router/dns.go
@@ -5,7 +5,7 @@ import (
 	"time"
 
 	"github.com/miekg/dns"
-	"github.com/rs/zerolog/log"
+	"github.com/wweir/sower/pkg/deferlog"
 )
 
 func (r *Router) ServeDNS(w dns.ResponseWriter, req *dns.Msg) {
@@ -36,12 +36,12 @@ func (r *Router) ServeDNS(w dns.ResponseWriter, req *dns.Msg) {
 
 	conn := <-r.dns.connCh
 	resp, rtt, err := r.dns.ExchangeWithConn(req, conn)
-	if err != nil {
-		log.Error().Err(err).
-			Dur("rtt", rtt).
-			Str("domain", domain).
-			Msg("exchange dns record")
+	deferlog.Std.DebugWarn(err).
+		Dur("rtt", rtt).
+		Str("domain", domain).
+		Msg("exchange dns record")
 
+	if err != nil {
 		conn.Close()
 		w.WriteMsg(r.dnsFail(req, dns.RcodeServerFailure))
 		return
diff --git a/router/router.go b/router/router.go
index 5e7e265..f089f5a 100644
--- a/router/router.go
+++ b/router/router.go
@@ -9,20 +9,12 @@ import (
 	geoip2 "github.com/oschwald/geoip2-golang"
 	"github.com/pkg/errors"
 	"github.com/rs/zerolog/log"
+	"github.com/wweir/sower/pkg/deferlog"
 	"github.com/wweir/sower/pkg/dhcp"
 	"github.com/wweir/sower/pkg/mem"
 	"github.com/wweir/sower/util"
 )
 
-const (
-	RouteBlock   = "block"
-	RouteDirect  = "direct"
-	RouteProxy   = "proxy"
-	RouteLocal   = "local"
-	RouteAccess  = "access"
-	RouteDefault = "default"
-)
-
 type ProxyDialFn func(network, host string, port uint16) (net.Conn, error)
 type Router struct {
 	blockRule  *util.Node
@@ -101,25 +93,34 @@ func (r *Router) dialDNSConn() {
 	}
 }
 
-func (r *Router) RouteHandle(conn net.Conn, domain string, port uint16) (string, error) {
+func (r *Router) RouteHandle(conn net.Conn, domain string, port uint16) (err error) {
+	start := time.Now()
+	defer func() {
+		deferlog.DebugWarn(err).
+			Str("domain", domain).
+			Uint16("port", port).
+			Dur("spend", time.Since(start)).
+			Msg("RouteHandle")
+	}()
+
 	addr := net.JoinHostPort(domain, strconv.FormatUint(uint64(port), 10))
 
 	switch {
 	case r.blockRule.Match(domain):
-		return RouteBlock, nil
+		return nil
 
 	case r.directRule.Match(domain):
-		return RouteDirect, r.DirectHandle(conn, addr)
+		return r.DirectHandle(conn, addr)
 
 	case r.proxyRule.Match(domain):
-		return RouteProxy, r.ProxyHandle(conn, domain, port)
+		return r.ProxyHandle(conn, domain, port)
 
 	case r.localSite(domain):
-		return RouteLocal, r.DirectHandle(conn, addr)
+		return r.DirectHandle(conn, addr)
 	case r.isAccess(domain, port):
-		return RouteAccess, r.DirectHandle(conn, addr)
+		return r.DirectHandle(conn, addr)
 	default:
-		return RouteDefault, r.ProxyHandle(conn, domain, port)
+		return r.ProxyHandle(conn, domain, port)
 	}
 }
 
diff --git a/util/relay.go b/util/relay.go
index 90fd5f5..4df33e8 100644
--- a/util/relay.go
+++ b/util/relay.go
@@ -10,7 +10,7 @@ import (
 	"github.com/pkg/errors"
 )
 
-func RelayTo(conn net.Conn, addr string) (time.Duration, error) {
+func RelayTo(conn net.Conn, addr string) (dur time.Duration, err error) {
 	if _, _, err := net.SplitHostPort(addr); err != nil {
 		addr = net.JoinHostPort(addr, "80")
 	}