diff --git a/common/netutil/netutil.go b/common/netutil/netutil.go
index c3c788b..de1842c 100644
--- a/common/netutil/netutil.go
+++ b/common/netutil/netutil.go
@@ -160,12 +160,7 @@ func ExecCmd(c string, args ...string) string {
 }
 
 func GetLinuxDefaultGateway() string {
-	gateway := ExecCmd("sh", "-c", "netstat -r | grep 'default' | awk '{print $2}'")
-	if net.ParseIP(gateway) != nil {
-		return gateway
-	}
-	nslookup := "nslookup " + gateway + " | awk '/^Address: / { print $2 ; exit }'"
-	return ExecCmd("sh", "-c", nslookup)
+	return ExecCmd("sh", "-c", "route -n | grep 'UG[ \t]' | awk '{print $2}'")
 }
 
 func GetMacDefaultGateway() string {
diff --git a/tun/tun.go b/tun/tun.go
index adcf9dc..ec51050 100644
--- a/tun/tun.go
+++ b/tun/tun.go
@@ -41,7 +41,6 @@ func configTun(config config.Config, iface *water.Interface) {
 				netutil.ExecCmd("/sbin/ip", "route", "add", "128.0.0.0/1", "dev", iface.Name())
 				netutil.ExecCmd("/sbin/ip", "route", "add", "8.8.8.8/32", "via", config.DefaultGateway, "dev", physicalIface)
 				netutil.ExecCmd("/sbin/ip", "route", "add", strings.Join([]string{serverIP, "32"}, "/"), "via", config.DefaultGateway, "dev", physicalIface)
-				//netutil.ExecCmd("/sbin/ip", "route", "add", strings.Join([]string{config.DefaultDNS, "32"}, "/"), "via", config.DefaultGateway, "dev", physicalIface)
 			}
 		}
 
@@ -53,7 +52,6 @@ func configTun(config config.Config, iface *water.Interface) {
 			serverIP := netutil.LookupIP(strings.Split(config.ServerAddr, ":")[0])
 			if physicalIface != "" && serverIP != "" {
 				netutil.ExecCmd("route", "add", serverIP, config.DefaultGateway)
-				//netutil.ExecCmd("route", "add", config.DefaultDNS, config.DefaultGateway)
 				netutil.ExecCmd("route", "add", "8.8.8.8", config.DefaultGateway)
 				netutil.ExecCmd("route", "add", "0.0.0.0/1", "-interface", iface.Name())
 				netutil.ExecCmd("route", "add", "128.0.0.0/1", "-interface", iface.Name())