diff --git a/cmd/cmd.go b/cmd/cmd.go
index 39794c9..568cc35 100644
--- a/cmd/cmd.go
+++ b/cmd/cmd.go
@@ -89,11 +89,11 @@ func Excute() {
 		fmt.Print(parser.Usage(err))
 		return
 	}
-	
+
 	if strings.Contains(domain, "/") {
 		domain = strings.Split(domain, "/")[2]
 	}
-	
+
 	if strings.Contains(domain, "]") {
 		domain = strings.Split(strings.Split(domain, "]")[0], "[")[1]
 	} else if strings.Contains(domain, ":") {
@@ -111,7 +111,7 @@ func Excute() {
 		fmt.Println("NextTrace 基于 Windows 的路由跟踪还在早期开发阶段，目前还存在诸多问题，TCP/UDP SYN 包请求可能不能正常运行")
 	}
 
-	if *tcp || *udp {
+	if *udp {
 		ip = util.DomainLookUp(domain, true)
 	} else {
 		ip = util.DomainLookUp(domain, false)
diff --git a/fast_trace/fast_trace ipv6.go b/fast_trace/fast_trace ipv6.go
index 55bda97..a83fd4f 100644
--- a/fast_trace/fast_trace ipv6.go	
+++ b/fast_trace/fast_trace ipv6.go	
@@ -115,7 +115,12 @@ func FastTestv6(tm bool, outEnable bool) {
 		w.Conn.Close()
 	}()
 
-	ft.TracerouteMethod = trace.ICMPTrace
+	if !tm {
+		ft.TracerouteMethod = trace.ICMPTrace
+		fmt.Println("您将默认使用ICMP协议进行路由跟踪，如果您想使用TCP SYN进行路由跟踪，可以加入 -T 参数")
+	} else {
+		ft.TracerouteMethod = trace.TCPTrace
+	}
 
 	switch c {
 	case "1":
diff --git a/util/util.go b/util/util.go
index d323517..c4467da 100644
--- a/util/util.go
+++ b/util/util.go
@@ -51,34 +51,20 @@ func DomainLookUp(host string, ipv4Only bool) net.IP {
 		os.Exit(1)
 	}
 
-	var ipSlice = []net.IP{}
 	var ipv6Flag = false
 
-	for _, ip := range ips {
-		ipSlice = append(ipSlice, ip)
-		// if ipv4Only {
-		// 	// 仅返回ipv4的ip
-		// 	if ip.To4() != nil {
-		// 		ipSlice = append(ipSlice, ip)
-		// 	} else {
-		// 		ipv6Flag = true
-		// 	}
-		// } else {
-		// 	ipSlice = append(ipSlice, ip)
-		// }
-	}
 	if ipv6Flag {
-		fmt.Println("[Info] IPv6 TCP/UDP Traceroute is not supported right now.")
-		// if len(ipSlice) == 0 {
-		// 	os.Exit(0)
-		// }
+		fmt.Println("[Info] IPv6 UDP Traceroute is not supported right now.")
+		if len(ips) == 0 {
+			os.Exit(0)
+		}
 	}
 
-	if len(ipSlice) == 1 {
-		return ipSlice[0]
+	if len(ips) == 1 {
+		return ips[0]
 	} else {
 		fmt.Println("Please Choose the IP You Want To TraceRoute")
-		for i, ip := range ipSlice {
+		for i, ip := range ips {
 			fmt.Fprintf(color.Output, "%s %s\n",
 				color.New(color.FgHiYellow, color.Bold).Sprintf("%d.", i),
 				color.New(color.FgWhite, color.Bold).Sprintf("%s", ip),
@@ -87,11 +73,11 @@ func DomainLookUp(host string, ipv4Only bool) net.IP {
 		var index int
 		fmt.Printf("Your Option: ")
 		fmt.Scanln(&index)
-		if index >= len(ipSlice) || index < 0 {
+		if index >= len(ips) || index < 0 {
 			fmt.Println("Your Option is invalid")
 			os.Exit(3)
 		}
-		return ipSlice[index]
+		return ips[index]
 	}
 }