diff --git a/transport/internet/sockopt_darwin.go b/transport/internet/sockopt_darwin.go
index 79e2133a..86af492a 100644
--- a/transport/internet/sockopt_darwin.go
+++ b/transport/internet/sockopt_darwin.go
@@ -1,7 +1,7 @@
 package internet
 
 import (
-	network "net"
+	gonet "net"
 	"os"
 	"syscall"
 	"unsafe"
@@ -108,13 +108,58 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 				return err
 			}
 		}
-		if config.Interface != "" {
-			InterfaceIndex := getInterfaceIndexByName(config.Interface)
-			if InterfaceIndex != 0 {
-				if err := unix.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_BOUND_IF, InterfaceIndex); err != nil {
-					return errors.New("failed to set Interface").Base(err)
+
+		if config.TcpKeepAliveIdle > 0 || config.TcpKeepAliveInterval > 0 {
+			if config.TcpKeepAliveIdle > 0 {
+				if err := unix.SetsockoptInt(int(fd), unix.IPPROTO_TCP, unix.TCP_KEEPALIVE, int(config.TcpKeepAliveInterval)); err != nil {
+					return errors.New("failed to set TCP_KEEPINTVL", err)
 				}
 			}
+			if config.TcpKeepAliveInterval > 0 {
+				if err := unix.SetsockoptInt(int(fd), unix.IPPROTO_TCP, sysTCP_KEEPINTVL, int(config.TcpKeepAliveIdle)); err != nil {
+					return errors.New("failed to set TCP_KEEPIDLE", err)
+				}
+			}
+			if err := unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_KEEPALIVE, 1); err != nil {
+				return errors.New("failed to set SO_KEEPALIVE", err)
+			}
+		} else if config.TcpKeepAliveInterval < 0 || config.TcpKeepAliveIdle < 0 {
+			if err := unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_KEEPALIVE, 0); err != nil {
+				return errors.New("failed to unset SO_KEEPALIVE", err)
+			}
+		}
+	}
+
+	if config.Interface != "" {
+		iface, err := gonet.InterfaceByName(config.Interface)
+
+		if err != nil {
+			return errors.New("failed to get interface ", config.Interface).Base(err)
+		}
+		if network == "tcp6" || network == "udp6" {
+			if err := unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_BOUND_IF, iface.Index); err != nil {
+				return errors.New("failed to set IPV6_BOUND_IF").Base(err)
+			}
+		} else {
+			if err := unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_BOUND_IF, iface.Index); err != nil {
+				return errors.New("failed to set IP_BOUND_IF").Base(err)
+			}
+		}
+	}
+
+	return nil
+}
+
+func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig) error {
+	if isTCPSocket(network) {
+		tfo := config.ParseTFOValue()
+		if tfo > 0 {
+			tfo = TCP_FASTOPEN_SERVER
+		}
+		if tfo >= 0 {
+			if err := unix.SetsockoptInt(int(fd), unix.IPPROTO_TCP, unix.TCP_FASTOPEN, tfo); err != nil {
+				return err
+			}
 		}
 
 		if config.TcpKeepAliveIdle > 0 || config.TcpKeepAliveInterval > 0 {
@@ -138,46 +183,19 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 		}
 	}
 
-	return nil
-}
+	if config.Interface != "" {
+		iface, err := gonet.InterfaceByName(config.Interface)
 
-func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig) error {
-	if isTCPSocket(network) {
-		tfo := config.ParseTFOValue()
-		if tfo > 0 {
-			tfo = TCP_FASTOPEN_SERVER
+		if err != nil {
+			return errors.New("failed to get interface ", config.Interface).Base(err)
 		}
-		if tfo >= 0 {
-			if err := unix.SetsockoptInt(int(fd), unix.IPPROTO_TCP, unix.TCP_FASTOPEN, tfo); err != nil {
-				return err
+		if network == "tcp6" || network == "udp6" {
+			if err := unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_BOUND_IF, iface.Index); err != nil {
+				return errors.New("failed to set IPV6_BOUND_IF").Base(err)
 			}
-		}
-		if config.Interface != "" {
-			InterfaceIndex := getInterfaceIndexByName(config.Interface)
-			if InterfaceIndex != 0 {
-				if err := unix.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_BOUND_IF, InterfaceIndex); err != nil {
-					return errors.New("failed to set Interface").Base(err)
-				}
-			}
-		}
-
-		if config.TcpKeepAliveIdle > 0 || config.TcpKeepAliveInterval > 0 {
-			if config.TcpKeepAliveIdle > 0 {
-				if err := unix.SetsockoptInt(int(fd), unix.IPPROTO_TCP, unix.TCP_KEEPALIVE, int(config.TcpKeepAliveInterval)); err != nil {
-					return errors.New("failed to set TCP_KEEPINTVL", err)
-				}
-			}
-			if config.TcpKeepAliveInterval > 0 {
-				if err := unix.SetsockoptInt(int(fd), unix.IPPROTO_TCP, sysTCP_KEEPINTVL, int(config.TcpKeepAliveIdle)); err != nil {
-					return errors.New("failed to set TCP_KEEPIDLE", err)
-				}
-			}
-			if err := unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_KEEPALIVE, 1); err != nil {
-				return errors.New("failed to set SO_KEEPALIVE", err)
-			}
-		} else if config.TcpKeepAliveInterval < 0 || config.TcpKeepAliveIdle < 0 {
-			if err := unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_KEEPALIVE, 0); err != nil {
-				return errors.New("failed to unset SO_KEEPALIVE", err)
+		} else {
+			if err := unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_BOUND_IF, iface.Index); err != nil {
+				return errors.New("failed to set IP_BOUND_IF").Base(err)
 			}
 		}
 	}
@@ -224,24 +242,3 @@ func setReusePort(fd uintptr) error {
 	}
 	return nil
 }
-func getInterfaceIndexByName(name string) int {
-	ifaces, err := network.Interfaces()
-	if err == nil {
-		for _, iface := range ifaces {
-			if (iface.Flags&network.FlagUp == network.FlagUp) && (iface.Flags&network.FlagLoopback != network.FlagLoopback) {
-				addrs, _ := iface.Addrs()
-				for _, addr := range addrs {
-					if ipnet, ok := addr.(*network.IPNet); ok && !ipnet.IP.IsLoopback() {
-						if ipnet.IP.To4() != nil {
-							if iface.Name == name {
-								return iface.Index
-							}
-						}
-					}
-				}
-			}
-
-		}
-	}
-	return 0
-}