diff --git a/netcard.go b/netcard.go
index 82a8b18..6876ebe 100644
--- a/netcard.go
+++ b/netcard.go
@@ -111,7 +111,8 @@ func NewNetTunnel() *NetTunnel {
 			case ethernet.IPv4:
 				payload := frame.Payload()
 				log.Printf("bytes len: %d type(ipv4): % x", len(rbuf), frame.Ethertype())
-				log.Println(frame.Source(), net.IPv4(payload[12], payload[13], payload[14], payload[15]), frame.Destination())
+
+				log.Println(frame.Source(), net.IP(payload[12:16]).To4(), binary.BigEndian.Uint16(frame[20:22]), frame.Destination(), net.IP(payload[16:20]).To4(), binary.BigEndian.Uint16(frame[22:24]))
 
 				log.Printf("src: %s(%d) dst: %s(%d)", waterutil.IPv4Source(frame), waterutil.IPv4SourcePort(frame), waterutil.IPv4Destination(frame), waterutil.IPv4DestinationPort(frame))
 				log.Println(len(frame))