diff --git a/connection.go b/connection.go
index 21d3977..6111d46 100644
--- a/connection.go
+++ b/connection.go
@@ -22,6 +22,7 @@ func (c *Connection) Read(p []byte) (int, error) {
 	if !ok {
 		return 0, c.Close()
 	}
+	c.logger.Trace("dataframe received: ", df)
 	return df.Read(p)
 }
 
@@ -42,11 +43,13 @@ func (c *Connection) Write(p []byte) (int, error) {
 	if err != nil {
 		return 0, err
 	}
+	c.logger.Trace("dataframe send: ", df)
 	c.TX <- df
 	return n, nil
 }
 
 func (c *Connection) Close() error {
+	defer c.logger.Tracef("connection closed")
 	var lock sync.Mutex
 	defer close(c.TX)
 	if !c.closed {
diff --git a/manager.go b/manager.go
index 6ed4325..9c149a7 100644
--- a/manager.go
+++ b/manager.go
@@ -34,18 +34,22 @@ func (m *Manager) SetLogger(logger Logger) {
 }
 
 func (m *Manager) Run() {
+	m.logger.Debug("manager run")
 	onReceiveQueue := make(chan bool)
 	for {
 		select {
 		case <-m.closed:
 			return
 		case df := <-m.incoming:
+			m.logger.Trace("dataframe->tunnel: ", df)
 			go df.Encode(m.Tunnel)
 		case connection := <-m.newConnection:
 			m.Connections[connection.ID] = connection
+			m.logger.Tracef("connection '%s' registered", connection.ID)
 		case connection := <-m.delConnection:
 			connection.Close()
 			delete(m.Connections, connection.ID)
+			m.logger.Tracef("connection '%s' unregistered", connection.ID)
 		case onReceiveQueue <- true:
 			go m.onReceive(onReceiveQueue)
 		}
@@ -58,6 +62,8 @@ func (m *Manager) onReceive(ch chan bool) {
 	if err := df.Decode(m.Tunnel); err != nil {
 		return
 	}
+	m.logger.Trace("dataframe<-tunnel: ", df)
+
 	switch df.Type {
 	case TypeRequest:
 		m.accept <- df