Hello All. Topology : (tcp) S --------- R -------- K (tcp sink) If i want addtional 'method' in [Node R], what is solution? Very importantly, 'method' has bidirectional property. (i.e 'R' save packets from 'S', and delete saved packets when receve 'ack' from 'K') It's so difficult to solve. Thanks in advance for any clue.