Hiee All, I have very simple question. I have already implemented custom reactor for handling ICMP requests (reference: txnettools) . My problem is: i am implementing tcp traceroute. I have handled all icmp time exceed messages. But, i want to handle tcp syn-ack reply which i am getting from remote server. How can i do that ? Can i start listening to TCP syn req or replies on the same reactor on which i am listening to icmp replies ? or should i install new custom reactor for listening to tcp replies ? I want to parse SYN ACK request ONLY. Neither I want to make a new connection with remote server nor handling them! I just need syn ack replies to be parsed so that i can figure out whether i have reached my destination or not. thank you. Jay Shah (Technische Universität München, München, Deutschland Tel. +49 176 7266 7259 )