What is "Tcpillust"?
Tcpillust is an X11 based graphical analysis tool for tcp connection.
It takes tcpdump file(s) specified at the command line and draws
pictures like figures in the ``TCP/IP Illustrated'' series.
Tcpdump files fed to by tcpillust should contain only data for a single
TCP connection. If other data are contained in the tcpdump files, tcpillust
can't generate results or the results will be inaccurate.
When tcpillust takes a single tcpdump file, it guesses transmit time and
receive time on the remote host. When tcpillust takes two tcpdump files, it
regards them as tcp-client side file and tcp-server side file, and
generates the results from them. If you want precise analysis, you should use
two tcpdump files.