Following are the UNIX software requirements.
In Web mode, specify a server URL when starting a session. Web mode uses either HTTP or HTTPS protocol. It does not require the use of the rexec protocol.
In Traditional mode, specify the server as a machine name rather than a URL. Traditional mode uses the rexec protocol or a more secure alternative (ESD). The default method is rexec.
For Windows clients to be able to connect to a UNIX server in Traditional mode using the default method, the rexec daemon must not be disabled in /etc/inetd.conf on the UNIX server. The location of the inetd.conf file might vary, depending on the platform on which you are running. Ensure that the rexec daemon is enabled and has not been commented out. If you use Web mode or the alternative secure engine connection (using ESD), it does not matter if the rexec daemon is enabled or not.