XCOM requires XINETD or INETD services to be installed on your Linux and/or UNIX in order for the XCOM ports to be listening.
CA XCOM Data Transport requires that the XINETD or INETD service be installed on your Linux or UNIX OS in order for the XCOM ports to be listening for incoming transfers. To verify if XINETD or INETD is installed or running on your system you can issue some of these commands:
ps -ef | grep xinetd
ps -ef | grep inetd
chkconfig --list | grep xinetd