This entry starts the rsusersd daemon when required. This service provides a list of current users active on a system. The rusersd service runs as root and provides a list of current users active on a system. An attacker may use this service to learn valid account names on the system. This is not an essential service and should be disabled.
Solution
In /etc/inetd.conf, comment out the rusersd entry- chsubserver -r inetd -C /etc/inetd.conf -d -v 'rusersd' -p 'udp'