This entry starts the discard service when required. This service is used as a debugging tool by setting up a listening socket which ignores the data it receives. The discard service is used as a debugging and measurement tool. It sets up a listening socket and ignores data that it receives. This is a /dev/null service and is obsolete. This can be used in DoS attacks and therefore, must be disabled.
In /etc/inetd.conf, comment out the discard entries- chsubserver -r inetd -C /etc/inetd.conf -d -v 'discard' -p 'tcp'