Securing Network Services
The /etc/inetd.conf file is where you begin configuring most of the network services for your computer. You can stop these services by placing a pound sign (#) in front of the services that are not required for operation. One method you can use to do this is to comment out everything in the inetd.conf file (after making a backup, of course) and add them back as you need them. You should comment out the following services:
ftp— Allows a user to transfer files to or from a host.
tftp— Allows remote users to transfer files from a host without requiring a login.
systat— Invokes /bin/ps -auxww, which shows you processes running as well as the user it runs as.
rexd— Allows remote users to run RPC programs on a host.
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