Turn logging on by editing the /etc/default/inetd file by adding the following line:
If the previous line already exists with a comment symbol, then you can just delete the comment symbol.
Kill the inetd daemon.
Restart the inetd daemon.
See System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP) and System Administration Guide: Naming and Directory Services (FNS and NIS+) for further information on name services.