Inetd
inetd is a process on UNIX systems that sits in the background and listens
to various network ports.
When a machine tries to make a connection to a certain port (for example, the
incoming telnet port), inetd forks off a copy of the appropriate daemon for that
port (in the case of the telnet port, inetd starts in.telnetd).
This is simpler than running many separate, standalone daemons
(e.g., individual copies of telnetd, ftpd, and so forth)
---inetd starts up the daemons only when they are needed.
3.4: How To Cause inetd to Log All Requests?
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This is done by adding the -t switch to inetd. This should be done in
the /etc/rc (SunOS) or /etc/rc2.d/S72inetsvc (Solaris). This will log
all service requests to syslog, provided syslog.conf has been setup to
capture daemon.notice type messages (by default daemon.notice message
are logged to /var/adm/messages).