By default, connections are unrestricted but are logged. For example, we can restart inetd so that the changes from the previous panel take effect. Then some quick investigation should show the logged connections:

# telnet localhost
login: (press <ctrl-d> to abort)

# tail -1 /var/log/secure
Feb 12 23:33:05 firewall in.telnetd[440]: connect from 127.0.0.1

The telnet attempt was logged by tcpd, so it looks like we have things working. Since tcpd provides a consistent connection logging service, that frees up the individual service daemons from each needing to log connections on their own. In fact, it's similar to inetd doing the work of accepting connections, since that frees up each of the individual daemons from needing to accept their own connections. Isn't the simplicity of Linux (UNIX) marvelous?