this is obsolete doc -- see http://doc.nethence.com/ instead

Inetd port checker on RHEL 

Create the inetd capable script, 

vi /root/scinetd.ksh

like, 

#!/bin/ksh

        while read input; do

                echo "$HOSTNAME: $input"

                logger "$HOSTNAME: $input"

        done

Configure the scinetd service, 

vi /etc/xinetd.d/scinetd

like, 

service scinetd 

{

        disable = no

        socket_type     = stream

        wait            = no

        user            = root

        server          = /root/scinetd.ksh

        log_on_failure  += USERID

}

Define the port for the scinetd service, 

vi /etc/services

like, 

scinetd         990/tcp

Note. "990/udp" works too.