my host ip is 192.168.21.3
when I ssh 192.168.21.3,there are some error message below
ssh_exchange_identification: Connection closed by remote host
I have started xinetd./etc/rc.d/xinetd start
I have started sshd. /etc/rc.d/sshd start
That's ok
The context of /etc/xinetd.conf below:
#
# /etc/xinetd.conf
#

service sshd
{
type =INTERNAL
socket_type =stream
protoco =tcp
port =22
only_from =192.168.21.3
wait =no
}

defaults
{
instances = 60
log_type = SYSLOG authpriv
log_on_success = HOST PID
log_on_failure = HOST
cps = 25 30
}

includedir /etc/xinetd.d

So that's all above
But I don't know the reason of the ssh question

This may sound silly, but have you checked TCP Wrappers /etc/hosts.allow and /etc/hosts.deny ? You could be denying sshd through the wrappers ?

The sshd can be run without xinetd, I guess it is the sshd_config problem or the firewall problem.

1. Execute "netstat -na" to chekc whether the 22 port is open and listening.
2. Execute "iptables -L" to check the firewall settings.

I'm not sure whether the xinetd setting impacts this, try adding "disable=yes" into the xinetd sshd section if necessary.

yes,I have fix up my question
The reason of this problem is I have never change the file /etc/host.deny

thanks james.farrow