/etc/xinetd.d/nrpe "only_from"-param for check_nrpe based on hostname

[jonas kellens]

Hello there !

I'm new to the list and rather new to Nagios also... I have the
following question :

I have the NRPE-plugin for Nagios running as part of the Xinetd-service
on a remote server, this is its config :

bash-3.2# cat /etc/xinetd.d/nrpe 
# default: on
# description: NRPE (Nagios Remote Plugin Executor)
service nrpe
{
flags = REUSE
socket_type = stream 
port = 5666 
wait = no
user = nagios
group = nagios
server = /usr/local/nagios/bin/nrpe
server_args = -c /usr/local/nagios/etc/nrpe.cfg --inetd
log_on_failure += USERID
disable = no
only_from = 127.0.0.1 host.no-ip.biz
}

host.no-ip.biz = domain name of my Nagios Monitoring server, who has a
dynamic IP-address

When I put the dynamic DNS-name there, the plugin will not work. I get
the following error on the Nagios Monitoring server :

[root at nagios nagios]# /usr/local/nagios/libexec/check_nrpe -H
<ip_of_remote_server>
CHECK_NRPE: Error - Could not complete SSL handshake.

When I put the current IP-address of the Nagios Monitoring server
in /etc/xinetd.d/nrpe on the remote server, I get the following output
on the Nagios Monitoring server :

[root at nagios nagios]# /usr/local/nagios/libexec/check_nrpe -H
<ip_of_remote_server>
NRPE v2.12

Question : How can I enable the lookup of a dynamic IP-address via the
DynDNS-domainname ?? How can I put my "host.no-ip.biz" into the
NRPE-service ??

Tomorrow the IP-address may have changed and I need to manually
edit /etc/xinetd.d/nrpe on the remote server again.

Thanks for the help !

Jonas.
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