CHECK_NRPE: Error - Could not complete SSL handshake.

[iLinux85]

Hello

when i was trying to excute the following command to check NRPE if working or not

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/usr/local/nagios/libexec/check_nrpe -H localhost

i got the following error

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CHECK_NRPE: Error - Could not complete SSL handshake.

but when i trying to use the command by ip instead of localhost

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/usr/local/nagios/libexec/check_nrpe -H 10.0.0.1

it's working good

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NRPE v2.13

note : this ip is the localhost ip address

so it have to work on localhost instead of ip ? need advice

thanks

[mguthrie]

Check your firewall settings, and then check the "allowed hosts" directive either in your nrpe.cfg or in your /etc/xinetd.d/nrpe file.

[iLinux85]

Hello

i fix it by add 127.0.0.1 and ip address of the machine too in only_from located /etc/xinetd.d/nrpe

but i have another problem in the remote machine i want to monitor it , i execute the following command

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    root@host [~]# /usr/local/nagios/libexec/check_nrpe -H localhost
    NRPE v2.13

it's worked ok

but when i try to execute the following command

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    root@sawa4 [~]# /usr/local/nagios/libexec/check_nrpe -H localhost -c check_users
    NRPE: Unable to read output

on the machine have the nagios core

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    [root@site ~]# /usr/local/nagios/libexec/check_nrpe -H <<remote_ip_address>>
    NRPE v2.13
    [root@site ~]# /usr/local/nagios/libexec/check_nrpe -H <<remote_ip_address>> -c check_load
    NRPE: Unable to read output
    [root@site ~]#

Note : both machines running on centos 5.7 linux

i don't know what is missing , and i looking for advice
thanks

[lmiltchev]

This is interesting... If you are able to run:

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# /usr/local/nagios/libexec/check_nrpe -H localhost

successfully, then you should be able to run:

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# /usr/local/nagios/libexec/check_nrpe -H localhost -c check_users

as well...

What happens, when you try to run check_users directly on your target machine, for example:

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# cd /usr/local/nagios/libexec
# ./check_users -w 5 -c 10

[iLinux85]

i am sorry i forgot to install nagios plugin on the remote host i installed nagios NRPE only . everything working good now