Nagios Support Forum

Hi,

I have installed the Nagios XI linux agent on one o my linux servers successfully.

However, in Nagios its gaves me this error:

"CHECK_NRPE: Error - Could not complete SSL handshake."

Any ideas what this means?

Also the agent did not ask me for a password during the install. is this normal?

Thanks,
James

You might not have pass the SSL argument before installation. Uninstall the agent then do a "make config" select SSL and then install it again.

If the target linux system is a RHEL or CentOS system you can use our installer script which does a lot of the initial configuration for you.
http://library.nagios.com/library/produ ... inux-agent

Sorry I am not a linux expert.

How do I uninstall the agent?

Also I did use the installer script to install the agent. But its didnt ask me anything about SSL? Should it of done?

You "shouldn't" need to do anything with SSL if you installed the agent according to our documentation. Can you outline what you did to initially install the nrpe agent before using our install doc? I'm wondering if the first attempt is creating a conflict somewhere.

To install the agent I followed this install guide:

http://assets.nagios.com/downloads/nagi ... _Agent.pdf

Thats all did.

Was there something else I had to do?

Thanks,
James

Did you add your XI server to the allowed_hosts (daemon) / only_from (xinetd) directive on the target?

I suggest that you try this installation step, because this is one that i did on installing the linux agent and it successfully monitored.

tar xzf linux-nrpe-agent-el4.tar.gz
cd linux-nrpe-agent-el4
./fullinstall
- and you will encounter a problem
"checking where the gettext function comes from... libc
configure: See http://nagiosplugins.org/faq/compile/co ... rs_to_hang if this next part takes a long time
checking for redhat spopen problem..

And then:
*cd subcomponents
*cd nagiosplugins
*vi install
on the line of
time ./ configure
--enable-redhat-pthread-workaround ------------------------> add this after the word configure
and run the ./fullinstall again, and it is successfully installed.
*and now Im sure that you can now monitor your linux server without any errors.

Thanks for the tip! Let us know if you still need assistance on this.

I downloaded the recent Linux Agent, and have been installing successfully on several CentOS servers. My compliments....the packaged agent install just keeps getting easier and easier.

But on one Centos 5.4 64bit system, I hit this same SSL handshake problem. I followed the mod shown above, reinstalled, and it worked fine.

Kind of odd, so I thought I should report it.

...Lyle