Any concerns using check_nrpe 2.15 with remote nrpe 3.2.1

[awilson]

Hi. We are running Nagios XI 5.4.4. Our Nagios XI hosts are using check_nrpe version 2.15 while some remote hosts have nrpe 2.15 and others have 3.2.1. I saw reading posts about early versions of nrpe v3 having potential issues. Are there known concerns with using check_nrpe 2.15 with remote nrpe 3.2.1?

Thanks!

[syang]

Hi Awilson,

There should be no concerns with NRPE 2.15 and 3.2.1. Per the article https://support.nagios.com/kb/article/n ... d-518.html, there is backwards compatibility between NRPE v3 and NRPE v2.

The v2 of check_nrpe will contact the client trying to establish a v2 packet session (just like it always has). The connection will succeed allowing NRPE to operate as per normal. This backwards compatibility allows you to update all of your clients before updating the plugin on your Nagios server.

Until you update the check_nrpe plugin you will not be able to take advantage of the larger v3 packet size. Monitoring will function as normal.

[npolovenko]

Hello, @awilson. If the check_nrpe plugin is of version 2.15 and the remote nrpe agent is of version 3.2.1, they'll work just fine. But if the check_nrpe plugin is of version 3.2.1 and the remote agent is of version 2.15 you may encounter SSL library issues. Let me know if you have any other questions.

[awilson]

Thank you.

You can close this.