Had the same issue after upgrading from 14.04 to 16.04. Even with the planning to upgrade all our Ubuntu Servers to the lastest LTS ( 18.04) Needed to monitor disk usage from Nagios Server, since its critical file storage service.
My Nagios server is running on a FreeBSD 12 Stable Server with NRPE latest version ( check_nrpe3 ) Looks like nrpe package version from 16.04 offical repositories is a lot older ( 2.x.x ) than the current Nagios supported version ( 3.x) I fixed my issue by compiling NRPE manually. The process is very well documented by Nagios Support Team: https://support.nagios.com/kb/article/nrpe-how-to-install-nrpe-8.html -> Don`t forget to check and validate your backups, in case something goes wrong.) 1 - sudo apt remove nagios-nrpe-server 2 - sudo apt autoremove 3 - sudo cd /tmp 4 - sudo wget http://assets.nagios.com/downloads/nagiosxi/agents/linux-nrpe-agent.tar.gz 5 - sudo tar xzf linux-nrpe-agent.tar.gz 6 - cd linux-nrpe-agent 7 - sudo ./fullinstall The ./fullinstall script will warn you that it should be run on a clean system. After it finishes compiling and seting up nrpe and xinetd, it will also ask you to authorize your Nagios Server IP to Query Local NRPE. After that, you can go to /usr/local/etc/nagios/nrpe.cfg, adjust your checks and restart xinetd (service xinetd restart) Wait or force your Nagios Server to re-check monitored stuff and it should work as expected. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782650 Title: nrpe plugin in bionic fails with "Error - Could not complete SSL handshake" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nagios-nrpe/+bug/1782650/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
