Nagios Support

NRPE SSL errors usually come down to a version mismatch between the NRPE agent and the check_nrpe plugin. The most common fixes: (1) disable SSL on both sides with -n flag if encryption isn’t required, (2) ensure NRPE and check_nrpe were compiled with the same OpenSSL version, (3) for “receive header underflow” errors, the plugin returned no output — check the command definition and that the plugin path exists on the remote host, (4) for socket timeouts, increase the timeout with -t 30 or check firewall rules on port 5666. Note: Nagios has deprecated NRPE in favour of NCPA for new deployments.

The default Nagios XI username is nagiosadmin and the password is set during the installation wizard — there is no universal factory default. If you’ve lost access, reset it via SSH: run /usr/local/nagiosxi/scripts/reset_password.sh as root. For NSClient++ on Windows, the default password is nagios — change this immediately after installation. For fresh Nagios Core installs, the nagiosadmin password is set manually with htpasswd during setup.

The best practice to migrate away from an EOL OS and older XI version is to create a new installation of Nagios XI, using the same version of XI on the existing server, and a new, modern OS distribution, then preform a back up and restore from the existing server to the new server. Full documentation available in the Best practices to upgrade and migrate Nagios XI document below

The best practice to migrate away from an EOL OS and older Nagios Log Server version is to create a new installation of Nagios Log Server, using the same version of Nagios Log Server on the existing server, and a new, modern OS distribution, then preform a back up and restore from the existing server to the new server. Full documentation available in the Best practices to upgrade and migrate Nagios Nagios Log Server document below

The best practice to migrate away from an EOL OS and older Nagios Network Analyzer version is to create a new installation of Nagios Network Analyzer , using the same version of Nagios Network Analyzer on the existing server, and a new, modern OS distribution, then preform a back up and restore from the existing server to the new server. Full documentation available in the Best practices to upgrade and migrate Nagios Network Analyzer document below

The best practice to migrate away from an EOL OS and older Nagios Fusion version is to create a new installation of Nagios Fusion , using the same version of Nagios Fusion on the existing server, and a new, modern OS distribution, then preform a back up and restore from the existing server to the new server. Full documentation available in the Best practices to upgrade and migrate Nagios Fusion document below

XI is our fully supported monitoring solution built on the foundation of Core with additional features and functionality to streamline your IT management. XI is equipped with time-saving features, including easy-to-use Configuration Wizards, advanced multi-tenancy capabilities, and a customizable GUI. Log Server and Network Analyzer can also easily integrate with XI, which integrates with Fusion to give you a centralized view of your networks.

A step up from the Standard Edition of XI, the Enterprise Edition has all standard features plus additional features, such as capacity planning, bulk modification, and scheduled reports.

Yes. Log Server and Network Analyzer can easily integrate with XI, which integrates with Fusion to give you a centralized view of your networks.

All our commercial solutions are supported by our team of professionals. Access to Answer Hub is included in the base license price of each solution. Phone support contracts are also available for customers who require additional support services.

The initial purchase of any of our commercial solutions includes the first year of license benefits. These benefits allow customers to access version upgrades for one year, submit up to ten support cases, and access the Answer Hub.

Yes, we distribute our commercial solutions as a virtual machine to ensure you get it up and running quickly. Manual installation is possible for physical servers running RHEL or CentOS and is available to customers that require it.