Nagios XI:FAQs

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Answers to Frequently Asked Questions (FAQs) regarding Nagios XI can be found here.


What Are FAQS? Frequently Asked Questions, or "FAQs", are listed questions to frequently asked in some context, and pertain to a particular topic.

Fun Note: Since the acronym FAQ originated in textual media, its pronunciation varies - "fack," "fax," "facts," and "F.A.Q." are commonly heard. Depending on its usage, the term may refer specifically to a single frequently asked question, or to an assembled list of many questions and their answers.

Do these first

  • The nagiosadmin user was set to use the generic_template contact template, which resulted in notifications not being controlled through the XI interface.
    This can be corrected by changing the user's contact template to be xi_generic_template is the Core Config Manager. This bug was corrected in 2009R1.2 and only effects systems that had/have previous versions installed.

Distributed Monitoring

Is Nagios XI capable of Distributed Monitoring?

Yes, click here for the Distributed Monitoring Documentation

No graphs

This happens and there are a multitude of causes, but there are several simple solutions.

  • Reset Security Credentials
    under Admin -> left navbar, Reset Security Credentials -> click update
  • Reset File Permissions
    Instructions how.
  • Further reading
    Forum Article.

Core Config Manager Issues

Most of these are related to IE's implementation of JavaScript, if you can, use a browser that more closely implements the ECMAScript Language Specification. Microsoft's Internet Explore(tm) has a wonderful implementation of JScript that is not vary well suited to running applications written in the widely used ECMAScript based JavaScript.

Missing Email Alerts

This happens and there are a multitude of causes, but some of the solutions are simple .

  • nagiosadmin set to use generic_template
    Should be xi_generic_template is the core config manager. This bug was corrected in 1.2 and only effects systems that had/have previous versions installed.
  • Reset File Permissions
    Instructions how.


Upgrade to 1.2C and started getting an error about SourceGuardian. Add this to my /etc/php.ini or php.ini file located elsewhere file:



During an upgrade to 1.2c you may need to hold shift and click reload or whatever your browsers equivalent is to by-pass proxy servers and cached pages. I'm not sure how to say this... but I'm not talking about "clearing the temporary internet files" instead I'm talking about "hold shift and click reload".

Amazingly well documented procedures.

Login Redirecting

The web browser keeps redirecting to the login screen even after entering login credentials.

Nagios XI uses cookies to save session state. These cookies are set to expire after 30 minutes. If the time on the Nagios XI server is incorrect, the cookies returned to the client's browser might appear to be expired due to the time difference between the client's computer and the Nagios XI server. Solution: Fix the time on the Nagios XI server to ensure it is correct.

Deleting Hosts

Hosts can only be deleted after all of their dependent services have been deleted. This is to protect against accidental deletion of a large number of services.

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