Home » Categories » Products » Nagios XI » Troubleshooting » Common Problems

Nagios XI - MSSQL Query Wizard - Invalid characters in the username

Problem Description

After running the MSSQL Query wizard your new service has an UNKNOWN state with the following error:

UNKNOWN: Invalid characters in the username.

 

This problem can occur when trying to connect using Windows authentication and your username is something like user\domain, it is complaining about the backslash (\).

 

 

Resolution

The check_mssql plugin can be updated to allow the backslash. Establish a terminal session to your Nagios XI server as the user root.

Execute the following command to open the /usr/local/nagios/libexec/check_mssql file in vi:

vi /usr/local/nagios/libexec/check_mssql

When using the vi editor, to make changes press i on the keyboard first to enter insert mode. Press Esc to exit insert mode.

 

Jump to line 347 by typing the following:

:347

and press Enter.

 

The line you are looking for should look like this:

if (!preg_match("/^[a-zA-Z0-9-_]{2,32}$/", $db_user)) {

 

Change it to (add \\\\):

if (!preg_match("/^[a-zA-Z0-9-_\\\\]{2,32}$/", $db_user)) {

 

When you have finished, save the changes in vi by typing:

:wq

and press Enter.

 

After making these changes go back into the XI web interface and force an immediate check of the service to test that it is working correctly.

 


 

Final Thoughts

For any support related questions please visit the Nagios Support Forums at:

http://support.nagios.com/forum/

0 (0)
Article Rating (No Votes)
Rate this article
  • Icon PDFExport to PDF
  • Icon MS-WordExport to MS Word
Attachments Attachments
There are no attachments for this article.
Related Articles RSS Feed
Nagios XI - Defining Global Environment Variables
Viewed 1971 times since Thu, Mar 17, 2016
Nagios XI - Debugging Bandwidth Performance Graphs
Viewed 2308 times since Tue, Jan 27, 2015
Nagios XI - Reset Upgrade Status In Web Interface
Viewed 2188 times since Tue, May 7, 2019
Nagios XI - NSP: Sorry Dave, I can’t let you do that
Viewed 5033 times since Tue, Jan 27, 2015
Nagios XI - HTTP 500 Error / PHP Parse error - Unexpected $end
Viewed 900 times since Mon, Jan 25, 2016
Nagios XI - Core Configuration Mananger Display Issues
Viewed 745 times since Tue, Jan 26, 2016
Nagios XI - Apply Configuration Never Completes
Viewed 3122 times since Tue, Jan 27, 2015
Nagios XI - Installing XI Fails To Install Dependency pymssql
Viewed 1168 times since Mon, Oct 17, 2016
Nagios XI - Migrate Performance Data
Viewed 1985 times since Tue, Jan 26, 2016
Nagios XI - WMI Authentication Problems
Viewed 1774 times since Thu, Feb 25, 2016