Category Archives: Open Source

NagiosXI – How to reset nagiosadmin password

Posted on by
Reply

I have a NagiosXI server which i already 2 year never login. Recently one of the System Admin leaving the company and i have to take over back the NagiosXI server management. But i already forgot what is nagiosadmin password.

Lucky NagiosXI come with a lot of useful scripts which located at /usr/local/nagiosxi/scripts/

Here i going to show your guys how i reset the nagiosadmin password using NagiosXI script.

To do that, you have to ssh in to NagiosXI server and execute following command to reset nagiosadmin password

/usr/local/nagiosxi/scripts/reset_nagiosadmin_password.php --password=newpassword

If you wish to use any special  characters in your password, you should escape them with “\”. For example, if you want to set your new password to be “p@ssw0rd#”, then you can run:

/usr/local/nagiosxi/scripts/reset_nagiosadmin_password.php --password=p\@ssw0rd\#

After reset, you should able to login to your NagiosXI with your new password.

macOS Sierra – Error on SSH “no matching key exchange method found. Their offer: diffie-hellman-group1-sha1”

Posted on by
1

Issue

My latest MacOS X 10.12 release failed to ssh to network devices with the following error:

techkaki-MacBook-Pro:~ techkaki$ ssh aimsadm@10.10.178.243
Unable to negotiate with 10.10.178.243 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1

Root Cause

For error message above show that the client and server were unable to agree on the key exchange algorithm.

As per checking on my Mac OS X, i noticed that my Mac OS X running on OpenSSH version 7.

techkaki-MacBook-Pro:~ techkaki$ ssh -V
OpenSSH_7.4p1, LibreSSL 2.5.0

According to openssh website, some of the older algorithms are not enabled by default on OpenSSH Version 7 and above.

Solution

A) To enable the diffie-hellman-group1-sha1 key exchange algorithm  using the KexAlgorithms option:

ssh -o KexAlgorithms=+diffie-hellman-group1-sha1 aimsadm@10.10.143.82

B) Enable SHA1 on ssh_config by adding KexAlgorithms +diffie-hellman-group1-sha1 at the end of the ssh_config file.

sudo nano /etc/ssh/ssh_config

Screen Shot 2017-05-22 at 11.26.05 AM

Hope this information will help 🙂

Reference link:-

https://www.openssh.com/legacy.html

NagiosXI – SQL: SQL Error [ndoutils]

Posted on by
1

Problem Symptoms

Error “SQL: SQL Error [ndoutilsSQL: SQL Error [ndoutils]”

SQL-SQL Error

If you see above error when you logon the NagiosXi Server,  it may be a symptom of one or more crashed tables. The steps outlined below allow you to repair the MySQL database tables used by Nagios XI.

Repairing MySQL Tables

  • First, login to your Nagios XI server as the root user via SSH.
  • Run the Nagios XI database repair script with the following command:

cd /usr/local/nagiosxi/scripts
./repair_databases.sh

This process may take several minutes to complete, depending on the size of your database

If above step unable to solve the problem, you may have to contact Nagios support team