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Analyzing Logs With Nagios Log Server
This article covers how to analyze logs with Nagios Log Server. Basically, in order to analyze logs with Nagios Log Server one needs to be familiar with the options in the Dashboards menu. This guide is very essential to Nagios Log Server administrators and users looking for information on querying, filtering and drilling down the data in Nagios Log Server.
You can audit your IT infrastructure, maintain historical records of usage of IT infrastructure, create reports, and analyze logs using the Nagios Log Server.
Hardening Windows Using Microsoft Security Baseline
This article covers Hardening Windows Using Microsoft Security Baseline.
Every organization faces security threats. However, the types of security threats that are of most concern to one organization can be completely different from another organization. For example, an e-commerce company may focus on protecting its Internet-facing web apps, while a hospital may focus on protecting confidential patient information.
The one thing that all organizations have in common is a need to keep their apps and devices secure. These devices must be compliant with the security standards (or security baselines) defined by the organization.
A security baseline is a group of Microsoft-recommended configuration settings that explains their security impact. These settings are based on feedback from Microsoft security engineering teams, product groups, partners, and customers.
How can you use security baselines?
You can use security baselines to:
1. Ensure that user and device configuration settings are compliant with the baseline.
2. Set configuration settings. For example, you can use Group Policy, Microsoft Endpoint Configuration Manager, or Microsoft Intune to configure a device with the setting values specified in the baseline.
Access denied to VNC Server - How to fix this error ?
This article covers methods to fix the error, Access denied to VNC Server. Basically, this error occurs while trying to connect to a VNC server using a cloud connection. This message means that your RealVNC account has been signed out of VNC Viewer.
This will happen if you have recently changed the password for your RealVNC account, for example.
To resolve this VNC connection issue, click Sign in again and enter your RealVNC account credentials.
Once you see a green tick/check mark in the top right next to your name, try connecting to the VNC Server again.
Install Docker CE on AlmaLinux 8 - Step by Step Process ?
This article covers the process of installing Docker CE on AlmaLinux. Docker is a popular virtualization platform for running applications in Containers.
It allows us to build and communicate containers with one on another.
To install Docker CE on AlmaLinux 8:
1. Add official Docker CE repository on your AlmaLinux 8, so that we can install it without downloading its packages manually.
$ sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
2. To let the system recognize the added Docker repository and the packages available in the same, run the system update that will force AlmaLinux to rebuild the system repo cache.
$ sudo dnf update
3. You can check the added repo including others of your system using the command.
$ sudo dnf repolist -v
4. Run the Command to Install Docker CE Engine.
$ sudo dnf install docker-ce docker-ce-cli containerd.io
5. Once the installation is completed, start the Docker service on your AlmaLinux and also enable it to run automatically with system boot.
$ sudo systemctl enable docker
$ sudo systemctl start docker
6. Check the Status of the Service to know it is working properly.
$ systemctl status docker
SNMP Trap Hardening in Nagios - How it Works ?
This article covers how to go about SNMP Trap Hardening in Nagios.
When using the vi editor:
1. To make changes press i on the keyboard first to enter insert mode
2. Press Esc to exit insert mode
3. When you have finished, save the changes in vi by typing :wq and press Enter
How to Send Test Trap ?
When working through this documentation you may want to test the changes by sending a test trap. The following KB article provides examples on how to send a test trap, which can be very helpful:
How To Send A SNMP Test Trap ?
When a test trap is received on the Nagios XI server it should be logged in the /var/log/snmptt/snmpttunknown.log file.
The default SNMP Trap configuration is stored in the /etc/snmp/snmptrapd.conf file and contains just two lines:
disableAuthorization yes
traphandle default /usr/sbin/snmptthandler
NRPE Command Plugin Not Defined - How to fix it ?
This article covers methods to resolve 'NRPE Command Plugin Not Defined' for our customers.
This error is very straight forward. Usually this is caused by a mismatch between the command name declared in Nagios XI to be check through NRPE and the actual command name of the command directive in the remote host's nrpe.cfg file.
This problem will occur in versions of check_nrpe before v3.
What is happening here is that the initial -c check_users is being overwritten by the -a -w 5 -c 10, as check_nrpe thinks the -c 10 argument is the command argument, not one of the -a arguments.
