You can refer to this documentation for full details:

Here is a direct link to the PDF as well:

How To Monitor Devices With Nagios XI

You can also refer to this documentation for full details:

Here is a direct link to the PDF as well:

Monitoring Linode Instances with Nagios XI

Why Use the Hyper-V Configuration Wizard?

The Hyper-V Configuration Wizard allows you to track a range of valuable metrics on Hyper-V, such as CPU usage, memory utilization, storage performance, and network activity. Using the Nagios Cross-Platform Agent (NCPA), it delivers real-time insights in just a few clicks.

• Easy Setup: Launch the wizard from Configure → Configuration Wizards → Hyper-V, input your host’s IP/FQDN and NCPA token, and select metrics.
• Actionable Insights: Monitor key performance counters to catch issues before they impact your environment.
• Custom Alerts: Set warning and critical thresholds tailored to your needs.
• Scalable Monitoring: Manage multiple Hyper-V hosts and VMs from a single, intuitive dashboard.

Metrics You Can Monitor

The Hyper-V Configuration Wizard allows you to track a range of valuable metrics on Hyper-V, such as:

• CPU: Logical/Virtual Processor Run Time, Context Switches/sec
• Memory: Dynamic Memory Balancer, Available Bytes
• Network: Interface Bytes Total/sec, Virtual Switch Bandwidth
• Local Storage: Avg. Disk sec/Read/Write, Free Megabytes
• Virtual Storage: VM Read/Write Bytes/sec, Operations/sec
• High-Availability Storage: Cluster Shared Volume Latency, I/O Requests/sec

Select your desired metrics thresholds in the wizard.

Getting Started

1. Install NCPA: Download and install the NCPA agent on your Hyper-V host (NCPA Installation Instructions).

2. Launch the Wizard: Navigate to Configure → Configuration Wizards → Hyper-V in Nagios XI.

3. Start Monitoring: Select metrics, set thresholds, and apply your configuration.

Explore these resources for more details:

• Video Tutorial: Nagios XI Hyper-V Monitoring Demo
• Documentation: How To Monitor Hyper-V With Nagios XI 2024
• Support: Nagios Support Forum and Knowledge Base

Stay Ahead with Nagios XI

With the Hyper-V Configuration Wizard, you can monitor your Hyper-V environment effortlessly, ensuring optimal performance and reliability. Start today and keep your virtual infrastructure running smoothly!

Getting to the NCPA Web GUI

To access the GUI, simply install NCPA on a system, then navigate to the following in your browser, replacing <NCPA.Host.IP.Address> with the IP address of the host:

https://<NCPA.Host.IP.Address>:5693

You may need to add a security exception in your browser since NCPA is using a self-signed certificate to provide encrypted HTTPS access to the GUI.

Exploring the GUI

Home

The GUI starts out simple enough with the main Dashboard. This page shows NCPA agent information, monitored system information, and an overview of the total checks run by NCPA over the previous 30 days.

Checks

In this menu, you can review and check results for the last 30 days. This data is stored automatically by NCPA on the host and can be filtered by Status and Type.

Live Data

The Live Data section provides a real-time look a CPU, Memory, Disk, and Interface Graphs on the Stats Graphs page, as well as a Top Processes section.

Stats Graphs

Top Processes

This section of Live Data provides a way to see process CPU and memory usage in real time. You can choose to highlight the name of a specific process in the results and define Warning and Critical thresholds to color-code those processes that exceed your defined limits.

Check API

One of the most powerful features of NCPA is the check API, which can be explored and tested in the web GUI.

A great aspect of the NCPA API is that it works the same way across platforms, so the way you’ll write check commands to poll API endpoints is uniform whether the host you’re checking is Windows, Linux, or OSX.

In the API section of the NCPA web GUI, you can dig into all of the endpoints and run checks using them to not only review the JSON output but also to run them as Nagios checks. It’s even possible to generate a full check command for the endpoint to use in Nagios XI or Nagios Core by selecting the options highlighted in green here:

You can learn more about the NCPA API in this section of the NCPA v3 documentation:

NCPA API Overview

Nagios Log Server Integration

Log Server comes pre-loaded with NCPA, bundled with a couple of great plugins to help you monitor JVM heap and cluster status (you’ll see these in the Plugins section at the bottom of Step 2 of the NCPA Wizard in Nagios XI).

You can access the NCPA web GUI, view and update your NCPA token, and start/stop/restart the service in the Admin > Monitor Backend menu.

If you’d like to learn more about monitoring your Log Server cluster with NCPA, take a look at this article:

Nagios Network Analyzer Integration

Although not specifically an NCPA Web GUI feature, it’s worth noting that Network Analyzer uses NCPA for its Route function, using data collected by NCPA with the check_traceroute.py plugin:

You can learn more about setting up route monitoring here:

How to Set Up Route Monitoring in Nagios Network Analyzer

Getting Started with NCPA

If you’re not already using NCPA, you can find details on installation, NCPA wizard usage, and passive check configuration here:

Nagios XI Admin Guide – NCPA

When it comes to delivering proactive IT services, few companies walk the walk like Sweden-based Rely IT. From managing entire office networks to building custom software for industry-specific needs, Rely IT has carved out a reputation for being reliable, responsive, and forward-thinking. But like many fast-growing service providers, they eventually hit a wall with their legacy monitoring tools — tools that were too costly to scale and too rigid to adapt to evolving client expectations.

So how did they overcome these challenges and turn IT monitoring into a competitive advantage? The answer lies in a strategic shift to Nagios XI.

Who Is Rely IT?

Rely IT is a Swedish consultancy and managed IT service provider that supports businesses across Europe with a full suite of IT services. Their approach is built around one goal: letting customers focus on their business, not on IT headaches. Whether it’s building out infrastructure, providing support, or developing custom tools, their team handles it all.

But great service requires great tools behind the scenes. As customer demands increased and monitoring needs became more complex, Rely IT knew they had to make a change.

The Challenge: Outdated Tools, High Costs, and Scalability Issues

Like many growing IT providers, Rely IT started with a monitoring platform that worked fine at first — until it didn’t. The tool became a bottleneck: expensive to scale, difficult to configure, and lacking the flexibility needed for diverse client environments.

“We were using a solution that was expensive and clunky to scale,” said Kenneth Hagstrom, co-founder of Rely IT. “I’d been aware of Nagios for nearly 20 years, and we decided it was time to make the switch.”

Their search led them to a flexible, powerful solution: Nagios XI, backed by the open-source strength of Nagios Core.

The Solution: A Tailored Approach with Nagios Core and Nagios XI

One of the things that made Nagios the perfect fit for Rely IT was its scalability and modular design. Rather than forcing every customer into the same toolset, Rely IT could tailor their approach:

• For smaller clients or simple environments, Nagios Core provided lightweight, open-source monitoring with essential features and email alerts.
• For complex environments — including Rely IT’s internal infrastructure — they rolled out Nagios XI, the full-featured commercial offering.

“We use Nagios Core where customers need something basic and reliable,” Hagstrom explained. “But Nagios XI is where the real magic happens. It’s robust, flexible, and gives us everything we need to deliver high-quality service at scale.”

What Makes Nagios XI So Powerful?

Nagios XI takes the trusted foundation of Nagios Core and adds layers of usability and intelligence. For a service provider like Rely IT, this meant:

• Custom dashboards tailored to each customer’s critical systems
• Advanced reporting tools for insights, audits, and planning
• Preconfigured wizards to accelerate deployment
• Multi-tenancy support to manage multiple clients seamlessly
• Extensive plugin compatibility for custom checks
• An open API for automation and third-party integrations

These features empower Rely IT’s technicians to move faster and troubleshoot smarter. But perhaps more importantly, it gives their customers peace of mind — knowing problems will be spotted before they disrupt business.

Real-World Impact: Keeping Sweden’s Ferries Running Smoothly

One of Rely IT’s most impactful success stories involves a major Swedish ferry company that moves over 30,000 passengers per day. Rely IT uses Nagios XI to monitor every facet of the operation, including:

• Paper levels in ticketing machines
• Camera systems for license plate recognition
• Payment systems and back-end processing

“They rely on us to keep everything running from morning to night,” said Hagstrom. “And we rely on Nagios XI. With the level of visibility we get, we’ve saved them money, prevented outages, and helped their IT stay in complete control.”

Faster Deployment with the Nagios Cross-Platform Agent (NCPA)

Another game-changer for Rely IT was the Nagios Cross-Platform Agent (NCPA) — a lightweight agent that works across Windows, Linux, and macOS. It simplifies setup, enables remote checks, and allows even non-developers to create useful monitoring configurations.

“I’m not a coder, but even I can create solid plugins and examples with NCPA,” Hagstrom noted. “It’s made onboarding new clients a breeze. I wish we had adopted it earlier.”

The Results: Lower Costs, Happier Clients, and Proactive Service

Since adopting Nagios XI, Rely IT has seen improvements across the board:

• Reduced monitoring costs through automation and reusable configurations
• Faster setup times and onboarding for new clients
• Deeper reporting that helps customers make informed decisions
• Proactive service that prevents downtime before users notice issues

“We’re the ones calling the customer to say, ‘Hey, your internet is down’ — before they even realize it,” said Hagstrom. “That kind of responsiveness has become our brand, and Nagios is a huge part of that.”

Why Nagios XI Is a Smart Move for IT Providers

For IT teams and MSPs looking to deliver more value without ballooning costs, Nagios XI offers a compelling path forward. Its balance of power, flexibility, and ease of use makes it ideal for environments where uptime, insight, and client satisfaction are non-negotiable.

Ready to Modernize Your Monitoring?

If you’re tired of rigid tools that cost too much and deliver too little, follow Rely IT’s lead.

Explore how Nagios XI can help you deliver smarter, faster, and more proactive IT services: Discover Nagios XI

To learn about more ways Nagios can solve real life problems, check out our other Nagios Success Stories

Getting Started the Easy Way

The great thing about using NCPA to monitor your Log Server instances is that it’s already built in. You can navigate to Admin > Management > Monitor Backend to view the details:

Here you can view and modify your NCPA token, check the status of NCPA on each instance, start/stop/restart NCPA on them, and quickly access the NCPA web interface.

Clicking the Open NCPA Interface button will bring you to the agent Web UI, where you can view live data graphs of CPU, memory, disk, and interface usage, along with top process details. Here you can also review status history and leverage the check API.

Special OpenSearch Plugins

The NCPA Monitoring Wizard in Nagios XI will allow you to quickly monitor a variety of key metrics on your Log Server instances. This ensures that key resources, such as CPU and drive space, are not being overused, and it verifies that essential services like OpenSearch and Logstash are running. One metric that can be a little tricky with Log Server is memory usage, and that’s where NCPA shines. At the bottom of the NCPA Wizard, you’ll notice that two special plugins are bundled with the agent for you: check_os_jvm_heap.sh and check_os_cluster_status.sh.

OpenSearch by design pulls aside and places in reserve as much memory as it reasonably can on each instance, and whether it’s using it or not, this will show as memory usage when viewed via the standard NCPA memory check. That’s where check_os_jvm_heap.sh comes in. This special plugin will show you how much of the reserved memory is actually being used, serving as a much more useful perspective on memory usage. In this screenshot from a Nagios XI dashboard, you can see that although raw memory usage is on the high side, JVM heap usage is within reasonable boundaries:

The check_os_cluster_status.sh Plugin also adds context to your monitoring by providing insight into the state of your Log Server cluster as a whole. If all instances are operational, this will show as Green/OK. If one or more instances have failed, but at least one remains operational, it will show as Yellow/Warning. Although Log Server is still functional, you no longer have clustered redundancy. Note that this mirrors the status shown in the Cluster Health section of Log Server’s Admin > Cluster Status menu. Also, note that in a single instance setup, this will always show as Yellow. To achieve Green status, simply add at least one additional instance to your setup.

Advanced Monitoring

Nagios Business Process Intelligence (BPI) can be used to further enhance your Log Server cluster monitoring. BPI enables you to combine all of the instances into a logical group that will alert you intelligently based not just on individual instance health but the status and functionality of the cluster as a whole.

Here’s an article that provides a detailed example of this approach, which involves nesting groups representing the status of each instance under the umbrella of a group showing the overall operational status of the cluster:

Nagios XI BPI: Actionable Insights for IT Monitoring and Optimization

By harnessing NCPA to monitor your Log Server cluster with Nagios XI, and especially when combined with the power of BPI, you’ll have everything you need to ensure the peak performance of your instances and cluster.

Additional Resources

Nagios Log Server Admin Guide

Nagios XI Admin Guide

NCPA Help Reference

Prerequisites

Ensure you have:

• A Pop!_OS 24.04 LTS system with sudo privileges
• An operational Nagios XI server
• Network connectivity between Pop!_OS and Nagios XI (Port 5693 open)
• Stable internet access for downloading required packages

Step 1: Install NCPA Using DEB Package

Since Pop!_OS is Ubuntu-based, the DEB package method is recommended:

cd /tmp
wget https://assets.nagios.com/downloads/ncpa3/ncpa-latest.amd64.deb
sudo dpkg -i ncpa-latest.amd64.deb

cd /tmp
wget https://assets.nagios.com/downloads/ncpa3/ncpa-latest.amd64.deb
sudo dpkg -i ncpa-latest.amd64.deb

Resolve dependency issues if encountered:

sudo apt-get install -f

sudo apt-get install -f

Step 2: Configure NCPA Token

NCPA requires an authentication token (community string):

sudo nano /usr/local/ncpa/etc/ncpa.cfg

sudo nano /usr/local/ncpa/etc/ncpa.cfg

Modify the line:

community_string = mytoken

community_string = mytoken

to a secure, unique token:

community_string = Str0ngT0k3n2025

community_string = Str0ngT0k3n2025

Save the file and exit (Ctrl+O, Enter, Ctrl+X).

Step 3: Restart NCPA Service

Apply the new configuration:

sudo systemctl restart ncpa
sudo systemctl status ncpa

sudo systemctl restart ncpa
sudo systemctl status ncpa

Ensure the service shows as active (running).

Step 4: Configure Firewall

Allow NCPA communication on port 5693:

sudo ufw allow 5693/tcp
sudo ufw reload

sudo ufw allow 5693/tcp
sudo ufw reload

Step 5: Test NCPA Interface

Open your browser and navigate to:

https://<PopOS-IP>:5693/

https://<PopOS-IP>:5693/

Accept SSL warnings (self-signed certificate). Login using your token (Str0ngT0k3n2025) to access the NCPA dashboard.

Step 6: Integrate Pop!_OS Host into Nagios XI

1. Log into Nagios XI.
2. Navigate to Configure > Configuration Wizards.
3. Select NCPA from the wizard list.
4. Input the following details:
   • Host IP: Your Pop!_OS machine’s IP
   • Token: Str0ngT0k3n2025
   • Port: 5693
5. Select desired metrics for monitoring (CPU, Memory, Disk, Processes).
6. Complete the wizard and apply the configuration.

Verify the host addition by navigating to Monitoring > Hosts.

Troubleshooting

• NCPA not running:

sudo systemctl restart ncpa
sudo systemctl status ncpa

sudo systemctl restart ncpa
sudo systemctl status ncpa

• Firewall Issues:

sudo ufw status | grep 5693

sudo ufw status | grep 5693

• Token mismatch:

sudo nano /usr/local/ncpa/etc/ncpa.cfg

sudo nano /usr/local/ncpa/etc/ncpa.cfg

Confirm your token matches the Nagios XI configuration.

• Checking logs:

cat /usr/local/ncpa/var/log/ncpa.log

cat /usr/local/ncpa/var/log/ncpa.log

Conclusion

You have successfully configured NCPA on Pop!_OS 24.04 LTS and integrated it with Nagios XI. This setup ensures proactive monitoring and quick troubleshooting of system performance and health issues. For more advanced capabilities, explore passive checks and custom plugins available through the Nagios Knowledgebase and the NCPA documentation.

Prerequisites

Key factors before beginning the guide:

• A system running Kali Linux
• Nagios XI instance to access the web interface
• Root or sudo access for advanced operations
• Internet access to download packages

Step 1: Download NCPA

First, you need to install the NCPA agent on your Kali Linux machine. You can download the NCPA package from the Nagios website and use the DEB file to download that is based on Debian.

Open your terminal and update your packages.

sudo apt update

sudo apt update

Use wget and curl to put the URL for the NCPA link that you downloaded from the Nagios website.

wget https://assets.nagios.com/downloads/ncpa3/ncpa-latest-1.amd64.deb

wget https://assets.nagios.com/downloads/ncpa3/ncpa-latest-1.amd64.deb

curl -LO https://assets.nagios.com/downloads/ncpa3/ncpa-latest-1.amd64.deb

curl -LO https://assets.nagios.com/downloads/ncpa3/ncpa-latest-1.amd64.deb

Step 2: Install NCPA

Use the dpkg command to install the package of the downloaded DEB package.

sudo dpkg -i ncpa-latest-1.amd64.deb

sudo dpkg -i ncpa-latest-1.amd64.deb

If you encounter dependency issues, you might need to run this command.

sudo apt-get install -f

sudo apt-get install -f

Step 3: Configure NCPA

After installation, configure the NCPA agent by editing the ncpa.cfg file, typically located in /usr/local/ncpa/etc/. Set the necessary parameters, such as the token for authentication.

sudo nano /usr/local/ncpa/etc/ncpa.cfg

sudo nano /usr/local/ncpa/etc/ncpa.cfg

Find the line that says community_string and set it to a secure token by changing mytoken to your unique token under the [listener] section.

community_string = mytoken

community_string = mytoken

After making this change, save and close the file.

Step 4: Start and Enable NCPA

Restart and enable the NCPA service to start automatically at boot.

sudo systemctl restart ncpa
sudo systemctl enable ncpa

sudo systemctl restart ncpa
sudo systemctl enable ncpa

Step 5: Allow NCPA Port in Firewall

If your firewall is enabled, you’ll need to allow traffic on port 5693 using ufw.

sudo ufw allow 5693/tcp
sudo ufw reload

sudo ufw allow 5693/tcp
sudo ufw reload

Step 6: Test NCPA on the Web Interface

Test the NCPA functionally by visiting the NCPA web interface via a browser to see if it is working. Enter the URL from the address bar and change NCPA_IP_Address to your Kali Linux IP address or use 0.0.0.0. Furthermore, 5693 is the default port number.

https://<NCPA_IP_Address>:5693/

https://<NCPA_IP_Address>:5693/

There will be a security popup when you’re trying to access the NCPA webpage; you can skip this by clicking Advanced and then clicking Accept the Risk and Continue.

Login to the NCPA web GUI by using your token you used for your community string.

Once you’ve logged in, you can use the NCPA web interface to check out the various functionalities for monitoring your Kali Linux system.

Step 7: Configure NCPA to Nagios XI

Use your Nagios XI server to log in to the web interface.

Navigate to the Configure tab from the gear icon to the Configuration Wizards page and look for Linux Server to incorporate the NCPA monitoring on Nagios XI.

Configure your NCPA wizard by providing the IP address from your Kali Linux machine and the token for the authentication that you configured earlier.

Set up the rest of the configuration by selecting the specific checks you want to perform on your Kali Linux machine, such as CPU usage, memory usage, disk space, and more.

Finish the wizard by applying the configuration and saving the changes to start monitoring your Kali Linux device.

Step 8: Verify your Status

Verify the status of your NCPA monitoring by navigating to the status page on your home dashboard. This will allow you to check if the NCPA agent is running correctly on your Kali Linux machine within Nagios XI.

Troubleshooting

If you have any issues setting up NCPA for Kali Linux, here is a list of what to troubleshoot.

Connection Issues

• Verify that the NCPA service is running on the Kali Linux machine.
• Check the firewall settings on both the Kali Linux machine and any network firewalls.
• Ensure that the Nagios XI server can reach the Kali Linux machine on port 5693.
• Test the connection from the Nagios XI server using telnet 5693.

Authentication Issues

• Double-check the password you entered in the Nagios XI wizard.
• Verify that the password in /etc/ncpa.cfg matches the password you entered in Nagios XI.

Check Errors

• Check the NCPA logs on the Kali Linux machine for any errors (/var/log/ncpa_listener.log).
• Run the NCPA checks manually on the Kali Linux machine to verify that they are working correctly.
• Example:

/usr/local/ncpa/plugins/check_ncpa.py -H 127.0.0.1 -t '' -M 'cpu/percent'

/usr/local/ncpa/plugins/check_ncpa.py -H 127.0.0.1 -t '' -M 'cpu/percent'

Plugin Permissions

• Ensure that the Nagios user on the Nagios XI server has the correct permissions to execute the NCPA plugins.

Conclusion

By following these instructions, you should be able to successfully integrate NCPA on Kali Linux with Nagios XI, enabling effective system monitoring. This setup will help you track vital metrics, ensure optimal performance, and address potential issues promptly. If you have additional questions or other support-related questions, please visit us at our Nagios Support Forum, Nagios Knowledge Base, or Nagios Library.

Step 1: Install NCPA on openSUSE 15

Option 1: Using Nagios Repository (Recommended)

• Add the Nagios repository for SUSE 15+ (available from https://repo.nagios.com).
• Run:

 sudo zypper install ncpa

 sudo zypper install ncpa

Option 2: Manual RPM Installation

• Run the following:

cd /tmp wget https://assets.nagios.com/downloads/ncpa3/ncpa-<version>.rpm sudo rpm -ivh ncpa-<version>.rpm

cd /tmp wget https://assets.nagios.com/downloads/ncpa3/ncpa-<version>.rpm sudo rpm -ivh ncpa-<version>.rpm

Step 2: Configure NCPA

1. Edit the configuration file:

sudo vi /usr/local/ncpa/etc/ncpa.cfg

sudo vi /usr/local/ncpa/etc/ncpa.cfg

2. Set a secure token by modifying:

community_string = Str0ngT0k3n

community_string = Str0ngT0k3n

3. Save and exit (:wq).

Step 3: Restart the NCPA Service

sudo systemctl restart ncpa

sudo systemctl restart ncpa

Step 4: Allow NCPA Port Through the Firewall

sudo firewall-cmd --zone=public --add-port=5693/tcp
sudo firewall-cmd --zone=public --add-port=5693/tcp --permanent

sudo firewall-cmd --zone=public --add-port=5693/tcp
sudo firewall-cmd --zone=public --add-port=5693/tcp --permanent

Step 5: Verify the NCPA Web Interface

1. Open a web browser and go to:

https://<openSUSE-IP>:5693

https://<openSUSE-IP>:5693

2. Accept any SSL warnings.

3. Log in using your configured token.

Step 6: Add the Host in Nagios XI

1. Log in to Nagios XI.
2. Navigate to Configure > Monitoring Wizard > NCPA.
3. Enter your openSUSE IP and token.
4. Select services (CPU, memory, etc.) to monitor.
5. Complete the wizard to apply monitoring.

Final Tip

• NCPA listens on TCP port 5693.
• Use a strong token to prevent unauthorized access.
• The NCPA web interface includes built-in help and endpoint documentation.

Conclusion

By following this guide, you can successfully monitor openSUSE 15 with Nagios XI using NCPA. This setup allows you to track essential system metrics efficiently and receive alerts on performance issues. Regularly check Nagios XI dashboards to ensure accurate data collection and troubleshoot any connectivity issues by reviewing firewall rules and service statuses.

This guide details how to install NCPA on Clear Linux and configure it for monitoring within Nagios XI, adapting to Clear Linux’s unique environment.

Prerequisites

Ensure:

• A Clear Linux system (updated with sudo swupd update) with sudo access.
• A running Nagios XI instance (latest version recommended).
• Network connectivity between Clear Linux and Nagios XI (port 5693 open).
• Basic utilities installed: curl, rpm2cpio, cpio, and python3 (Clear Linux includes Python by default).

Step 1: Install Required Tools

Clear Linux doesn’t include rpm2cpio or cpio by default. Install them:

sudo swupd bundle-add dev-utils

Verify:

rpm2cpio --version
cpio --version

Step 2: Download and Extract NCPA

Since Clear Linux doesn’t support RPM packages natively, extract the NCPA RPM manually:

1. Create a Working Directory:

mkdir -p ~/ncpa && cd ~/ncpa

2. Download the Latest-1 NCPA RPM:

curl -O https://assets.nagios.com/downloads/ncpa3/latest-1/ncpa-latest.el9.x86_64.rpm

3. Extract the RPM:

rpm2cpio ncpa-latest.el9.x86_64.rpm | cpio -idmv

Step 3: Deploy NCPA Files

Move the extracted files to their appropriate system locations:

sudo cp -r ./usr/* /usr/
sudo cp -r ./etc/* /etc/
sudo cp -r ./var/* /var/

Step 4: Configure the NCPA Token

1. Edit the Config File:

sudo nano /usr/local/ncpa/etc/ncpa.cfg

2. Set a Secure Token:

community_string = Str0ngT0k3n2025

Step 5: Start the NCPA Listener

Option 1: Manual Start

sudo /usr/local/ncpa/ncpa_listener &

Option 2: Create a Systemd Service

1. Create a service file:

sudo nano /etc/systemd/system/ncpa.service

2. Add:

[Unit]
Description=NCPA Listener Service
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/ncpa/ncpa_listener
Restart=on-failure

[Install]
WantedBy=multi-user.target

3. Enable and start:

sudo systemctl daemon-reload
sudo systemctl enable ncpa
sudo systemctl start ncpa

4. Verify:

sudo systemctl status ncpa

Step 6: Configure the Firewall

1. Add Rule:

sudo iptables -I INPUT -p tcp --dport 5693 -j ACCEPT

2. Persist the Rule:

sudo mkdir -p /etc/iptables sudo iptables-save > /etc/iptables/rules.v4

3. Verify:

sudo iptables -L -n | grep 5693

Step 7: Test NCPA Locally

1. Access the NCPA Web Interface:

https://<ClearLinux-IP>:5693/

2. Accept Certificate

3. Log In:

• Use the token (e.g., Str0ngT0k3n2025) to access the dashboard.

Step 8: Integrate with Nagios XI

1. Log into Nagios XI
2. Run the NCPA Wizard
3. Configure the Host:
   • IP Address: Clear Linux IP
   • Port: 5693
   • Token: Str0ngT0k3n2025
4. Apply Configuration
5. Verify Monitoring

Troubleshooting Tips

• NCPA Not Running:

ps aux | grep ncpa_listener
sudo systemctl status ncpa
cat /usr/local/ncpa/var/log/ncpa.log

• Port Blocked:

sudo nc -zv <ClearLinux-IP> 5693

• Nagios XI Issues:
  • Verify token and IP
  • Check Nagios log: /usr/local/nagiosxi/var/ncpa.log

Conclusion

You’ve manually installed NCPA on Clear Linux and integrated it with Nagios XI. While Clear Linux lacks official NCPA support, this workaround enables robust monitoring. For stability, maintain the systemd service and firewall persistence. Explore passive checks via NRDP or custom plugins.

Resources:

• Nagios NCPA Project
• Nagios Support Forum
• Nagios Knowledgebase