• A new Nutanix CE Wizard.
• A new Network Switch/Router Wizard and plugins.
• Nagios Network Analyzer Wizard upgrades.
• A wider range of SNMP security protocols.
• A new Toggle Global Status option for Smart Dashboards.

In this article we’ll take a quick look at each of these awesome updates and provide you with links to the related documentation.

New Network Switch/Router Wizard and Plugins

A brand new version of the Network Switch/Router Wizard has been added with several key enhancements:

• Greatly reduces the amount of walks performed on the machine, improving information stability and response time.
• Port throughput checks are compatible with Nagios Mod Gearman workers.
• New check_throughput and check_snmp_interface_status plugins written in C increase performance.

You can find the new wizard in the Configure > Configuration Tools > Configuration Wizards menu.

Note that the old wizard, which will remain available, will now be labeled Network Switch/Router (Legacy).

You can review the new documentation here:

• Monitoring Switches and Routers with Nagios XI 2026

New Nutanix Wizard

The new Nutanix CE Wizard enables you to monitor Nutanix Community Edition clusters, virtual machines, and host metrics via Prism Element. You can find it in the Configure > Configuration Tools > Configuration Wizards menu.

Here’s an example of the Cluster/Prism checks the wizard supports:

You can find the documentation here:

• Monitoring Nutanix CE with Nagios XI 2026

Network Analyzer Wizard Upgrades

The Nagios Network Analyzer Wizard has gotten two key upgrades for enhanced support of Network Analyzer 2026.

The wizard now supports the ability to use Traffic Profiles to filter data during Step 1 setup, as you can see here:

Additionally, Step 3 of the wizard now includes the ability to automatically create a Smart Dashboard of data from the Source or Group selected in Step 1:

Here’s a look at a fresh Smart Dashboard automatically created for an Apache web server source using the new Create Smart Dashboard option:

You can find the updated documentation here:

• Integrating Network Analyzer 2026 with Nagios XI 2026

SNMP Security Updates

A variety of new security protocol options have been added to the Authentication Protocol and Privacy Protocol dropdowns in the SNMP Walk Jobs tool and the SNMP Wizard. This new support for a wider range of encryption protocols provides enhanced security options for your SNMP checks.

Global Dashboard Management

You’ll notice a new option in the individual Dashboard actions, and in the Manage Smart Dashboards menu options called Toggle Global Status. This option enables you to easily share dashboards with other users, or switch them from globally available to a personal dashboard:

Changelog

XI 2026R1.4 also includes a wide variety of other fixes and updates.

To review all the changes in detail, including security fixes, you can view the full changelog here:

• Nagios XI Changelog

Free 30-Day Trial Download

If you’re new to Nagios XI and want to take 2026R1.4 for a spin, you can download the free trial version here:

• Nagios XI Downloads

You can also refer to this documentation for full details:

Here is a direct link to the PDF as well:

Monitoring-SNMP-with-Nagios-XI.pdf

You can refer to this documentation for full details:

Here is a direct link to the PDF as well:

Monitoring Linux using SNMP in Nagios XI

You can also refer to this documentation for full details:

Here is a direct link to the PDF as well:

Using-The-SNMP-Walk-Wizard

This video provides a guided walk-through covering each step of how to Monitor Windows 11 with SNMP in Nagios XI:

You can also refer to this documentation for full details:

Here is a direct link to the PDF as well:

How To Monitor Windows Using SNMP With Nagios XI.pdf

SNMP capabilities are ubiquitous across the critical elements of your deployment, and the protocol quantifies countless metrics that can be monitored to keep an eye on the status and performance of both legacy and modern equipment in your infrastructure.

Active SNMP checks, where Nagios XI polls OIDs (Object IDs) for data, tend to be fairly accessible, especially using built-in tools like the Network Switch and Router Wizard. But what about SNMP traps? As powerful as this passive approach to SNMP monitoring is, providing rapid results when events occur, traps can be difficult to configure for monitoring. That’s where NXTI (the Nagios XI SNMP Trap Interface) comes in.

Without NXTI

On the plus side, Nagios XI is fully capable of monitoring, alerting, and reporting on SNMP traps even in the Standard edition. However, trap definitions are handled on the command line with flat text files, which adds an additional layer of complexity to an already complicated monitoring method. If you’re a command line wiz and know traps well, this may not be a roadblock, but for everyone else the value of NXTI is huge, making trap monitoring more accessible.

The NXTI Advantage

NXTI provides a way to manage your trap settings right from the Nagios XI GUI, enabling you to:

• View, Add, Edit, Copy, Delete, and Disable trap definitions.
• Configure passive checks based on traps.
• View and Delete received trap logs.
• Search and sort both trap definitions and received trap logs.
• Monitor the snmptt process.
• Locally test snmptrapd/snmptt functionality.

Quite simply, NXTI helps you go from this:

To this:

Note that in order to monitor incoming traps that match your trap definition, you’ll need to check the Enable Passive Service Setup checkbox.

You can then run the SNMP Trap Wizard to begin monitoring the traps. If for some reason you do not see status results in the SNMP trap service you set up for traps you’ve received, check in Admin > Monitoring Config > Unconfigured Objects, in case there is a mismatch between the IP/FQDN you set in Nagios for the target host and the IP/FQDN contained in the trap.

The Advanced Section

The Advanced tab of NXTI (at the top right of the NXTI menu) provides a variety of useful functions, including the ability to add an example trap definition, to send a test trap, and even to send a custom test trap for more specific testing of trap features and functions. It also provides a way to view the Unknown Trap Log, which lists any traps XI receives that don’t have a matching trap definition.

To learn more about managing SNMP traps with NXTI, you can refer to the complete guide:

SNMP Traps with NXTI in Nagios XI

If you’d like to learn more about everything SNMP, this excellent video series is a great resource:

Nagios XI SNMP Monitoring Series

The resources on managing MIBs (SNMP Management Information Bases) may come in handy as well:

Nagios XI MIBs Architecture

Finally, you can dig into the entire set of Enterprise Edition features here:

Audit Log

The Audit Log provides easy access to details on interactions with the user interface, Core Config Manager, subsystems, API, Core engine, and other elements of the Nagios XI application. Results can be filtered by time, source, type, and user, and downloaded as a CSV or PDF file. You’ll also notice a Send to Nagios Log Server button, which makes forwarding these logs upstream to your Log Server setup a breeze.

BPI

Although BPI (Business Process Intelligence) is included in the Standard Edition, the Enterprise Edition adds the ability to automatically sync your hostgroups and servicegroups into BPI groups, providing a way to get further value out of time spent carefully cultivating your groups.

To learn more about using BPI, you can review the Using BPI guide.

You can find a detailed cluster monitoring with BPI use-case example here.

Bulk Modification and Bulk Renaming

The Bulk Modifications Tool has long been a favorite of Enterprise Edition users, especially those with large and dynamic environments. The tool enables you to quickly modify a key setting on as many hosts or services as you’d like with a few clicks.

Bulk Renaming not only provides a way to rename many objects at once, but even better (unlike renaming one-at-a-time in the Core Config Manager) ensures that your historical performance data is retained even after changing the name of an object.

Capacity Planning

Capacity Planning is another user favorite. This Enterprise Edition feature enables you to project future resource usage based on collected historical performance data. The projections can be viewed in graphs, added to dashboards, made into reports, and even monitored using the Capacity Planning Wizard. This will empower you to run maintenance on and allocate additional resources to your equipment before it becomes overloaded.

You can learn more about using Capacity Planning in Nagios XI 2024 here:

Deadpool

In dynamic environments, the Deadpool can be a major timesaver. This feature provides a way to automatically decommission hosts and services that have been in a problem state for a customizable amount of time. Stage 1 automatically stops notifications, then Stage 2 can be set to either delete (remove entirely) or deactivate (mark ‘inactive’, thus stopping the Core engine from monitoring but leaving the config in the Core Config Manager).

Full details on using the Deadpool can be found here.

Scheduled Pages and Reports

The Standard Edition already provides a lot of value by making emailing and downloading individual reports quick and easy, but have you ever dreamed of automating report delivery? With Scheduled Pages and Reports, you’ll be able to accomplish this with ease, setting XI to send key reports to teams and managers on whichever frequency you choose.

You can learn more about page and report scheduling options here.

SLA Report

Speaking of reports, the SLA Report is another great Enterprise Edition feature. Simply choose the time period to report on, narrow down the results to the specific hosts, services, or groups, and enter your SLA target for immediate insight into SLA status.

Full details on using the SLA Report can be found here.

Notification Management

For admins with large teams, the Notification Management feature can be a big timesaver. This tool provides a way to template notification messages, preferences, and time periods, then deploy them to many users at once.

SNMP Trap Interface (NXTI)

SNMP Traps are a powerful way to passively monitor a broad array of devices and applications, but can be challenging to integrate into your monitoring, especially from the command line. NXTI provides a GUI-driven option to help you leverage SNMP Traps with Nagios XI.

NXTI provides the following capabilities:

• View, Add, Edit, Copy, Delete, and Disable trap definitions.
• View and Delete received trap logs.
• Search and sort both trap definitions and received trap logs.
• Monitor the snmptt process.
• Locally test snmptrapd/snmptt functionality.

More details on NXTI’s capabilities, along with technical documentation links, can be found here:

Accessing Enterprise

The Enterprise Edition features directory can be found by simply clicking the Enterprise main menu in Nagios XI.

If you’re currently running the Standard Edition and would like to upgrade, simply email sales@nagios.com so our team can assist you. Once your license is upgraded, you’ll be able to add an additional key in the Admin > License Information menu to immediately activate the Enterprise features.

Prerequisites

Before you begin:

• A Clear Linux system updated with sudo swupd update
• Sudo or root access on the Clear Linux system
• Nagios XI installed and reachable
• Network connectivity between Clear Linux and Nagios XI (UDP port 161 open)

Step 1: Install SNMP Tools on Clear Linux

Clear Linux doesn’t include SNMP utilities by default. Install them:

sudo swupd bundle-add net-tools
sudo swupd bundle-add sysadmin-basic

sudo swupd bundle-add net-tools
sudo swupd bundle-add sysadmin-basic

Then install SNMP manually:

sudo swupd bundle-add package-utils
curl -O https://download-ib01.fedoraproject.org/pub/epel/7/x86_64/Packages/n/net-snmp-5.7.2-49.el7.x86_64.rpm
rpm2cpio net-snmp-5.7.2-49.el7.x86_64.rpm | cpio -idmv
sudo cp -r ./usr/* /usr/

sudo swupd bundle-add package-utils
curl -O https://download-ib01.fedoraproject.org/pub/epel/7/x86_64/Packages/n/net-snmp-5.7.2-49.el7.x86_64.rpm
rpm2cpio net-snmp-5.7.2-49.el7.x86_64.rpm | cpio -idmv
sudo cp -r ./usr/* /usr/

Note: Use the latest compatible SNMP RPM or build from source if preferred.

Step 2: Configure SNMP

SNMP v2c Configuration

1. Create a new config file:

sudo mkdir -p /etc/snmp
echo 'rocommunity Str0ngC0mmunity 10.25.5.12' | sudo tee /etc/snmp/snmpd.conf

sudo mkdir -p /etc/snmp
echo 'rocommunity Str0ngC0mmunity 10.25.5.12' | sudo tee /etc/snmp/snmpd.conf

2. Start SNMP (foreground):

sudo /usr/sbin/snmpd -f -Lo

sudo /usr/sbin/snmpd -f -Lo

To run it as a background process, remove -f.

SNMP v3 Configuration (Optional)

SNMP v3 requires a more complex setup. Use net-snmp utilities to create a user:

sudo net-snmp-create-v3-user -ro -a SHA -A Str0ng@uth3ntic@ti0n -x AES -X Str0ngPriv@cy nagios

sudo net-snmp-create-v3-user -ro -a SHA -A Str0ng@uth3ntic@ti0n -x AES -X Str0ngPriv@cy nagios

This may require additional scripting or compiling from source.

Step 3: Open the SNMP Port (UDP 161)

Clear Linux typically uses iptables. Allow SNMP traffic:

sudo iptables -I INPUT -p udp --dport 161 -j ACCEPT
sudo iptables-save > /etc/iptables/rules.v4

sudo iptables -I INPUT -p udp --dport 161 -j ACCEPT
sudo iptables-save > /etc/iptables/rules.v4

Verify:

sudo iptables -L -n | grep 161

sudo iptables -L -n | grep 161

Step 4: Test SNMP Communication

From your Nagios XI server:

SNMP v2c:

snmpwalk -v2c -c Str0ngC0mmunity <clearlinux-ip>

snmpwalk -v2c -c Str0ngC0mmunity <clearlinux-ip>

SNMP v3:

snmpwalk -v3 -u nagios -l authPriv -a SHA -A Str0ng@uth3ntic@ti0n -x AES -X Str0ngPriv@cy <clearlinux-ip>

snmpwalk -v3 -u nagios -l authPriv -a SHA -A Str0ng@uth3ntic@ti0n -x AES -X Str0ngPriv@cy <clearlinux-ip>

Expected Output:

iso.3.6.1.2.1.1.1.0 = STRING: "Linux clearlinux ..."

iso.3.6.1.2.1.1.1.0 = STRING: "Linux clearlinux ..."

Step 5: Add Host in Nagios XI Using SNMP Wizard

1. Log into Nagios XI
2. Navigate to Configure > Run a configuring wizard
3. Select Linux SNMP
4. Enter the Clear Linux IP and SNMP credentials
5. Choose metrics (CPU, memory, disk, etc.)
6. Apply and save configuration

Troubleshooting Tips

• SNMP Daemon Not Running: ps aux | grep snmpd
• Firewall Blocking Traffic: Ensure port 161 is open and rules are persistent
• Permission Issues: Verify snmpd.conf is readable and SNMP is correctly installed

Conclusion

Clear Linux can be monitored via SNMP with a few workarounds despite its stateless design. Once configured, Nagios XI provides deep insight into your system using lightweight, agentless checks.

Resources:

• Nagios SNMP Guide
• Net-SNMP Docs
• Nagios Knowledgebase

Prerequisites

Ensure:

• A NixOS system (updated with sudo nix-channel --update && sudo nixos-rebuild switch) with sudo or root access.
• A running Nagios XI instance (latest version recommended).
• Network connectivity between NixOS and Nagios XI (UDP port 161 open).
• Access to edit /etc/nixos/configuration.nix.

Step 1: Install SNMP Packages

Option 1: Imperative Installation (For Testing)

nix-env -iA nixos.net-snmp

nix-env -iA nixos.net-snmp

Verify:

snmpd --version

snmpd --version

Option 2: Declarative Installation (Recommended)

Add to /etc/nixos/configuration.nix:

environment.systemPackages = with pkgs; [ net-snmp ];

environment.systemPackages = with pkgs; [ net-snmp ];

Apply changes:

sudo nixos-rebuild switch

sudo nixos-rebuild switch

Verify:

/run/current-system/sw/bin/snmpd --version

/run/current-system/sw/bin/snmpd --version

Step 2: Configure SNMP Access

Option 1: SNMP v2c

sudo mkdir -p /etc/snmp
sudo cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.bak 2>/dev/null || true
echo "rocommunity Str0ngC0mmunity <Nagios-XI-IP>" | sudo tee /etc/snmp/snmpd.conf

sudo mkdir -p /etc/snmp
sudo cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.bak 2>/dev/null || true
echo "rocommunity Str0ngC0mmunity <Nagios-XI-IP>" | sudo tee /etc/snmp/snmpd.conf

Replace <Nagios-XI-IP> with your Nagios XI server IP (e.g., 10.25.5.12).

Option 2: SNMP v3 (Secure)

sudo systemctl stop snmpd.service
sudo net-snmp-create-v3-user -ro -a SHA -A Str0ng@uth3ntic@ti0n -x AES -X Str0ngPriv@cy nagios
sudo mkdir -p /etc/snmp
echo "rouser nagios authPriv" | sudo tee /etc/snmp/snmpd.conf

sudo systemctl stop snmpd.service
sudo net-snmp-create-v3-user -ro -a SHA -A Str0ng@uth3ntic@ti0n -x AES -X Str0ngPriv@cy nagios
sudo mkdir -p /etc/snmp
echo "rouser nagios authPriv" | sudo tee /etc/snmp/snmpd.conf

Step 3: Configure Firewall

Declarative Method (Recommended)

Add to /etc/nixos/configuration.nix:

networking.firewall.allowedUDPPorts = [ 161 ];

networking.firewall.allowedUDPPorts = [ 161 ];

Apply changes:

sudo nixos-rebuild switch

sudo nixos-rebuild switch

Verify:

sudo iptables -L -n | grep 161

sudo iptables -L -n | grep 161

Imperative Method (Temporary)

sudo iptables -I INPUT -p udp --dport 161 -j ACCEPT
sudo mkdir -p /etc/iptables
sudo iptables-save > /etc/iptables/rules.v4

sudo iptables -I INPUT -p udp --dport 161 -j ACCEPT
sudo mkdir -p /etc/iptables
sudo iptables-save > /etc/iptables/rules.v4

Step 4: Enable SNMP Daemon on Boot

Add to /etc/nixos/configuration.nix:

systemd.services.snmpd = {
  description = "SNMP Daemon";
  after = [ "network.target" ];
  wantedBy = [ "multi-user.target" ];
  serviceConfig = {
    ExecStart = "${pkgs.net-snmp}/bin/snmpd -c /etc/snmp/snmpd.conf";
    Restart = "on-failure";
  };
};

systemd.services.snmpd = {
  description = "SNMP Daemon";
  after = [ "network.target" ];
  wantedBy = [ "multi-user.target" ];
  serviceConfig = {
    ExecStart = "${pkgs.net-snmp}/bin/snmpd -c /etc/snmp/snmpd.conf";
    Restart = "on-failure";
  };
};

Apply changes:

sudo nixos-rebuild switch

sudo nixos-rebuild switch

Verify:

sudo systemctl status snmpd.service

sudo systemctl status snmpd.service

Step 5: Test SNMP Communication

Install SNMP tools on Nagios XI (if needed):

sudo dnf install net-snmp-utils -y

sudo dnf install net-snmp-utils -y

SNMP v2c

snmpwalk -v2c -c Str0ngC0mmunity <NixOS-IP>

snmpwalk -v2c -c Str0ngC0mmunity <NixOS-IP>

SNMP v3

snmpwalk -v3 -u nagios -l authPriv -a SHA -A Str0ng@uth3ntic@ti0n -x AES -X Str0ngPriv@cy <NixOS-IP>

snmpwalk -v3 -u nagios -l authPriv -a SHA -A Str0ng@uth3ntic@ti0n -x AES -X Str0ngPriv@cy <NixOS-IP>

Expected output:

iso.3.6.1.2.1.1.1.0 = STRING: "Linux nixos-<hostname> <version> x86_64"

iso.3.6.1.2.1.1.1.0 = STRING: "Linux nixos-<hostname> <version> x86_64"

Step 6: Add Host to Nagios XI Using SNMP Wizard

1. Log into Nagios XI
2. Navigate to Configure > Configuration Wizards
3. Select Linux SNMP
4. Configure Host:
   • IP: 192.168.0.31
   • SNMP Version: v2c or v3
   • v2c Community: Str0ngC0mmunity
   • v3 Username: nagios, Auth Protocol: SHA, Auth Password: Str0ng@uth3ntic@ti0n, Privacy Protocol: AES, Privacy Password: Str0ngPriv@cy
5. Click Next, select metrics (CPU, memory, disk, etc.)
6. Click Finish and apply
7. Verify monitoring in Monitoring > Hosts

Troubleshooting

SNMP Not Responding

sudo systemctl status snmpd
ps aux | grep snmpd
sudo systemctl restart snmpd

sudo systemctl status snmpd
ps aux | grep snmpd
sudo systemctl restart snmpd

Firewall Issue

sudo iptables -L -n
sudo nc -zu <NixOS-IP> 161

sudo iptables -L -n
sudo nc -zu <NixOS-IP> 161

Log SNMP Output

sudo /run/current-system/sw/bin/snmpd -f -Lo -c /etc/snmp/snmpd.conf

sudo /run/current-system/sw/bin/snmpd -f -Lo -c /etc/snmp/snmpd.conf

Conclusion

You’ve configured SNMP on NixOS and integrated it with Nagios XI for agentless, real-time monitoring as of March 28, 2025. NixOS’s declarative nature requires explicit setup for SNMP, but this approach ensures reliability. For long-term stability, maintain all configurations (packages, firewall, services) in /etc/nixos/configuration.nix. Explore further customization in the Nagios SNMP Guide, Net-SNMP Documentation, or NixOS Manual.

Prerequisites

The requirements to do 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: Install SNMP Packages

First, ensure that the necessary SNMP packages are installed on your Kali Linux system. Open a terminal and run the following commands.

sudo apt update
sudo apt install snmp snmpd snmp-mibs-downloader

sudo apt update
sudo apt install snmp snmpd snmp-mibs-downloader

Step 2: Configure the SNMP File

The main configuration file for the SNMP daemon is /etc/snmp/snmpd.conf. Edit this file to define the SNMP community string, system information, and access control. Remember to back up the original file first.

sudo cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.bak
sudo nano /etc/snmp/snmpd.conf

sudo cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.bak
sudo nano /etc/snmp/snmpd.conf

Find the line that have community lines and add or modify the community string for your Nagios XI server. Replace your_read_only_community_string with a strong, secure community string, and update nagios_xi_server_ip to the IP address of your Nagios XI server.

rocommunity your_read_only_community_string nagios_xi_server_ip

rocommunity your_read_only_community_string nagios_xi_server_ip

Save and close the file.

Step 3: Restart the SNMP Daemon

After making changes to the configuration file, restart the SNMP daemon to apply the changes and check the status of the service.

sudo systemctl restart snmpd
sudo systemctl status snmpd

sudo systemctl restart snmpd
sudo systemctl status snmpd

Step 4: Configure Nagios XI

Add the Kali Linux host to Nagios XI by logging in to your Nagios XI web interface.

Click the gear icon on the Configure tab, then navigate to the Configuration Wizards and select the Linux Server from the wizard list.

Follow the wizard instructions by entering the IP address of your Kali Linux machine and specifying your SNMP community string you added earlier.

Configure the rest of the wizard SNMP checks. You have the choice to add more specific SNMP checks using the SNMP Walk or SNMP Query services within Nagios XI or by manually defining service checks.

Step 5: Verify your SNMP Checks

After adding the host and configuring the checks, ensure that Nagios XI is successfully receiving SNMP data from your Kali Linux machine from your status page.

Important Security Considerations

• Use strong community strings: Never use default community strings like public or private.
• Restrict SNMP access: Limit SNMP access to only the necessary IP addresses or networks.
• Firewall rules: Ensure that your firewall allows SNMP traffic (UDP port 161) from your Nagios XI server to the Kali Linux machine.

Conclusion

By following this guide, you can successfully configure SNMP on Kali Linux for monitoring with Nagios XI. This setup will help you track your system’s performance and promptly address any issues, ensuring optimal reliability. If you have additional questions or other support-related questions, please visit us at our Nagios Support Forum, Nagios Knowledge Base, or Nagios Library.