IP address changing

[tryingtobeIT]

Hi there,

What is the best way to change my Nagios XI to a static IP so that I continue to receive the same IP address each time I load?

[sawdusty]

What OS is your NagiosXI running on? For Ubuntu, look at netplan to set your static IP. For Windows, look at Settings>Network & Internet so change from DHCP to manual. Whatever OS you're running, make sure you don't assign an address already in use.

[lgute]

Hi @tryingtobeIT,

Thanks for reaching out. Depending on which operating system XI is installed on, there will be a few steps to do to set a static IP. So the first question is which distribution and version are you using?

[tryingtobeIT]

Hi,

Windows 10 and Ubuntu 24.04.

Thanks!

[cnorell]

tryingtobeIT,

First, a disclaimer: this is outside of the bounds of what Nagios can officially support, as it will touch several pieces of your infrastructure not directly related to your Nagios XI instance. Specifically, this change needs to happen on the operating system level first to set the machine's IP address, then you can update your IP in the XI interface.

On Ubuntu 24, you will be interacting with Netplan configuration files. I believe these live in /etc/netplan/. Find the existing YAML config file, or create one if none exist. A good name could be 01-netcfg.yaml if you need to create one.

An example configuration could look something like:

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network:
  version: 2
  renderer: networkd
  ethernets:
    <interface_name>:
      dhcp4: no
      addresses:
        - <desired_ip_address>/<subnet_mask>
      routes:
        - to: default
          via: <default_gateway_ip>
      nameservers:
        addresses: [<dns_1_ip>, <dns_2_ip>]

To find the interface name, run ip link.

If you created a new config file, ensure you set reasonable permissions:

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sudo chmod 600 /etc/netplan/<your_config>.yaml

Apply the config:

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sudo netplan apply

Check your work:

Code: Select all

ip a

Once the machine's IP address is worked out, set the same IP address in XI as the Program URL. Navigate to: Admin > System Config > System Settings > Program URL, enter the static IP you set earlier and click Update Settings.

Hope this helps!