How to Set a Static IPv6 Address on Ubuntu 22.04 LTS Using Netplan

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Setting a static IPv6 address on Ubuntu 22.04 LTS helps your server stay reachable. Netplan is the tool you will use. Follow these easy steps.

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Why Use a Static IPv6 Address?

A static IPv6 address does not change.
It helps your server always have the same address.
This is important for web servers, email servers, and remote access.

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What You Need

• Ubuntu 22.04 LTS installed
• IPv6 working on your network
• Your IPv6 address, prefix (like /64), gateway, and DNS servers
• Root or sudo access

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Step 1: Find Your Network Interface

Open a terminal.
Type:

ip a

Look for your network name, like ens33, eth0, or enp0s3.

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Step 2: Backup Your Netplan File

Before making changes, make a backup.
Type:

sudo cp /etc/netplan/00-installer-config.yaml /etc/netplan/00-installer-config.yaml.bak

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Step 3: Edit the Netplan File

Open the file to edit:

sudo nano /etc/netplan/00-installer-config.yaml

Add or update your IPv6 settings.
Change the example values to match your info.

network:
  version: 2
  ethernets:
    ens33:
      dhcp6: no
      addresses:
        - 2001:db8::1001/64
      gateway6: 2001:db8::1
      nameservers:
        addresses:
          - 2001:4860:4860::8888
          - 2001:4860:4860::8844

Tip: Make sure the spaces match the example. YAML needs correct indentation.

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Step 4: Test and Apply

Test your new setup:

sudo netplan try

If it works, apply the change:

sudo netplan apply

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Step 5: Check Your Address and Connection

Check your address:

ip -6 addr show

Test the connection:

ping6 google.com

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Tips for Success

• Always backup before making changes.
• Write down your settings.
• Have console access in case you get locked out.

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Now your server uses a static IPv6 address on Ubuntu 22.04 LTS with Netplan.
Your server will have a reliable address for all your needs.