How to Configure a Static IP Address on Ubuntu [20 Easy Steps]

Written by

Ojash

Reviewed by

Akshat

Last updated: July 26, 2023

Expert verified

Configuring a static IP address on your Ubuntu machine is the way to go! A static IP address eliminates the risk of IP conflicts, which can disrupt network communication. It ensures that your device is always accessible at the same address, reducing downtime. In this comprehensive guide, I’ll walk you through the step-by-step process to configure static IP address on Ubuntu system. I will also explore some best practices and common errors that can occur when configuring the static IP address.

How to Configure a Static IP Address on Ubuntu

To configure a static IP address on Ubuntu, you need administrative privileges and access to a functional network interface. Ensure there are available IP addresses within the network’s range to avoid conflicts. Modifying network configuration files or using the Network Manager GUI allows you to assign a stable IP address, enhancing network stability, secure hosting, and performance.

1. Open a Terminal.

2. Run the following command to view your current IP address:

<strong>ifconfig</strong>

3. This will show you the IP address, subnet mask, and gateway address of your current network interface.

4. Use the following command to list all network interfaces on your Ubuntu system:

<strong>ip link show</strong>

5. This will show you a list of all the network interfaces on your system, including their names and status.

6. Check the status of each interface with by running the following command to ensure they are up and running.

<strong>ip a show [interface]</strong>

Replace interface with the interface name of which you want to check the status of.

7. Know your network’s subnet mask and gateway address for proper IP assignment. Select an IP address that falls within your network’s address range but outside the DHCP pool. Avoid using IP addresses that are already assigned to other devices.
8. Run the following command to check for any conflicting responses.

<strong>ping [static IP address]</strong>

9. If you receive responses, the IP address is already in use, and you should choose another.

10. Run this command to list netplan configuration file:

<strong>ls /etc/netplan/</strong>

11. The command will list the netplan configuration file.

12. Now run the following command:

<strong>sudo cp /etc/netplan/01-network-manager-all.yaml /etc/netplan/01-network-manager-all.yaml.bak</strong>

13. The command will create a backup of netplan configura .

creating-backup-of-netplan-configuration-file

14. Now execute the command:

<strong>sudo nano /etc/netplan/01-netcfg.yaml</strong>

15. The command will open the netplan configuration file.

16. Add the following lines below it, adjusting the values accordingly:

<strong>network:</strong>
<strong> version: 2</strong>
<strong>  renderer: NetworkManager</strong>
<strong>  ethernets:</strong>
<strong>   enp0s3:  # Change this to your interface name if different</strong>
<strong>     dhcp4: no</strong>
<strong>      addresses: [10.0.2.100/24]  # Replace with your desired static IP and subnet mask (e.g., "192.168.1.100/24")</strong>
<strong>      gateway4: 10.0.2.1  # Replace with your gateway address</strong>
<strong>      nameservers:</strong>
<strong>        addresses: [8.8.8.8, 8.8.4.4]  # Replace with your DNS server ad</strong>

17. Applying Changes and Restarting the Network Service. Save the changes and exit the text editor (press Ctrl + X, then Y, and Enter).

applying-changes-to-netplan-configuration-file

18. Restart the networking service using the command:

<strong>sudo systemctl restart NetworkManager</strong>

19. The command will restart the networking services.

20. Run ifconfig in the Terminal to verify that the new static IP address is assigned to your network interface.

3 Best Practices for Static IP Configuration

Configuring a static IP address on your network can provide numerous benefits, such as enhanced stability, secure hosting, and improved network performance. To ensure a smooth and efficient setup, it’s crucial to follow best practices that guarantee a reliable and hassle-free static IP configuration. Here are four best practices to follow:

• 🔒 Regularly Review and Update IP Settings: As networks evolve and devices change, it’s essential to periodically review and update your static IP settings. Over time, the initial IP allocations might become inadequate or conflicting, leading to potential connectivity issues. By regularly auditing your IP address assignments, you can ensure smooth communication and prevent any unnecessary disruptions.
• 📝 Keep a Log of Network Changes: Maintaining a detailed log of all network changes, including static IP configurations, can be invaluable in troubleshooting and resolving issues. Should any problems arise in the future, the log will serve as a comprehensive reference, allowing you to revert to previously working settings or identify the source of the problem more efficiently.
• 🔥 Implement Additional Security Measures: While static IPs offer stability, they can also be more susceptible to targeted attacks. To enhance network security, consider implementing additional measures such as firewalls, intrusion detection systems, and access control lists. These extra layers of protection will fortify your network, safeguard sensitive data, and minimize the risk of unauthorized access.
• 🔄 Plan for Network Scalability: As your network grows, it’s vital to plan for scalability in your static IP configuration. Ensure that the selected IP address ranges are ample enough to accommodate future expansion without causing conflicts. Proactively consider the potential addition of new devices, services, or users to avoid potential headaches down the road.

3 Common Errors in Static IP Configuration

Configuring a static IP address on your Ubuntu system can greatly improve network stability and security. However, mistakes during the setup process can lead to connectivity issues and disruptions. Here, I’ll highlight some of the most common errors encountered during static IP configuration and how to avoid them.

• 🚫 IP Address Conflict: One of the most prevalent errors is assigning a static IP address that conflicts with an existing device on the network. This can cause communication problems and lead to intermittent connectivity. Always ensure you choose an IP address outside the DHCP pool and verify that it’s not already in use by another device.
• ⚙️ Incorrect Network Settings: Incorrectly configuring network settings, such as the subnet mask or gateway address, can result in isolation from the network or the internet. It’s crucial to double-check and accurately enter the necessary details when setting up a static IP address. Verify the subnet mask and gateway information with your network administrator or router settings.
• 🔌 Interface Down or Inactive: Another common error is forgetting to activate the network interface after making changes. If the interface remains down or inactive, your static IP configuration won’t take effect. Always restart the networking service or enable the interface using the appropriate commands to ensure your changes are applied correctly.
• 📄 Typos in Configuration Files: Typos or syntax errors in configuration files, such as /etc/network/interfaces, can lead to unexpected behavior and prevent the static IP address from being applied. Carefully review the files for any errors and use a text editor that highlights syntax to avoid mistakes. Additionally, creating a backup of the original files before modification can be beneficial in case of any mishaps.

In Conclusion

I’ve provided you with a step-by-step guide to configure a static IP address on Ubuntu system, ensuring enhanced stability, security, and network performance. Alongside this guide, I’ve highlighted common errors that may occur during the process, helping you avoid potential connectivity issues. Additionally, I’ve shared essential best practices to ensure a smooth and reliable static IP configuration.

Now, if you’re eager to expand your Ubuntu networking knowledge, consider exploring these topics: Advanced Firewall Configuration for Ubuntu, Load Balancing Strategies for High-Traffic Website, and Implementing Virtual Private Networks for Secure Remote Access. Remember, the more you explore Ubuntu’s networking possibilities, the more proficient you’ll become in managing your network with confidence. So keep exploring, stay curious, and continue expanding your expertise in Ubuntu networking.

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