{"id":20697,"date":"2020-11-30T05:12:22","date_gmt":"2020-11-29T21:12:22","guid":{"rendered":"https:\/\/web.mwwsb.com.my\/pjci\/?post_type=kb&p=20697"},"modified":"2023-01-18T09:54:11","modified_gmt":"2023-01-18T01:54:11","slug":"how-to-configure-static-ip-address-on-ubuntu-18-04","status":"publish","type":"kb","link":"https:\/\/www.casbay.com\/guide\/kb\/how-to-configure-static-ip-address-on-ubuntu-18-04","title":{"rendered":"How to Configure Static IP Address on Ubuntu 18.04"},"content":{"rendered":"\t\t
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In this tutorial, we\u2019ll explain how to set up a static IP address on Ubuntu 18.04.<\/p>

Do you know that:<\/p>

Your router DHCP server would assign the IP addresses dynamically? In different situations such as configuring port forwarding or running a media server on your network, it may be necessary to set a static IP address on your Ubuntu computer.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Configuring Static IP address using DHCP<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The easiest way to assign a static IP address to a device on your LAN is by setting up a Static DHCP on your router. Static DHCP or DHCP reservation is a feature that we find on most routers which makes the DHCP server automatically assign the same IP address to a specific network device, every time the device requests an address from the DHCP server. This works by assigning a static IP to the device’s unique MAC address. However, the steps for configuring a DHCP reservation vary from router to router and it\u2019s advisable to consult the vendor\u2019s documentation.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Netplan<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Starting with the 17.10 release, Netplan is the default network management tool on Ubuntu, replacing the configuration file \/etc\/network\/interfaces that had previously been used to configure the network on Ubuntu.<\/p>

Netplan uses configuration files with YAML syntax. To configure a network interface with Netplan you simply create a YAML description for that interface and Netplan generates the required configuration files for the renderer tool that you choose.<\/p>

Moreover, Netplan currently supports two renderers NetworkManager and Systemd-networkd. We use NetworkManager mostly on desktop machines. For System-network, we use it when a GUI is absent on servers.<\/p><\/div>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Configuring Static IP address on Ubuntu Server<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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To configure a static IP address, you will need a VPS<\/a> <\/strong>or Dedicated Server<\/a><\/strong> that runs on Ubuntu. The newer versions of Ubuntu uses \u2018Predictable Network Interface Names\u2019 that start with en[letter][number]<\/code>. by default. The first step is to identify the name of the ethernet interface you want to configure. You can use the following IP link command:<\/span><\/p>

ip link\n<\/span><\/code><\/pre>
The command will print a list of all the available network interfaces. In this case, the name of the interface is\u00a0ens3<\/code>:<\/p>
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000\n    link\/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00\n3: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000\n    link\/ether 56:00:00:60:20:0a brd ff:ff:ff:ff:ff:ff\n<\/code><\/pre>
The location of the Netplan configuration files is in the \/etc\/netplan<\/code>\u00a0directory and have the extension\u00a0.yaml<\/code>. You\u2019ll probably find one or two YAML files in this directory. The file may differ from setup to setup. Usually, the file is named either\u00a001-netcfg.yaml<\/code>,\u00a050-cloud-init.yaml<\/code>\u00a0or\u00a0NN_interfaceName.yaml<\/code>, but in your system, it may be different.<\/p>
Next, open the YAML configuration file with your text editor:<\/p>
sudo nano \/etc\/netplan\/01-netcfg.yaml\n<\/span><\/code><\/pre>
\/etc\/netplan\/01-netcfg.yaml<\/div>
network:<\/span>\n  version:<\/span> 2<\/span>\n  renderer:<\/span> networkd\n  ethernets:<\/span>\n    ens3:<\/span>\n      dhcp4:<\/span> yes\n<\/code><\/pre><\/div>
Copy<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Before\u00a0changing\u00a0the\u00a0configuration<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Let\u2019s explain the code in a short time before changing the configuration.<\/p>
Each Netplan Yaml file starts with the network<\/code>\u00a0key that has at least two required elements. The first required element is the version of network configuration format and the second one is the device type. Device types values can be\u00a0ethernets<\/code>,\u00a0bonds<\/code>,\u00a0bridges<\/code>, and\u00a0vlans<\/code>.<\/p>
Furthermore, the configuration above also includes the renderer<\/code>\u00a0type. Out of the box, if you installed Ubuntu in server mode the renderer is configured to use\u00a0networkd<\/code>\u00a0as the back end.<\/span><\/p>
Under the device\u2019s type ( in this case\u00a0ethernets<\/code>) we can specify one or more network interfaces. In this example, we have only one interface ens3<\/code>\u00a0that is configured to obtain IP addressing from a DHCP server\u00a0dhcp4: yes<\/code>.<\/p>
To assign a static IP address to\u00a0ens3<\/code> the interface edit the file as follows:<\/p>