--- title: "Configuring an Additional IP (Public Cloud)" description: "Learn how to add Additional IP addresses to your network configuration." url: https://docs.us.ovhcloud.com/en/public-cloud/network-services/configuring-additional-ip-public-cloud lang: en --- > For AI agents: the complete documentation index is available at https://docs.us.ovhcloud.com/en/llms.txt, the full documentation bundle is available at https://docs.us.ovhcloud.com/en/llms-full.txt. # Configuring an Additional IP (Public Cloud) **Learn how to add Additional IP addresses to your network configuration.** You may need to configure Additional IP addresses on your instances, for example, if you are hosting multiple websites or international services. OVHcloud Additional IPs allow you to associate multiple IP addresses with a single network interface. **Note:** This article is about Additional IPv4 configuration on a public interface. You can also configure IPv6 addresses on your Public Cloud instance using [this guide](https://docs.us.ovhcloud.com/en/public-cloud/network-services/ipv6-configuration.md). Please note that Additional IP addresses can also be configured in a vRack (private network), which allows interconnection over a wide range of OVHcloud services, offering more flexibility. You can find more information about configuring Additional IP addresses in a vRack for usage with Public Cloud instances in the following guides: - [Configuring a public IP block in a vRack on a Public Cloud instance](https://docs.us.ovhcloud.com/en/public-cloud/network-services/configure-ip-block-vrack-instance.md) - [Configuring an IPv6 block in a vRack](https://docs.us.ovhcloud.com/en/bare-metal-cloud/dedicated-servers/configure-ipv6-in-vrack.md) **Warning:** **NOTE:** OVHcloud provides services for which you are responsible for their configuration and management. You are therefore responsible for their proper functioning.\ \ This tutorial is designed to help you as much as possible with common tasks. If you are having difficulty performing these actions, please contact a specialized service provider. OVHcloud cannot provide you with technical support in this regard.   ## Requirements - A [Public Cloud instance](https://us.ovhcloud.com/public-cloud/) in your OVHcloud account - An [Additional IP address](https://us.ovhcloud.com/network/additional-ip/) or an Additional IP block - Administrative access (root) via SSH or GUI to your instance - Basic networking and administration knowledge   ## Instructions The following sections contain the configurations for the most commonly used distributions/operating systems. The first step is always to log in to your instance via SSH or a GUI login session (VNC for a Windows instance). The examples below presume you are logged in as a user with elevated permissions (Administrator/sudo). **Note:** Concerning different distribution releases, please note that the proper procedure to configure your network interface, as well as the file names, may have been subject to change. We recommend consulting the manuals and knowledge resources of the respective OS versions if you experience any issues. **Please take note of the following terminology that will be used in code examples and instructions of the guide sections below:** | | | | | ------------------ | -------------------------------------------------------------------------------------------------------- | -------------- | | **Term** | **Description** | **Examples** | | ADDITIONAL\_IP | An Additional IP address assigned to your service | 169.254.10.254 | | NETWORK\_INTERFACE | The name of the network interface | _eth0, ens3_ | | ID | ID of the IP alias, starting with _0_ (depending on the number of additional IPs there are to configure) | _0_, _1_ | **Note:** When configuring an Additional IP on a Public Cloud instance, you do not need a gateway and subnet mask. ### Debian 11 ### Debian 11 #### Step 1: Disable automatic network configuration Open the following file path with a text editor: ``` sudo nano /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg ``` Enter the following line, then save and exit the editor. ``` network: {config: disabled} ``` Creating this configuration file will prevent changes to your network configuration from being made automatically.   #### Step 2: Edit the network configuration file You can verify your network interface name with this command: ``` ip a ``` Open the network configuration file for editing with the following command: ``` sudo nano /etc/network/interfaces.d/50-cloud-init ``` Then add the following lines: ``` auto NETWORK_INTERFACE:ID iface NETWORK_INTERFACE:ID inet static address ADDITIONAL_IP netmask 255.255.255.255 ```   #### Step 3: Restart the interface Apply the changes with the following command: ``` sudo systemctl restart networking ``` ##### Debian 12+, Ubuntu 22.04+ ### Ubuntu 22.04 & Debian 12 The configuration file for your Additional IP addresses is located in `/etc/netplan/`. In this example, it is called "50-cloud-init.yaml". Before making changes, verify the actual file name in this folder. Each Additional IP address will need its own line within the file. #### Step 1: Disable automatic network configuration Open the following file path with a text editor: ``` sudo nano /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg ``` Enter the following line, then save and exit the editor. ``` network: {config: disabled} ``` Creating this configuration file will prevent changes to your network configuration from being made automatically.   #### Step 2: Edit the configuration file You can verify your network interface name with this command: ``` ip a ``` Open the network configuration file for editing with the following command: ``` sudo nano /etc/netplan/50-cloud-init.yaml ``` Do not change the existing lines in the file; add your Additional IP address according to the example below: ``` network: version: 2 ethernets: NETWORK_INTERFACE: dhcp4: true match: macaddress: fa:xx:xx:xx:xx:63 set-name: NETWORK_INTERFACE addresses: - ADDITIONAL_IP/32 ``` **Warning:** **NOTE:** It is important to respect the alignment of each element in this file as represented in the example above. Do not use the tab key to create your spacing. Save and close the file.   #### Step 3: Apply the new network configuration You can test your configuration using this command: ``` sudo netplan try ``` If it is correct, apply it using the following command: ``` sudo netplan apply ``` Repeat this procedure for each Additional IP address. ##### cPanel (CentOS 7) / Red Hat derivatives ### cPanel (CentOS 7) / Red Hat derivatives #### Step 1: Edit the network configuration file You can verify your network interface name with this command: ``` ip a ``` Open the network configuration file for editing: ``` sudo nano /etc/sysconfig/network-scripts/ifcfg-NETWORK_INTERFACE:ID ``` Then add these lines: ``` DEVICE=NETWORK_INTERFACE:ID BOOTPROTO=static IPADDR=ADDITIONAL_IP NETMASK=255.255.255.255 BROADCAST=ADDITIONAL_IP ONBOOT=yes ```   #### Step 2: Restart the interface Apply the changes with the following command: ``` sudo systemctl restart networking ``` ##### Plesk ### Plesk #### Step 1: Access the Plesk IP management section In the Plesk control panel, choose `Tools & Settings` from the left-hand sidebar. Click on `IP Addresses` under **Tools & Resources**.   #### Step 2: Add the additional IP information In this section, click on the button `Add IP Address`. Enter your Additional IP in the form `xxx.xxx.xxx.xxx/32` into the **IP address and subnet mask** field, then click on `OK`.   #### Step 3: Check the current IP configuration Back in the **IP Addresses** section, verify that the Additional IP address was added correctly. ##### Windows Server ### Windows Server (2016) Log in to the [OVHcloud Control Panel](https://manager.us.ovhcloud.com/), go to the `Public Cloud` section, and select the Public Cloud project concerned. Open `Instances` in the left-hand menu and click on the name of your instance. Switch to the tab `VNC console`. #### Step 1: Verify the network configuration Right-click on the `Start Menu` button and open `Run`. Type `cmd` and click `OK` to open the command line application.   To retrieve the current IP configuration, enter `ipconfig` at the command prompt.   #### Step 2: Change the IPv4 Properties Now you need to change the IP properties to a static configuration. Open the adapter settings in the Windows control panel and then open the `Properties` of `Internet Protocol Version 4 (TCP/IPv4)`. In the IPv4 Properties window, select `Use the following IP address`. Enter the IP address which you have retrieved in the first step, then click on `Advanced`.   #### Step 3: Add the Additional IP in the "Advanced TCP/IP Settings" In the new window, click on `Add...` under **IP addresses**. Enter your Additional IP address and the subnet mask (255.255.255.255).   Confirm by clicking on `Add`.   #### Step 4: Restart the network interface Back in the control panel (under the **Network Connections** menu), right-click on your network interface and then select `Disable`.   To restart it, right-click on it again and then select `Enable`.   #### Step 5: Check the new network configuration Open the command prompt (cmd) and enter `ipconfig`. The configuration should now include the new Additional IP address.   ### Troubleshooting First, soft-reboot your instance via the instance's OS or from the [OVHcloud Control Panel](https://manager.us.ovhcloud.com/). If you are still unable to establish a connection from the public network to your Additional IP and suspect a network problem, you need to reboot the instance in rescue mode. Then you can set up the Additional IP address directly on the instance. Once you are connected in rescue mode via SSH, enter the following command: ``` ifconfig ens3:0 ADDITIONAL_IP netmask 255.255.255.255 broadcast ADDITIONAL_IP up ``` To test the connection, simply ping your Additional IP from the outside. If it responds in rescue mode, that probably means that there is a configuration error. If, however, the IP is still not working, please inform our support teams by creating a support request in your [OVHcloud Control Panel](https://manager.us.ovhcloud.com/) for further investigations.   ## Go further Browse all the [Networking guides](https://docs.us.ovhcloud.com/en/public-cloud/network-services/landing-page-network-services.md). Browse the rest of the [OVHcloud US documentation](https://docs.us.ovhcloud.com/en/index.md) for guides on our other products and services. Learn more about [Public Cloud Network](https://us.ovhcloud.com/public-cloud/network/) on the OVHcloud US website.