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Configuring IPv6 on OVH AlmaLinux 8: A step-by-step guide

   October 8, 2023
Linux admin @ Freshers.in

Configuring IPv6 on an OVH AlmaLinux 8 server is an essential task for ensuring your server can communicate over the IPv6 network. In this detailed guide, we will walk you through the process step by step, including finding the network interface, obtaining IPv6 information, editing configuration files, and creating a route file.

Prerequisites:

Before you start, make sure you have the following:

  1. OVH VPS with AlmaLinux 8: You should have an OVH Virtual Private Server (VPS) running AlmaLinux 8.
  2. Access to the Server: You should have SSH access to your OVH server with administrative privileges.

Step 1: Identify the Network Interface

First, you need to find the network interface used by your server. Connect to your server using SSH and run the following command:

ip a

Look for your network interface(s) in the output, typically named eth0, eth1, or similar. Note down the interface name.

Step 2: Find the IPv6 IP Address and Gateway

You can obtain the IPv6 IP address and gateway information from the OVH Manager, which provides this information for your specific server.

  1. Log in to your OVH Manager account.
  2. Navigate to your server’s dashboard.
  3. Under the “IP” section, look for the IPv6 address associated with your server. Note down this IPv6 address.
  4. Also, note the gateway address, which is typically provided by OVH.

Step 3: Edit the Network Configuration File

Now, you’ll edit the configuration file for your network interface to add the IPv6 configuration. Replace <interface> with the actual name of your network interface (e.g., eth0).

nano /etc/sysconfig/network-scripts/ifcfg-<interface>

Add the following lines to the file:

IPV6INIT=yes
IPV6ADDR=<your IPv6 address>/64
IPV6_DEFAULTGW=<your IPv6 gateway>
<your IPv6 address> should be replaced with the IPv6 address you obtained from OVH Manager.
<your IPv6 gateway> should be replaced with the IPv6 gateway address provided by OVH.
Save the file and exit the text editor.

Step 4: Create a Route File

Next, you’ll create a route file to ensure that the IPv6 traffic is routed correctly. Replace <interface> with the actual name of your network interface.

nano /etc/sysconfig/network-scripts/route6-<interface>

Add the following line to the file:

default via <your IPv6 gateway> dev <interface>

Replace <your IPv6 gateway> with the IPv6 gateway address provided by OVH, and <interface> with your network interface name.

Save the file and exit the text editor.

Step 5: Restart Networking

To apply the changes and activate IPv6 on your server, restart the networking service:

systemctl restart network

Step 6: Verify IPv6 Configuration

You can verify that IPv6 is properly configured on your OVH AlmaLinux 8 server by running the following command:

ip -6 addr show <interface>

Replace <interface> with your actual network interface name. You should see the IPv6 address and gateway you configured.

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