Depends on your usage, IPv6 might be an important feature to have on your server. Enabling IPv6 could be tricky if since the wiki is outdated. For Frantech/BuyVM, we will need to be using Stallion to enable it.
If your are using Ubuntu 17.10 and later, netplan is now your network configuration tools by default.
Netplan is a neat solution which requires you to do some simple steps to get your IPv6 working.
Step 1 – Assign IPv6 to your server
Go to Networking > IPv6, then click on Assign IPv6 Address.
Only fill the last input box with any compatible IPv6 character(s). For the sake of this tutorial, let’s fill it with number 1.
Click the blue button to save. You can repeat this multiple times to add multiple IPv6. I added 3 of them with incremental number.
Now, turn the switches on, and Save Changes
Step 2 – Modify netplan configurations
On your server, edit file
By default, you are going to see something like this:
network: version: 2 ethernets: eth0: dhcp4: true
Edit it to be like this
network: version: 2 ethernets: eth0: dhcp4: true # Configuration for IPv6 dhcp6: no addresses: - 2605:6400:30:xxxx::1/48 - 2605:6400:30:xxxx::2/48 - 2605:6400:30:xxxx::3/48 gateway6: 2605:6400:30::1
- dhcp6 – The value should be no. This will tell netplan that we want to manually configuring IPv6 instead of relying on DHCP (which wouldn’t work).
- addresses – This is where you specify your IP addresses that you added earlier in Stallion. Edit the example to your own IP addresses. /48 prefix is required on every single IP.
- gateway6 – Depends on your location, it will be different between them. In this example, I have my server in Luxembourg. If your server is in different location, check your gateway by clicking gear icon next to any newly added IPv6, then select Network Settings.
Your netplan configuration should look like this.
After saving the edit, apply your new netplan configuration
$ sudo netplan apply
You will be disconnected for a few moments.
If your are not, don’t panic! You can still connect to your server using Console feature in Stallion.
Just click on Web Based Console and log into your server using same credentials. You can then revert the changes or troubleshoot of any mistakes. make sure to apply your netplan configurations after every final changes.
Step 3 – Verify it is working
To make sure everything is working, ping an IPv6 hostname or IP.
$ ip a should look like this
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 00:16:8c:f2:a2:a6 brd ff:ff:ff:ff:ff:ff inet 107.xxx.xxx.xxx/24 brd 220.127.116.11 scope global dynamic eth0 valid_lft 2586045sec preferred_lft 2586045sec inet6 2605:6400:30:xxxx::3/48 scope global valid_lft forever preferred_lft forever inet6 2605:6400:30:xxxx::2/48 scope global valid_lft forever preferred_lft forever inet6 2605:6400:30:xxxx::1/48 scope global valid_lft forever preferred_lft forever inet6 fe80::216:8cff:fef2:a2a6/64 scope link valid_lft forever preferred_lft forever