IPv6 may work out of the box in many cases. But in some cases or some specific provider, you may need to tweak things manually to enable IPv6.
OVH gives one IPv4 address and one IPv6 address for VPS but by default, only IPv4 is OK. The OVH's documentation is here : https://docs.ovh.com/gb/en/vps/configuring-ipv6/
Here : https://yunohost.org/#/dns_subdomains
On the OVH panel, you will copy 3 elements:
/128because you have only one IPv6 address.
On your VPS, create a backup of the network configuration with :
cp /etc/network/interfaces ~/interfaces in home directory.
Then, you can edit the configuration file (
/etc/network/interfaces) with the following.
In this example, it is assumed that your network interface is
eth0. If it's different (check with
ip a) you need to adapt the example below.
iface eth0 inet6 static address <your IPv6 address> netmask <your IPv6 prefix> post-up /sbin/ip -6 route add <the IPv6 gateway> dev eth0 post-up /sbin/ip -6 route add default via <the IPv6 gateway> dev eth0 pre-down /sbin/ip -6 route del default via <the IPv6 gateway> dev eth0 pre-down /sbin/ip -6 route del <the IPv6 gateway> dev eth0
Now, save the file and restart the network service with :
service networking restart. (TODO : ideally we should find a way to validate the content of the configuration, otherwise it could fuck up the network stack and get disconnected from the VPS ?)
Check your configuration with these commands :
ip ato display network interfaces and addresses
hostname -Ito display the system IP addresses
If it's ok, it's ok !
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