Since some days there is IPv6 available for my server. But I noticed it just today. Editing /etc/network/interfaces and adding a new virtual interface didn’t work at all. The /etc/init.d/networking restart just showed errors. And ifconfig venet0 wasn’t satisfying.

What works is /etc/network/interfaces just adding the loopbback

iface lo inet6 loopback
        adress ::1
        netmask 128
        gateway fe80::1

Now the trick is to add /etc/rc.local and add this before exit 0

ip addr add 2a01:238:40ab:cd12:dead:beef:dead:beef/128 dev venet0
ip route add default via fe80::1 dev venet0

Than execute /etc/rc.local
Wonder o wonder. Ifconfig works and also ping6

Than I had to add the new ipv6 adress to my apache config

Listen [2a01:238:40ab:cd12:dead:beef:dead:beef]:80

Don’t forget a to create a symlink from rc.local to /etc/rc2.d/S21rc2.local