Comment 4 for bug 888643

Hmm - or even not.

Installing on an IPv4 only KVM instance:

ubuntu@ubuntu:~$ netstat -lt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 *:ssh *:* LISTEN
tcp6 0 0 [::]:2181 [::]:* LISTEN
tcp6 0 0 [::]:37069 [::]:* LISTEN
tcp6 0 0 [::]:ssh [::]:* LISTEN
ubuntu@ubuntu:~$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 52:54:00:f3:77:6c brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.163/24 brd 192.168.122.255 scope global eth0
    inet6 fe80::5054:ff:fef3:776c/64 scope link
       valid_lft forever preferred_lft forever

However I am able to connect remotely to 192.168.122.163:2181.