[Bug 1750392] Re: Cannot enable IPv6 privacy extensions

[Steve Langasek]

A possible SRU regression has been reported against netplan.io
0.96-0ubuntu0.18.10.2 in LP: #1825206.  This version has been rolled
back to -proposed while the investigation is ongoing.

** Changed in: netplan.io (Ubuntu Cosmic)
       Status: Fix Released => Fix Committed

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https://bugs.launchpad.net/bugs/1750392

Title:
  Cannot enable IPv6 privacy extensions

Status in netplan:
  Fix Released
Status in netplan.io package in Ubuntu:
  Fix Released
Status in netplan.io source package in Bionic:
  Fix Committed
Status in netplan.io source package in Cosmic:
  Fix Committed

Bug description:
  [Impact]
  Ubuntu users concerns with privacy of their IP addresses over IPv6.

  [Test case]
  1) Configure netplan with IPv6 privacy enabled:

  network:
    version: 2
    ethernets:
      eth0:
        dhcp6: true
        ipv6-privacy: true

  2) Run 'netplan apply'
  3) Run 'ip -6 addr'
  4) Verify that additional temporary addresses are added by the kernel.

  [Regression Potential]
  Minimal. This enables or disables the setting for IPv6 privacy addresses on an per-interface basis, and defaults remain unchanged.

  ---

  
  Summary:

  netplan contains no configuration entry that allows one to enable IPv6
  Privacy Extensions (RFC 4941) when autogenerated (DHCPv6 stateless,
  SLAAC) addressing is used.

  This should map to the IPv6PrivacyExtensions entry for systemd-
  networkd (man systemd.network, [Network] section), and the
  ipv6.ip6-privacy entry for NetworkManager
  (https://developer.gnome.org/NetworkManager/stable/settings-
  ipv6.html).

  Release and package data:

  > lsb_release -rd
  Description:    Ubuntu 17.10
  Release:        17.10

  > apt-cache policy nplan
  nplan:
    Installed: 0.32~17.10.1
    Candidate: 0.32~17.10.1
    Version table:
   *** 0.32~17.10.1 500
          500 http://us.archive.ubuntu.com/ubuntu artful-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       0.30 500
          500 http://us.archive.ubuntu.com/ubuntu artful/main amd64 Packages

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