[Pkg-samba-maint] Bug#714370: samba4: samba_dnsupdate choose wrong IPV6 address to connect to

[Manuel Sabban]

Package: samba4
Version: 4.0.3+dfsg1-0.1
Severity: minor
Tags: upstream

Dear Maintainer,

I tried to make the dnsupdate work with samba4. The configuration of
our dns quite simple. We have a master dns that forward all requests
concerning the samba4 domain to the samba4 server. Our samba4
installation use samba_dlz and bind to achieve the dns update.

Our site is IPV6 enabled. But as we have an IPV4 class B, we choose to
calculate the IPV6 from each computer basically from the IPV4 and our
prefix. When debugging the dnsupdate I was surprised to see that samba
was trying to connect to a server DNS on an IPV6 calculated from our
prefix and the server MAC address (just as the norm says), but for all
I am aware of, this address is not used not listed anywhere.

To fix it, I just attached this new formed address to the interface
(with netmask of /128).

I hope this can help.

Thanks for your work.
Best regards,

-- System Information:
Debian Release: 7.1
  APT prefers unstable
  APT policy: (50, 'unstable'), (60, 'testing'), (995, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.2.0-4-amd64
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to fr_FR.UTF-8)
Shell: /bin/sh linked to /bin/dash