Date: Thu, 28 Mar 2013 15:58:32 +0100 From: Mattia Rossi <mattia.rossi.mailinglists@gmail.com> To: freebsd-net@freebsd.org Subject: Re: Win7 client, IPv6 network, multicast DNS equests and BIND name server? Message-ID: <51545A98.9020506@gmail.com> In-Reply-To: <394652604.20130328174952@serebryakov.spb.ru> References: <394652604.20130328174952@serebryakov.spb.ru>
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Am 28.03.2013 14:49, schrieb Lev Serebryakov:
> Hello, Freebsd-net.
>
> This question is not very FreeBSD specific, but as my router and DNS
> server are FreeBSD-based, I think a could ask it here and don't
> subscribe do BIND-related list, Ok?
>
> When DHCPv4 is not available, Win7 clients on my network pick up
> proper IPv6 prefix, but cannot pick up DNS server name from router
> advertisment. In such situation Win7 clients try to use ff01::
> multicast addresses for DNS resolution.
>
> I have bind server, which listens on all addresses (udp6 *:53), but
> it seems, that it doesn't answer on these requests :(
>
> Is it possible to configure BIND (system one) to process such
> requests?
>
In my experience you need to run a DHCPv6 server along with the rtadvd
daemon to get the DNS server to your Win7 box.
In rtadvd.conf set the raflags to:
:raflags="o":\
This tells the client to look for a DHCPv6 server, and to grab the
information supplied there.
In your dhcpd.conf (ISC DHCPD) then you need an entry like this:
subnet6 2001:db8::/64 {
option dhcp6.name-servers 2001:db8::1;
}
Where the subnet has to reflect the actual subnet configured on the
interface you're sending out DHCP offers.
In rc.conf add:
dhcpd6_enable="YES"
dhcpd6_ifaces="em0" or whatever interface DHCP should listen on.
And now your Win7 should be happy.
Win7 using ff01: for DNS lookups seems a bit strange to me, as I thought
that Win7 is using LLMNR
(http://en.wikipedia.org/wiki/Link-local_Multicast_Name_Resolution), the
counterpart to MDNS (http://en.wikipedia.org/wiki/Multicast_DNS) to look
up names on the local Lan and to discover services
(http://en.wikipedia.org/wiki/Zero_configuration_networking). Both use
addresses from the ff02: range.
I've looked into getting MDNS to update BIND like DHCP would do for
DDNS, but had no luck to get that going.
I don't think LLMNR could interoperate with BIND at all.
Hope that helps.
Cheers,
Mat
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