[radvd-devel-l] searching the list / DDNS

Jeff Sadowski jeff.sadowski at gmail.com
Tue Mar 1 11:04:47 EST 2011

On Mon, Feb 28, 2011 at 11:05 PM, Pekka Savola <pekkas at netcore.fi> wrote:
> On Mon, 28 Feb 2011, Reuben Hawkins wrote:
>> No.  It's not really possible with radvd.  Radvd's main purpose is to
>> advertise the network prefix(es).  A host can
>> trigger radvd to send the prefix, and radvd logs the link local address,
>> but the host doesn't obtain its address
>> from radvd, only the network prefix(es).  The host creates its own
>> address, and verifies it's unique with DAD
>> (Duplicate Address Detection).  Radvd in unaware what address the host
>> configured.
>> Additionally, a host can just wait for a periodic advertisement...  So a
>> host may receive the prefix info from radvd
>> and autoconfigure without radvd knowing about it.
>> DHCPv6 may do something like that (but that's a question for a different
>> mailing list)...
> To add to this, there isn't much that radvd (router advertisement) can do
> about this.
> The two basic models here are:
>  1) DHCPv6 address configuration where DHCP server updates DNS
>  2) Stateless address configuration where the host updates DNS
> We wrote a little bit about this in Section 7 of RFC4472.
> The biggest issue in the general case with 2) IMHO is authorization to do
> the DNS update.
I think my hardest part will be figuring out tcpdump so that its not
working extra hard.
I'll see what tools bind has to send it dns updates like dhcpd does.
> --
> Pekka Savola                 "You each name yourselves king, yet the
> Netcore Oy                    kingdom bleeds."
> Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
> --
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