why am I seeing update denied in Bind9 logs for dhcp clients ?

[Gregory Machin]

Thanks for taking time to explain.

G
On Sat, Mar 3, 2012 at 2:06 AM, Glenn Satchell
<glenn.satchell at uniq.com.au> wrote:
> You need to add this to the appropriate scope (usually global):
>
> ignore client-updates;
>
> The reasons are explained inthe dhcpdconf manpage in the section titled
> "THE INTERIM DNS UPDATE SCHEME". Essentially it sends an option to the
> client to tell it that the server will do the DNS updates, rather than the
> client.
>
> There are some extra details, but they are covered in the man page.
>
> regards,
> -glenn
>
>> Gregory Machin wrote:
>>
>>>I have a ddns configuration with the dhcpd server writing dhcp clients
>>>hostname and ip to the bind9 dns server. But i'm seeing a lot of
>>>dhcp clients trying to writing into zones
>>
>> Windows clients by any chance ?
>>
>>>        zone "69.168.192.in-addr.arpa" {
>>>        type master;
>>>                file "/var/lib/bind/192.168.69.interenal.rev";
>>>                update-policy { grant dhcp-server-key subdomain
>>>69.168.192.in-addr.arpa. ANY;
>>>                                      grant * self * A TXT;
>>>                                };
>>>                };
>>
>> All I have is :
>> zone "0.168.192.in-addr.arpa" in {
>>          allow-update { key DHCP_UPDATER ; };
>>          file "192.168.0";
>>          type master;
>> };
>>
>> Default on Windows clients is for the client to attempt to update the
>> DNS - because "that's the way MS does it". You need to add "deny
>> client-updates" (I think, check the man page) to your DHCP config for
>> it to ignore clients requests to do their own updates.
>>
>> --
>> Simon Hobson
>>
>> Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
>> author Gladys Hobson. Novels - poetry - short stories - ideal as
>> Christmas stocking fillers. Some available as e-books.
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>
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