DDNS - limitation and excluding updates from certain networks
MAYER Hans
Hans.Mayer at iiasa.ac.at
Wed Dec 27 20:31:20 UTC 2017
Hello Dirk,
Many thanks. Yes, that’s exactly what I am looking for.
I have "ddns-update-style interim;”
But what do you mean with "static entry” ?
For example my "static entries” are all servers.
But the server don’t have any DHCP entries. The IP addresses of the interfaces are “hard wired”.
And they have a DNS entry. Long time ago generated and should never be changed by any DHCP client.
( If the client should ever have the same name as a server )
Do all your clients also generate a TXT record within DNS ?
Kind regards
Hans
—
> On 26.12.2017, at 22:35, Dirk Gottschalk via bind-users <bind-users at lists.isc.org> wrote:
>
> Hello Hans,
>
> Am Mittwoch, den 20.12.2017, 12:39 +0000 schrieb MAYER Hans:
>>
>> Dear All,
>>
>> My environment: We are using the latest version of BIND and DHCP from
>> ISC. Our workstations ( mostly Windows and some Mac ) are in certain
>> networks. Only these networks are allowed to do dynamic DNS updates.
>> So when a PC is switched on its IPv4, IPv4 reverse, IPv6 and reverse
>> is registered.
>>
>> So far everything works well.
>>
>> Is there a way to configure, that names which are registered in other
>> networks, are not allowed to be updated ?
>
> Ny DHCPd/BIND9 kombination does exactly what you mean. Existing zune entries
> are not changed by DHCPD, because DHCPD only adds new "unknown" Entries
> to the DNS database, or changes dynamic entrioes which have an existing DHID record set.
>
> If i try to use a name that is already set manually as a static entry, DHCPd throws an
> error to the logs like: "Record already available and no DHCID record foung, NOT mine!"
>
> Is this the behavior you want?
>
> I have set 'ddns-update-style standard' in my dhcpd.conf and it works well.
>
> Regards,
> Dirk
>
>
> --
> Dirk Gottschalk
> Paulusstrasse 6-8
> 52064 Aachen
> Tel.: +49 1573 1152350_______________________________________________
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