DDNS - limitation and excluding updates from certain networks

[MAYER Hans]

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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