How to configure isc-dhcpd-server to update reverse zone without client pre configuration?

[Vladimir Skubriev]

Thank you. I tried your solution.

It does not resolv an issue. Reverse zone update not occurs, until the
client is configured with fqdn.fqdn

2016-05-19 22:40 GMT+03:00 Bill Shirley <Bill at henagar.polymerindustries.biz>
:

> Maybe:
> group {
>     use-host-decl-names on;
>     option fqdn.fqdn = concat(config-option server.ddns-hostname, ".",
> config-option server.ddns-domainname);
>
>     host client {
>         hardware ethernet: 08:00:27:d8:78:e5
>         fixed-address client.example.lab;
>     }
>     host server {
>         hardware ethernet: xx:xx:xx:xx:xx:xx
>         fixed-address server.example.lab;
>     }
> }
>
> Bill
>
>
> On 5/18/2016 9:27 AM, Vladimir Skubriev wrote:
>
> How to configure isc-dhcpd-server to update reverse zone without client
> pre configuration?
>
> I'm trying to set up isc-dhcpd-server from ubuntu 16.04 (4.3.3-5ubuntu12)
> to configuring heterogeneous network with ubuntu, windows, macos, other ip
> devices.
>
> I'm already setuped bind to store ip address configuration of statically
> configured hosts in dns. My internal zone already has an A records like:
>
> client.example.lab a 900 192.168.1.10
> server.example.lab a 900 192.168.1.11
>
> Also I have statically defined hosts on dhcpd.conf like:
>
> host client {
> hardware ethernet: 08:00:27:d8:78:e5
> fixed-address client;
> }
>
> I don't want to update A records in my internal zone example.lab
> dynamically. Because this setup requires sustained attention to clean up
> zones because of update errors like 'YXDOMAIN, NXRRSET etc'
>
> I want to update dynamically only reverse zone of my internal subnet
> 192.168.1.0/24
>
> So I configured the dhcpd server as follows:
>
> ddns-updates on;
> do-forward-updates off;
>
> The documentation states that:
>
> do-forward-updates flag;
>
> ...
>
> If this statement is used to disable forward updates, the DHCP server will
> never attempt to update the client's A record, and will only ever attempt
> to update the client's PTR record if the client supplies an FQDN that
> should be placed in the PTR record using the fqdn option.
>
> I tried to setup this option manually on ubuntu in /etc/dhcp/dhclient.conf
> as follows:
>
> send fqdn.fqdn = "client.example.lab"
>
> In this case dhcpd server succesfully updates reverse PTR zone with this
> fqdn name. Also it is point the obtained ip to this fqdn name.
>
> But this workflow assumes that I need to configure each client in the net.
>
> Is there another way to configure isc-dhcp-server for retrive fqdn.fqdn
> from the server itself, without client pre-configuration?
>
> Is it is impossible now with isc-dhcp-server ?
>
>
>
> --
> Faithfully yours,
>
> CVision Lab System Administrator
> Vladimir Skubriev
>
>
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-- 
Faithfully yours,

CVision Lab System Administrator
Vladimir Skubriev
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