Question abut reserv zone

Darcy Kevin (FCA) kevin.darcy at
Mon Feb 12 23:36:59 UTC 2018

You mean, don't slave at all, and just maintain locally?

The problem the original poster may run into, however, is that there may be other records in that change dynamically, and those changes may not be reflected if only is maintained locally.

To be sure, a "sync" script could be run periodically to keep up to date. I've written such things in the past. But now we're talking about custom software, not something that can be accomplished using just BIND and its associated tools...

The other approach is to define zones for just the specific names that need to be "overridden" from the slave zone (Microsoft calls them "pinpoint zones"). That's a terrible solution, of course, since these zones are undelegated from their parent and thus special care must be taken to ensure that all resolvers which need to resolve the names in a specific way are configured appropriately (using master/slave/stub/forward). But at least it can be implemented using only BIND and its tools.

														- Kevin

-----Original Message-----
From: bind-users [mailto:bind-users-bounces at] On Behalf Of Mark Andrews
Sent: Monday, February 12, 2018 6:19 PM
To: Julie Xu <J.Xu at>
Cc: bind-users at
Subject: Re: Question abut reserv zone

In this example since the address is the same I would just pick one name (the name the machine knows itself as) and use that name for the PTR record.

I would also use DNS UPDATE to update the reverse zones rather than editing master files.  You can delegate update authority down to the <name,type> tuple level with DNS UPDATE.  Then it doesn’t matter which machines are holding master files for the reverse zones.


> On 13 Feb 2018, at 9:06 am, Julie Xu <J.Xu at> wrote:
>> Hi,
>> I have a zone, we say, all private address is in this zone. So, I have a revers zoon existed. I am the master.
>> Now, there is a new zone required - reverse should; we are secondary of this zone.
>> However, currently, there is some ip address in zone there which is  the range, they are still required.
>> For example we want, and both existed. 
>>                 The – – transferred from master dns for the domain ( both forward/reversed zones)
>>                 The –  original in zone file which we are the master.
> Both are A record.
>> What will happen if I create second reverse zoon for Is my current will lose? If it is true, do I have anyway to work around?
>> Any comments will be appreciated
>> Thanks in advance
>> Julie Xu
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Mark Andrews, ISC
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