[Pdns-users] Multips subnets in one Reverse Zone

[frank at kiwazo.be]

Hi Rob,

Yes, should be possible, PowerDNS won't complain about 2000-3000 or more records in the zone.

If you should or not depends on how often and how you'll change them.

Some web UIs might get slow if there are 3000 records in a zone, so try that out.

Frank


> On 21 Feb 2025, at 11:52, rob777 via Pdns-users <pdns-users at mailman.powerdns.com> wrote:
> 
> Hi
> 
> I have a theoretical question which i'm unsure about after AI und Forum research.
> 
> - i have 300-400 IP Subnets (mostly /24 Subnets in 10.0.0/8 CIDR)
> - The devices in these 300-400 Subnets have A records in a internal Powerdns Zone internal.mydomain.com <http://internal.mydomain.com/> 
> - There are not that much devices in these Subnetzs (total between 2000-3000 Devices/A-Record)
> - Until now we didnt have PTR Records in Reverse Zones for these internal records
> - We are thinking about configuring PTR Records for these internal devices in 300-400 Subnets
> - But if possible we would not like to have 300-400 Reverse Zones but instead having one single Reverse Zone 10.in-addr.arpa for all the devices in the subnets
> 
> So then having one PTR Zone 10.in-addr.arpa with entries like
> 
> 5.20.0.10.in-addr.arpa. IN PTR test.internal.mydomain.com <http://test.internal.mydomain.com/>.
> 4.0.2.10.in-addr.arpa. IN PTR ab.internal.mydomain.com <http://ab.internal.mydomain.com/>.
> 11.25.0.10.in-addr.arpa. IN PTR cc.internal.mydomain.com <http://cc.internal.mydomain.com/>.
> etc.
> 
> So about 2000-3000 such PTR Records in one PTR Zone..
> 
> Question:
> - Is it possible with Powerdns
> - And if yes: would you do it with regards to "Best practice" (probably not...)
> 
> 
> P.s i dont use any delegations on these internal Powerdns Servers
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