nsupdate: using "wildcard" TTL when removing specific record

Mark Andrews marka at isc.org
Mon Jun 1 09:27:26 UTC 2020

TTL is ignored on delete if it present.  It is set to 0 when sending.

2.5.4 - Delete An RR From An RRset

   RRs to be deleted are added to the Update Section.  The NAME, TYPE,
   RDLENGTH and RDATA must match the RR being deleted.  TTL must be
   specified as zero (0) and will otherwise be ignored by the primary
   master.  CLASS must be specified as NONE to distinguish this from an
   RR addition.  If no such RRs exist, then this Update RR will be
   silently ignored by the primary master.

> On 1 Jun 2020, at 18:45, Petr Bena <petr at bena.rocks> wrote:
> Hello,
> Is there any way to tell nsupdate to delete specific record with ANY TTL value? For example I have following record:
> record.domain.org 3500 A
> I want to delete exactly that record (A with IP, except I don't know what the TTL is, normally, if I knew the TTL, I would do
> update delete record.domain.org 3500 A
> But I would like to do something like
> update delete record.domain.org * A
> Is there any way to accomplish this, or do I always have to retrieve the record somehow, figure out the TTL and then continue?
> Thanks
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Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka at isc.org

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