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  • nsupdate: using "wildcard" TTL when removing specific record

    From Petr Bena@petr@bena.rocks to bind-users on Mon Jun 1 10:45:25 2020
    From Newsgroup: comp.protocols.dns.bind

    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 1.2.3.4

    I want to delete exactly that record (A with IP 1.2.3.4), 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 1.2.3.4

    But I would like to do something like

    update delete record.domain.org * A 1.2.3.4

    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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  • From Mark Andrews@marka@isc.org to Petr Bena on Mon Jun 1 19:27:26 2020
    From Newsgroup: comp.protocols.dns.bind

    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@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 1.2.3.4

    I want to delete exactly that record (A with IP 1.2.3.4), 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 1.2.3.4

    But I would like to do something like

    update delete record.domain.org * A 1.2.3.4

    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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