default local DNS caching name server

Reindl Harald h.reindl at
Sat Apr 12 15:04:09 UTC 2014

Am 12.04.2014 16:55, schrieb Paul Wouters:
> On Sat, 12 Apr 2014, Reindl Harald wrote:
>> a DNS server doing recursion don't ask any forwarder
> That's wrong. a DNS server can use a forwareder for some or all of its
> recursive queries. unbound+dnssec-triggerd mostly cause unbound to do
> full recursion but using the ISP nameserver as forward for all queries.

oh no - please try to understand what recursion means in case of DNS

may i suggest to read some docs because if i talk about DNS as one
who maintains 600 domains as DNS provider as well as Registry for
the .at domain and implemented DNS admin-backends years ago i know
what i am talking about

recursion is by definition

* ask the root server for
* answer of the root is "dunno, but you can ask xxx for .com"
* your DNS asks xxx for
* answer of xxx is "dunno, but you can ask ns1.whoever.tld for"

forwarding bypasses that and asks your ISP's or whatever configured
nameserver and never the root, so no, you don't do recursion in that
case, your forwarder may do or at least the last forwarder if the
DNS you asking itself does forwarding too - but that's not your
business then and you don't to recursion

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