On 11/20/25 11:07, Philip Prindeville via bind-users wrote:
Hi,
I’m on a US residential ISP, and they don’t support IPv6. As a result, I’ve
disabled it locally as well with `options { listen-on-ipv6 { none; }; };`.
Well, there are more options than that, but that’s the relevant one.
If I run with `-4` then the noise goes away.
I was wondering if:
(1) that `listen-on-ipv6 { none;}` should imply `-4` (the simplest) or
(2) that there’s an easy way to parse and dump the options so my startup script
can see if this option is set or not, and if it, add `-4` to the arguments it
uses to start up named.
I ask the second question because of the format of the config file, newlines
and spaces are arbitrary so there’s no single canonical format I can search for.
Thanks,
-Philip
Starting with 9.20.5, you can use `query-source-v6 { none; };` to
disable IPv6 for upstream queries. Thus `-4` effectively becomes:
listen-on-v6 { none; };
query-source-v6 { none; };
The difference is that the config settings can be changed at runtime
with a reload, whereas changing the state of `-4` requires restarting named.
-Doug
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