IPv6 logging noise

[Philip Prindeville]

> On Nov 20, 2025, at 4:04 PM, Doug Freed <dwfreed at isc.org> wrote:
> 
> 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


Not working for me:


Dec 11 13:47:03 OpenWrt2 named[32377]: the initial working directory is '/'
Dec 11 13:47:03 OpenWrt2 named[32377]: loading configuration from '/etc/bind/named.conf'
Dec 11 13:47:03 OpenWrt2 named[32377]: the working directory is now '/tmp/cache/bind'
Dec 11 13:47:03 OpenWrt2 named[32377]: /etc/bind/named.conf:25: expected one address and/or port
Dec 11 13:47:03 OpenWrt2 named[32377]: loading configuration: unexpected token
Dec 11 13:47:03 OpenWrt2 named[32377]: exiting (due to fatal error)
root at OpenWrt2:/etc/init.d#  root at OpenWrt2:/etc/init.d# sed -n -e 25p /etc/bind/named.conf
query-source-v6 { none; }; // no IPv6 logging noise
root at OpenWrt2:/etc/init.d#