BIND 9.11.5-P4 can't do ipv6 recursion

[Mark Andrews]

On the server run "dig version.bind txt ch @::1”.  This should get a response and
work from there.  e.g. "dig version.bind txt ch @other_addresses”, then try from
different machines.  Named has had IPv6 support for 2 decades now.  The problem
will almost certainly be with the environment not the server.

> On 19 Mar 2019, at 2:33 pm, celia <66183738 at qq.com> wrote:
> 
> Hello ALL,
>      I set up a  recursion DNS in our college. It works well in ipv4 request,but can not resolve ipv6 request. The named.conf file is as follows:
> 
> acl "trusted"{202.115.253.0/24;202.112.16.0/24;202.112.14.0/23;};
> acl "ipv6" {2001:da8:6000::/48;};
> 
> options{
>         directory "/usr/local/named/etc/";
>         pid-file "/var/run/named/named.pid";
>         statistics-file "/var/named/data/named_stats.txt";
>  
>         listen-on-v6 {any;}; 
>         recursion yes;
>         allow-recursion {trusted;ipv6;};
>         recursive-clients 20000;
>         tcp-clients 500;
>         allow-query-cache {trusted;ipv6;};
>         dump-file "/var/named/data/cache_dump.db";
> };
>  I have tried some methods to solve this problem,such as stop the firewall, chanege "listen-on-v6"option to "listen-on-v6{my ipv6 address;}",it does not work. i can ping my DNS'ipv6 address,but when using lookup,it shows time out ...
> the system log shows :listening on IPv6 interfaces,port 53,but i am sure port 53 does not response the request. 
> 
> thanks for help
> best regards
> celia
> 2019-03-19
> 
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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