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John Doe 04-23-2010 09:19 AM

IPV6 and DNS...
 
Hi,

I keep getting entries like these in my logs:

network unreachable resolving '0.centos.pool.ntp.org/AAAA/IN': 2001:500:40::1#53: 1 Time(s)
network unreachable resolving '0.centos.pool.ntp.org/AAAA/IN': 2001:500:e::1#53: 1 Time(s)
network unreachable resolving '0.centos.pool.ntp.org/AAAA/IN': 2001:dc3::35#53: 1 Time(s)

I don't see any IPV6 parameters to disable in named.conf, apart from the 'listen-on-v6'
which I commented, and the 'query-source-v6' which is commented by default...
I disabled IPV6 in the sysconfig files; but not in the modprobe.conf though...
Can I just ignore these "errors"?

Thx,
JD



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Karanbir Singh 04-25-2010 12:51 AM

IPV6 and DNS...
 
On 23/04/10 10:19, John Doe wrote:
> Hi,
>
> I keep getting entries like these in my logs:
>
> network unreachable resolving '0.centos.pool.ntp.org/AAAA/IN': 2001:500:40::1#53: 1 Time(s)
> network unreachable resolving '0.centos.pool.ntp.org/AAAA/IN': 2001:500:e::1#53: 1 Time(s)
> network unreachable resolving '0.centos.pool.ntp.org/AAAA/IN': 2001:dc3::35#53: 1 Time(s)
>
> I don't see any IPV6 parameters to disable in named.conf, apart from the 'listen-on-v6'
> which I commented, and the 'query-source-v6' which is commented by default...
> I disabled IPV6 in the sysconfig files; but not in the modprobe.conf though...
> Can I just ignore these "errors"?

if you want to ignore these, yes its fine to do that. but a better fix
is to stop the client from looking these up and go straight to only
using ipv4 if thats all you really need. You'll notice a non-trivial
increase in dns performance as well.


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Karanbir Singh
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