disable ipv6 source query

Warren Kumari warren at kumari.net
Wed Jun 22 01:55:06 UTC 2016


On Tuesday, June 21, 2016, Mark Andrews <marka at isc.org> wrote:

>
>         server ::/0 { bogus yes; };


Eeeeeeeeww! That's gross, but in a bizarrely satisfying way.

W



>
> In message <
> CAJS9+YbY3VL3kEhtJMt58eKQrF6QazfvT3kHVy05q26LMPTmkg at mail.gmail.com
> <javascript:;>>, Hillary Nelson writes:
> > We are moving our v6 DNS from F5 to anycast, since F5 can translate
> address
> > from v6 to v4, our backend servers are still only v4 and we never have
> > problem to resolve hostname with v4 only.
> >
> > Now for anycast, I want to enable v6 with private address only, but seems
> > like named favors v6 and using it to source query other nameserver, it
> will
> > try v4 if v6 fails, like this(I've configured source-query-v6 address
> ::1
> > so v6 always fails):
> >
> > 21:04:33.303536 IP6 ::1.34892 > 2001:dcd:1::7.53: 33940% [1au] A?
> > example.com. (48)
> > 21:04:34.146521 IP 1.1.1.1.58822 > 2.2.2.2: 55501% [1au] A? example.com.
> > (48)
> >
> >
> > My question is how to config named to only using v4 address to query
> other
> > nameserver, but still keep an listening v6 address?
> >
> > Thanks in advance!!
> > Hillary
> >
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org
> <javascript:;>
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-- 
I don't think the execution is relevant when it was obviously a bad idea in
the first place.
This is like putting rabid weasels in your pants, and later expressing
regret at having chosen those particular rabid weasels and that pair of
pants.
   ---maf
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