Re: [opensuse] Ipv6 and dns

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On 2012-05-29 21:49, Carl Hartung wrote:
On Tue, 29 May 2012 21:33:13 +0200 Per Jessen <> wrote:

Thanks for all the responses, first thing .-)

Yeah ... how a DNS query arrives will at most determine how the
response will be sent back. Whether a DNS query arrives via IPv4 or
IPv6 does not in any way determine what the response contains.



So the server sends back two records instead of one, and the client
just discards the one it can't use. That's not very efficient (stupid
server!) Thanks for the clarification ;-)

The problem is this:

cer@Telcontar:~> host download.opensuse.org
download.opensuse.org has address 195.135.221.134
download.opensuse.org has IPv6 address 2001:67c:2178:8::13
cer@Telcontar:~>

Now look at this message from the kernel when booting and setting up the
network:

<0.7> 2012-05-26 14:27:40 Telcontar kernel - - - [ 266.098003] eth0: no
IPv6 routers present


Nevertheless, if the IPv6 address fails, programs attempt to send IPv6
over internet, even though there is no IPv6 router, only same segment
transport.


One method of avoiding these connectivity problems would be to somehow
not getting the IPv6 address in DNS queries, somehow.



- --
Cheers / Saludos,

Carlos E. R.
(from 11.4 x86_64 "Celadon" at Telcontar)
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