Am 14.09.2015 um 07:31 schrieb Harshith Mulky:
I could not stop asking the question related to this. I am sorry if this is not relevant to this Topic Is it not possible to send multiple "A" Records for a same name with different IPs. It might be that the bind might be listening on multiple IPs on same server What would happen if one of the IP interfaces is not reachable?
the same as when it is a different machine, the client which chose that record will fail to connect, dns round-robin is for load-sharing and not failover
> ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 11 Sep 2015 15:48:32 +0200 > From: Matus UHLAR - fantomas <uh...@fantomas.sk> > To: bind-users@lists.isc.org > Subject: Re: Multiple A and PTR and the "main" ones? > Message-ID: <20150911134832.gc24...@fantomas.sk> > Content-Type: text/plain; charset=us-ascii; format=flowed > > >>On 09/11/2015 02:10 PM, Reindl Harald wrote: > >>>just don't specifiy more than one PTR for a IP > > >Am 11.09.2015 um 14:14 schrieb Marek Kozlowski: > >>Specifying multiple CNAMEs for the same alias is not possible > > On 11.09.15 14:22, Reindl Harald wrote: > >no idea what that means, a CNAME can point to anotehr CNAME in circles > > that's true, however not recomended. > It's also possible to have multiple CNAMEs pointing to the same record, > which I would recommend. > > >>defining more than one PTR for the same IP is possible I believe there > >>is some reason for it. > > >>I think sometimes I might be useful. Is it a bad practice? > > > >it is a bad practice and leads exactly to the problems you describe > >when the other side tries to verify A/PTR matching because there is > >just no ordering like there is also no rodering having multiple A > >records for the same name with different IP's
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