Re: [Nolug] ISP failover w/DNS

From: Ron Johnson <ron.l.johnson_at_cox.net>
Date: Sat, 14 May 2011 13:59:55 -0500
Message-ID: <4DCED12B.1080706@cox.net>

Do these routers have DNS proxy servers?

On 05/14/2011 01:52 PM, John Souvestre wrote:
> Hi Chris.
>
> I’ve seen a few low-end units which don’t, but most do.
>
> Oh, and as you surmised, the local machines should use the router for
> their DNS lookups. Actually, this is true in general, even on a LAN with
> only one feed. You don’t want to hard code the vendor’s DNS resolvers
> into all your machines. Before someone says it… The extra time this adds
> is negligible.
>
> Interleaving would help, if you have to, yes. But first find out if
> either of the vendors allows external access (use by anyone, not just
> those in their own address space). Most ISP’s don’t, but some do.
>
> Also, you could consider using some of the “public” DNS resolvers which
> are open to all, like the ones which Google offers. I have found this to
> be a bad idea, in general, since the extra latency to reach them
> surpasses any benefit.
>
> Finally, you could set up your own DNS resolver inside the LAN.
>

-- 
"Neither the wisest constitution nor the wisest laws will secure
the liberty and happiness of a people whose manners are universally
corrupt."
Samuel Adams, essay in The Public Advertiser, 1749
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