nanog mailing list archives

Re: US Navy Contact.


From: Todd Vierling <tv () duh org>
Date: Fri, 11 Mar 2005 11:11:15 -0500 (EST)


On Thu, 10 Mar 2005 Michael.Dillon () radianz com wrote:

One of our
netblocks appears to be filtered somewhere inside their network,
preventing DNS lookups from completing, thus preventing e-mail from
being delivered.

Am I reading this correctly? You are saying that you
have engineered a single point of failure in your network
and now you are suffering as a result?

From how I read it, the original poster did not have a network failure, but
rather is being afflicted by deliberate packet filtering.  That is *not* a
SPOF effect.

Sure, multiple diverse nameservers are preferable, but even that will never
prevent blanket blocking from causing filures at some remote site.

-- 
-- Todd Vierling <tv () duh org> <tv () pobox com>


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