North American Network Operators Group

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RE: Level3/GTEI well-known DNS down?

  • From: Paul Stewart
  • Date: Sat Jan 19 10:58:23 2008

Not to start a debate but I've used OpenDNS since last year and been
VERY happy with it.... use it in situations where there is no localized
DNS server available....

And yes, to agree - open resolvers are very badly abused .. I'm
surprised it took them this long...

Paul


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Joe Provo
Sent: Saturday, January 19, 2008 10:33 AM
To: [email protected]
Subject: Re: Level3/GTEI well-known DNS down?


On Sat, Jan 19, 2008 at 02:36:14AM -0700, randal k wrote:
> Anybody know what is up/down with the GTE/Level3 name-servers used the
world
> over on 4.2.2.1, 4.2.2.2? Suddenly started getting no responses from
them
> for a couple of our side apps.

Testing from an l3 customer network which got responses and a non-l3
customer network which did not implies that they finally clamped down
on non-customer use of their anycasted resolvers.

> I hope these servers stick around forever, they're kind of an Internet
> legend.

Open resolvers are seriously abused by botnets and related baddies.
Perhaps you might need to run a set of resolvers, or get your service
provider[s] to give you something similar to well-tuned anycasted
resolvers.

Cheers,

Joe
--
             RSUC / GweepNet / Spunk / FnB / Usenix / SAGE




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