Level3/GTEI well-known DNS down?

Sat Jan 19 15:45:27 UTC 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: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu] On Behalf Of
Joe Provo
Sent: Saturday, January 19, 2008 10:33 AM
To: nanog at nanog.org
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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