[Novalug] DNS Servers

Jon LaBadie novalugml@jgcomp.com
Wed Jan 5 17:20:44 EST 2011


On Tue, Jan 04, 2011 at 10:23:37AM -0500, Dan Arico wrote:
> On Tuesday, January 04, 2011 08:47:24 am Jay Hart wrote:
> > The question I have is "Should you use two different DNS servers in your
> > config?"
> > 
> > For example:
> > 
> > 208.67.222.222
> > 71.252.0.22
> > 
> > This way, if one croaks the other should still work.
> > 
> > Jay
> 
> That's what I do. I couldn't tell you if I've ever had to go to a fallback 
> server, but I don't see how it could hurt.
> 
Most systems I've seen allow 3 DNS name services.  So you could
have 2 from the same source and an outside one.  If one of your
DNS nameservers is your router, then it is probably using 2 of
your ISP's servers already.

One thing that could be hurt by having multiple nameservers is
the length of time for queries that ultimately fail, either
because servers are down or the requested site did not exist.

jon
-- 
Jon H. LaBadie                  novalugml@jgcomp.com
 JG Computing
 12027 Creekbend Drive		(703) 787-0884
 Reston, VA  20194		(703) 787-0922 (fax)



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