Open Resolver Dataset Update

Mon Apr 8 07:55:52 UTC 2013

In message <51626CF9.1040109 at phyxia.net>, Tom Laermans writes:
> On 7/04/2013 19:46, Jared Mauch wrote:
> > I've continued to update my dataset originally posted about two weeks ago.  Please take a moment
>  and review your CIDRs which may be running an open resolver.
> >
> > I've exposed one additional bit in the user-interface that may be helpful.  Some DNS servers wil
> l respond with RCODE=0 (OK) but not provide recursion.  nearly 90% of the servers in the database 
> provide recursion.
> What is the rationale behind listing servers not providing recursion on 
> a list of open resolvers?
> 
> As far as I know, responding either NOERROR or REFUSED produces packets 
> of the same size.
> 
> Tom

NOERROR can be a referral.
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org