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Re: Open Resolver Dataset Update
From: Jared Mauch <jared () puck nether net>
Date: Tue, 9 Apr 2013 16:15:39 -0400


The main criteria is the RCODE=0 vs RCODE=5 refused.

I exposed the Recursion Available bit this last week to cover more of the use cases, but many servers provide a very 
large referral to root.

You are correct in that your system doesn't provide that so should be less "visible" as a result.  I haven't coded 
everything to pull out that level of data from the responses.

Of the responding IPs, a fair percentage 89% respond with the RA bit set.  I'm working to close the gap on exposing the 
direct data of those last 11% in a more detailed bit of information, including if it provides a root referral or 

Hope this helps,

- Jared

On Apr 9, 2013, at 8:59 AM, Tom Laermans <tom.laermans () phyxia net> wrote:


If you mean there can be a referral with RCODE=0 and Recursion Available
= 0, you'll need a third column actually documenting if there is a

This server is listed in ORP:

$ dig www.google.be @

; <<>> DiG 9.7.3 <<>> www.google.be @
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 615
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;www.google.be.                 IN      A

;; Query time: 6 msec
;; WHEN: Tue Apr  9 14:58:21 2013
;; MSG SIZE  rcvd: 31

RCODE=0, Recursion available=0:

Hence my question, what is it doing wrong?


On Mon, 2013-04-08 at 07:05 -0400, Jared Mauch wrote:
The referral, including a referral to root can be quite large. Even larger than answering a normal query. I have 
broken the data out for the purpose of letting people identify the IPs that provide that. 

Jared Mauch

On Apr 8, 2013, at 3:08 AM, Tom Laermans <tom.laermans () phyxia net> wrote:

As far as I know, responding either NOERROR or REFUSED produces packets of the same size.

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