[dns-wg] AAAA lookup misbehaviour

On 8 Sep, 2004, at 13:05, David Malone wrote:

> As the next RIPE meeting is rolling up, I just thought I'd raise
> the AAAA lookup misbehaviour thread again. To briefly remind you
> of where we'd got to:
>
> 	1) I'd written up a short describing the problem
> 	   with authoritative servers and recommending that
> 	   new name servers should be tested before deployment.
> 	2) Alvaro and Colm had highlighted some problems with
> 	   client resolver libraries, but it wasn't clear if
> 	   a description of these problems should live in the
> 	   same document.
> 	3) We were trying to figure out what action could be
> 	   taken to encourage people to fix existing problem
> 	   name servers.
>
> So, other than the hall of shame, what options do we have to
> encourage people to fix their software?

Writing a RIPE document. People use them as reference material when 
they are well written, both within and outside the RIPE region

> Working with vendors
> of DNS solutions is certainly a good idea, and the dns-wg's
> name could be useful when convincing vendors to take action.
>

Sure, buy me a beer. I am easy to convince :-)
Now seriously, we try to do the right thing, we may have bugs some 
times. For instance there was some time ago a bug that went like this:


1679.   [bug]           When there was a single nameserver with multiple
                         addresses for a zone not all addresses were 
tried.
                         [RT #11706]

	e.g.
	      If the server had one AAAA and one A, then A would not be
	tried.

	They will mark all addresses bad if they get a bad response
	from one of the addresses (bad response != no response).

Although you could argue this goes in your favour as IPv6 promoter.


> Another possibility would be to recommend that when problem
> DNS servers are found, then they should be considered lame
> and so dropped from the advertised list of NSs for a zone.
>

Well, that would depend on the nature of the misbehaviour. I am looking 
forward to your DNS-wg contribution.

Joao