From: ahoward <ahoward@...>
Date: 2003-10-10T01:35:03+09:00
Subject: Re: TCPSocket delay problem

On Tue, 4 Mar 2003, Jacob News wrote:

> Ruby is making a request for Type AAAA (ipv6) record.
>
> Dnsquery is making a request for Type A (ipv4) record.
>
> Try this to see the problem:
>
> 	dnsquery -t aaaa ad.doubleclick.net
>
> which times out after 10 seconds.  The DNS server for doubleclick.net
> is refusing to answer AAAA queries which is just plain rude, but what
> else is new for a company who makes its money by annoying the public?
>
> Of course a better "solution" would be to ask getaddrinfo() to only
> use the protocol types you are interested in (AF_INET).  A previous
> poster demonstrated how to do this in ruby.  Unfortunately, there are
> so many domains out there whose dns servers ignore AAAA requests that
> using an ipv6-enabled web browser is a straight path to profanity.

this is valuable information.  thanks for the info!

perhaps you should forward your 'better' solution on to ruby-dev?

-a

--
  ====================================
  | Ara Howard
  | NOAA Forecast Systems Laboratory
  | Information and Technology Services
  | Data Systems Group
  | R/FST 325 Broadway
  | Boulder, CO 80305-3328
  | Email: ahoward@fsl.noaa.gov
  | Phone:  303-497-7238
  | Fax:    303-497-7259
  ====================================