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Re: Happy Eyeballs doesn't seem to work with c-ares when IPv6 name servers on top of the name server list don't respond

From: Cristian Rodríguez via curl-library <>
Date: Thu, 25 Nov 2021 23:10:01 -0300

On Wed, Nov 24, 2021 at 11:12 PM Dmitry Karpov via curl-library
<> wrote:

> Is it possible to work around this issue somehow?

Yes, keep a local dns cache running and query that instead, nowadays
most newer distros ship with systemd-resolved.. if that's not what you
want, unbound will do the trick.

To make sure my thoughts on this are correct can you tell me what icmp
error you get ON THE WIRE about :

IPv6 server1 <not responding>

IPv6 server2 <not responding>

and does the attached c-ares patch makes any difference?

Received on 2021-11-26