Broken DNS client resolvers (Was: Dealing with filtered 6to4 clients)

[Charles Wyble]

On Oct 27, 2009, at 9:37 AM, Rémi Denis-Courmont wrote:
>>
>
> AFAIK, that case is worked around in glibc 2.10:
> * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
>  servers (the case, e.g., for some people using the built-in DNS
>  server in ADSL modems/routers).  There is a once-per-process timeout
>  in case of a broken server.  To avoid it, users can run nscd or put
>  'options single-request' in /etc/resolv.conf.
>  Implemented by Ulrich Drepper.


I would recommend not running nscd. It causes all manner of issues and  
weirdness.

Haven't played with the single-request in /etc/resolv.conf so can't  
comment on that.

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