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Re: Disabling AAAA dns lookups in NetBSD

On 26/08/2013, at 9:03 PM, David Brownlee <> wrote:

> I'm attempting to use a perl script which calls Mail::IMAPClient to
> connect to google (which has both IPv4 and IPv6). Obviously NetBSD
> picks up the IPv6 address first, and then fails with "No route to
> host".
> ...
> Short of compiling a custom kernel, how would I do one of the following?
> - disable AAAA lookup
> - prefer A lookup to AAAA
> - disable all IPv6 activity on the system

You could also fix Mail::IMAPClient so that it does the right thing. It is 
almost certainly using a library call that returns a list of IP addresses and 
the code just needs adjusting to try each IP address until a successful 
connection is made. That's what I make my programs do and it is the modern way 
of using gethostbyname(3) (in as much as using gethostbyname(3) could be said 
to be modern).


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