Add exclude { ::/0; }; to the dns64 definition. It won’t prevent the lookup but 
will cause the AAAA returned to be ignored. 

-- 
Mark Andrews

> On 3 Apr 2018, at 23:14, Rick Tillery <rtilleryw...@gmail.com> wrote:
> 
> I am creating an IPv6-only subnet to test software for IPv6 compatibility.  
> We just need to check that the software can function correctly in an IPv6 
> network, so prefixed IPv4 addresses work the same as real IPv6 addresses in 
> this testing.  We also don't actually need access to the IPv6 Internet, just 
> the IPv4 Internet, which is good, because our network connection is only 
> IPv4, and we have no tunnelling.
> 
> Using TAYGA as the NAT64, I have configured the subnet so that prefixed IPv4 
> addresses are working, and I can reach IPv4 sites.  However, I need DNS64 to 
> provide name resolution to these prefixed IPv4 addresses.
> 
> Google's DNS64 server requires access to the IPv6 Internet (according to 
> Google on their support group), so it won't work for us.  So I have to 
> configure my own DNS64 server, and Bind seems like just the thing.
> 
> 1.  All the documentation for DNS64 says that when a name lookup is send to a 
> DNS64 server, it first checks for an IPv6 address, and if one is not 
> available, it gets the IPv4 address, prefixes it to create an IPv6 address, 
> and in either case returns an AAAA record.  But can Bind be configured on an 
> IPv4 domain, such that it skips the first part and just returns the wrapped 
> IPv4 address in an AAAA record?
> 
> 2.  I already have 2 VMs configured for my subnet, one acting as router, and 
> the other my NAT64.  Can Bind share the Debian TAYGA/NAT64 machine, or do I 
> need to create a new VM for Bind as well?
> 
> Thanks for your help!
> Rick
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