[DNSOP] Re: [v6ops] Re: Re: Moving DNS64 (RFC6147) to Internet Standard

["[e-mail]" <[e-mail]>]

We did a lot of testing of many possible scenarios in real 464XLAT deployments.

After many years in some of the, we keep collecting information from possible customers complains in case we need to avoid doing synthesis at the DNS64 servers for specific destinations.

It never happened. So that’s what I call real would experience. As said several times, will love to hear from others if they are having this problem and “how much”.


> El 13 abr 2026, a las 15:45, Philip Homburg <[e-mail]> escribió:
> 
>>> IPv6 and DNSSEC are independent technologies. We cannot assume that one
>>> implies the other.
>> 
>> And do you have real experience of deployments breaking it? I will
>> love to see those cases.
> 
> You never installed a DNSSEC validating proxy on a laptop without CLAT?
> 
>> I think the point is to understand that DNSSEC with DNS64 is broken
>> only in a very very very small % of situation, which can also be
>> resolved.
> 
> The problem with DNS64 is that it seems to work (to some extent at least)
> without CLAT. But as soon as you install a DNSSEC validating proxy,
> or some other DNSSEC validation, access to IPv4 is lost.
> 
> The same thing is of course true for a DNS proxy that connects to a 
> public resolver over DoH or DoT.
> 
> That means that devices that rely on DNS64 make it is a lot harder to
> deploy those technologies.
> 


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