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

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

Let me repeat this.

The discovery is not in RFC6147, but RFC7050. This involved some security issues fixed by RFC8880.

In my experience this discovery mechanism is not being actually used (if anyone has a different experience I will be very happy to hear). So I will actually advocate for deprecating RFC7050, or at least not recommend its use anymore in favor of PREF64 (RFC8181) and PCP (RFC7225).

Regards,
Jordi

@jordipalet


> El 10 abr 2026, a las 9:43, Philip Homburg <[e-mail]> escribió:
> 
>> I'm very torn on that, because like it or not DNS64 is stable,
>> well-defined, and widely implemented. (I'd also prefer to abolish
>> the problem by abolishing the distinction between Proposed Standard
>> and Internet Standard, but that's another story.)
>> 
>> But we still do need co-existence for very practical reasons. That's
>> why v6ops is developing the IPv6-mostly approach in draft-ietf-v6ops-6mops,
>> which explicitly says:  "Those concerns make DNS64 a suboptimal
>> and undesirable solution long-term.  To eliminate the needs for
>> DNS64..." etc.
> 
> What do we gain by advancing DNS64? It seems that draft-ietf-v6ops-6mops
> uses DNS64 mainly for discovery of the translation prefix. If DNS64 would be
> scoped such that it only works for ipv4only.arpa. then there is not a lot
> of harm in having that as part of a DNS resolver.
> 
> Having a full DNS64 component only for the purpose of discovering the
> translation prefix is likely to do more harm than good.
> 
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