Re: [DNSOP] Question about usage of ip6.arpa and in-addr.arpa

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

On 12 Mar 2018, at 16:41, Jim Reid wrote:

>> On 12 Mar 2018, at 23:27, Paul Hoffman <[e-mail]> wrote:
>>
>> For which other protocols did you want certificates with IP addresses 
>> as identifiers?
>
> I think these may be needed for SIP, particularly roving (nameless) 
> clients. And quite possibly for P2P applications.

How could you use ACME to validate the IP address of a roving client or 
a P2P application that has no fixed IP address?

Having said that:

On 12 Mar 2018, at 16:43, Paul Vixie wrote:

> we need to use TLS to secure both dns-over-https and some forms of 
> TCP/53 in
> which the server's address is known but not its name.

This seems like a reasonable use case.

>> If your list is longer than zero, are you willing to help Roland with 
>> a solution using DNS records for validation that has any chance of 
>> being usable?
>
> Yes, I’d be willing to work with Roland on at least finding and 
> documenting likely use cases. Are you? Whether we (or others) can then 
> come up with something that has any chance of being usable is another 
> matter.

Exactly. Given the difficulty of getting stable in-addr.arpa and 
ipv6.arpa records at all, being able to write a TXT record into them 
seems completely unstable. Thus, "temporarily put up a web server where 
you were going to put up the DNS (or other) server" seems the most 
likely to work reliably. If you have other ideas, that's great.

--Paul Hoffman