Keith, Yes, the DAC service looks interesting; although it would need to be made more generic. A lightweight protocol that is focused on availability would be preferred. It would be good to get a list of use cases to understand the need for such a service.
— JG James Gould Distinguished Engineer jgo...@verisign.com 703-948-3271 12061 Bluemont Way Reston, VA 20190 VerisignInc.com <http://verisigninc.com/> On 12/16/16, 8:59 AM, "regext on behalf of Keith Gaughan" <regext-boun...@ietf.org on behalf of ke...@blacknight.com> wrote: On 16/12/16 13:42, Gould, James wrote: > I too have heard interest in an availability service that could be > discussed, but this should be separated from RDAP. Agreed. There are many, many problems with using RDAP for this, not least of which that it's ill suited to bulk queries, which, speaking from experience on the domain registrar side of things, is an essential part of any DAS. If you want a good model for a dedicated DAS protocol, the one Nominet use[1] is sensible, and, with a few small tweaks[2], could be made generally useful. [1] http://registrars.nominet.uk/namespace/uk/registration-and-domain-management/query-tools/dac/instructions [2] A greeting to indicate a list of response headers to the client would be sufficient. > I view availability via EPP as the best channel for authorized > parties to go, since it is authoritative and it includes all the > availability business logic. EPP is a standard, so registries that > have chosen not to implement it may not implement another standard > either. There's room for a dedicated DAS protocol. Specifically, a registrar may wish to allow specific customers or internal services query the availability of domains without hitting an EPP server directly. This is what we do internally in Blacknight. A dedicated DAS can have lower overhead than EPP too. > A public availability service would look a lot more like a DNS > service than an RDAP lookup service, since it could be a larger > dependency for a broader set of real-time clients and therefore needs > to be focused on scalability and accuracy (complete set of > availability logic) over breadth of lookup features. It would be > great to understand the use cases for a public availability service > to define the need prior to making proposals on a solution. K. -- Keith Gaughan, Development Lead; PGP/GPG key ID: D5FC9D23 Blacknight Internet Solutions Ltd. <http://blacknight.host/> 12A Barrowside Business Park, Carlow, R93 X265, Ireland Registered in Ireland, Company No.: 370845 _______________________________________________ regext mailing list regext@ietf.org https://www.ietf.org/mailman/listinfo/regext _______________________________________________ regext mailing list regext@ietf.org https://www.ietf.org/mailman/listinfo/regext
