On Tue, Mar 1, 2022 at 10:52 AM Martin Duke via Datatracker < [email protected]> wrote:
> ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > > To this DNS non-expert, I found it hard to follow the motivation for > AliasMode. > In particular, I asked myself the following questions that could have been > answered in the Introduction or in (2.4.2): > > - Why is it not OK for a CNAME to alias the apex, but OK for AliasMode to > do > so? [having asked around, it's because CNAME aliases all the record types, > which is nonsensical for the apex, and AliasMode does not] > OK, we can add or cite an explanation ( https://github.com/MikeBishop/dns-alt-svc/issues/373). - For non-apex domains, under what conditions would I use AliasMode instead > of > a CNAME? Is it just when I don't want to bring along record types besides > A, > AAAA, and SVCB? > A SVCB record is always for a single "origin" (scheme, host, and port). A CNAME is for an entire name. I would say that's the dispositive factor in determining which one you want to use.
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