2018-02-01 - Future - Tony Finch
The IETF dnsop working group are currently discussing a draft specification for an ANAME RR type. The basic idea is that an ANAME is like a CNAME, except it only works for A and AAAA IP address queries, and it can coexist with other records such as SOA (at a zone apex) or MX.
I'm following the ANAME work with great interest because it will make certain configuration problems much simpler for us. I have made some extensive ANAME review comments.
An ANAME is rather different from what the IP Register database calls
an aname object. An aname is a name for a set of existing IP
addresses, which can be an arbitrary subset of the combined addresses
of multiple boxes or vboxes, whereas an ANAME copies all the
addresses from exactly one target name.
There is more about
the general problem of aliases in the IP Register database
in one of the items I posted in December. I am still unsure how the
new aliasing model might work; perhaps it will become more clear when
I have a better idea about how the existing aname implementation and
its limitations.